getView not returning view parameters

getView not returning view parameters - java

I have an AdapterView that displays a list and headers that separate different list categories. The list is populated by a SQLite database with user input. So far everything is working.
I want to remove the headers when there are no items in the header's category. The code is as follows:
public View getView(int position, View convertView, ViewGroup parent)
{
int viewType = getItemViewType(position);
if (viewType == TYPE_NORMAL)
{
// If the convertView is a textview (group), ignore it
if (convertView instanceof TextView)
{
convertView = null;
}
final int mapCursorPos = getInteralItemPosition(position);
return super.getView(mapCursorPos, convertView, parent);
}
else
{
// Check if it's a text view
TextView text;
if (convertView == null || !(convertView instanceof TextView))
{
((ListView) parent).setDivider(null);
((ListView) parent).setDividerHeight(0);
text = (TextView) inflater.inflate(R.layout.main_list_group, parent, false);
}
else
{
text = (TextView) convertView;
}
final String group = groupsIndexer.get(position).getName(resources);
//Code to hide menu title.
text.setText(group);
text.setVisibility(View.INVISIBLE);
myCursor = getCursor();
initCols(myCursor);
myCursor.moveToFirst();
while (myCursor.isAfterLast() == false)
{
String groupCursor = getGroup(myCursor).getName(resources);
if (groupCursor == group)
{
text.setHeight(12);
text.setPadding(20, 10, 0, 10);
text.setVisibility(View.VISIBLE);
}
myCursor.moveToNext();
}
return text;
}
}
So, as you can see I started by setting the text as invisible and then querying the database to check if there is any item in their specific category and if there is I set the visibility to visible.
However when returning, the method seems to ignore whatever's in the while loop. Is it not possible to format each textview object individually through getView() like this?
Thanks in advance.

Here's something that should put you in the right direction.
import java.util.ArrayList;
import java.util.Collections;
import android.content.Context;
import android.database.Cursor;
import android.database.DataSetObserver;
import android.graphics.Paint;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class GroupedListAdapter extends BaseAdapter
{
private static final int TYPE_NORMAL = 0;
private static final int TYPE_GROUP = 1;
private static final int MAX_TYPES = 2;
private final Context mContext;
private final LayoutInflater mInflater;
private final ContactManager mContactManager;
private final ArrayList<GroupItem> mItems = new ArrayList<GroupItem>();
private final DataSetObserver mDataSetObserver = new MyDataSetObserver();
private boolean mDataValid = false;
private Cursor mCursor = null;
private int mIndexId;
private int mIndexSummary;
private int mIndexType;
private int mIndexSender;
private int mIndexReciever;
private int mIndexCompleted;
private int mIndexCompletedBy;
public GroupedListAdapter(Context context)
{
mContext = context;
mContactManager = new ContactManager(context);
mInflater = LayoutInflater.from(context);
}
public void changeCursor(Cursor newCursor)
{
if(newCursor == mCursor){
return;
}
Cursor oldCursor = mCursor;
if(oldCursor != null) {
if(mDataSetObserver != null){
oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
}
mCursor = newCursor;
if(newCursor != null){
if(mDataSetObserver != null){
newCursor.registerDataSetObserver(mDataSetObserver);
}
mIndexId = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns._ID);
mIndexSummary = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns.SUMMARY);
mIndexType = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns.TYPE);
mIndexSender = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns.SENDER);
mIndexReciever = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns.RECIEVER);
mIndexCompleted = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns.COMPLETED);
mIndexCompletedBy = newCursor.getColumnIndexOrThrow(DatabaseContract.Task.Columns.COMPLETED_BY);
// calculate types and index mappings
/*
* 1. Sent (5)
* 2. Item 5
* 3. Item 6
* 4. Received (9)
* 5. Item 9
* 6. Today (1)
* 7. Item 1
* 8. Item 2
* 9. Item 3
*
*/
// allocate
int count = newCursor.getCount();
mItems.ensureCapacity(count);
if(newCursor.moveToFirst()){
int i = 0;
do{
mItems.add(new GroupItem(getGroupId(newCursor), i, TYPE_NORMAL));
i++;
}while(newCursor.moveToNext());
}
Collections.sort(mItems);
int lastGroupId = -1;
for(int i = 0; i < mItems.size(); i++){
final GroupItem item = mItems.get(i);
if(lastGroupId != item.group_id){
mItems.add(i, new GroupItem(item, TYPE_GROUP));
lastGroupId = item.group_id;
}
}
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
}
else{
mDataValid = false;
mIndexId = -1;
mIndexSummary = -1;
mIndexType = -1;
mIndexSender = -1;
mIndexReciever = -1;
mIndexCompleted = -1;
mIndexCompletedBy = -1;
mItems.clear();
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
if(oldCursor != null) {
oldCursor.close();
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
if(!mDataValid) {
throw new IllegalStateException("this should only be called when the cursor is valid");
}
GroupItem item = mItems.get(position);
if(!mCursor.moveToPosition(item.position)) {
throw new IllegalStateException("couldn't move cursor to position " + position);
}
final View view;
if(convertView == null) {
if(item.type == TYPE_GROUP){
view = mInflater.inflate(R.layout.main_list_group, parent, false);
}
else if(item.type == TYPE_NORMAL){
view = mInflater.inflate(R.layout.main_list_item, parent, false);
}
else{
throw new IllegalStateException("Bad TaskItem type");
}
}
else{
view = convertView;
}
if(item.type == TYPE_GROUP){
TextView textGroup = (TextView)view.findViewById(R.id.task_group);
textGroup.setText(mContext.getString(item.group_id));
}
else if(item.type == TYPE_NORMAL){
TextView textTitle = (TextView)view.findViewById(R.id.task_title);
TextView textDescr = (TextView)view.findViewById(R.id.task_description);
String desc;
String type = mCursor.getString(mIndexType);
if(type.equals(DatabaseContract.Task.TASK_TYPE_OWNER)){
desc = mContext.getString(R.string.desc_example);
}
else if(type.equals(DatabaseContract.Task.TASK_TYPE_RECEV)){
final String sender = mCursor.getString(mIndexSender);
final String name = mContactManager.getContactName(sender);
desc = (name != null) ? name : sender;
}
else{
final String receiver = mCursor.getString(mIndexReciever);
final String name = mContactManager.getContactName(receiver);
desc = (name != null) ? name : receiver;
}
textDescr.setText(desc);
String title = mCursor.getString(mIndexSummary);
textTitle.setText(Character.toUpperCase(title.charAt(0)) + title.substring(1));
if(mCursor.getInt(mIndexCompleted) != 0){
textTitle.setPaintFlags(textTitle.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
}
else{
textTitle.setPaintFlags(textTitle.getPaintFlags() & ~Paint.STRIKE_THRU_TEXT_FLAG);
}
}
return view;
}
#Override
public Cursor getItem(int position)
{
if(mDataValid && mCursor != null){
mCursor.moveToPosition(mItems.get(position).position);
return mCursor;
}
else{
return null;
}
}
#Override
public long getItemId(int position)
{
if(mDataValid && mCursor != null){
if(mCursor.moveToPosition(mItems.get(position).position)){
return mCursor.getLong(mIndexId);
}
else{
return 0;
}
}
else{
return 0;
}
}
#Override
public int getItemViewType(int position)
{
if(mDataValid && mCursor != null){
return mItems.get(position).type;
}
else{
return IGNORE_ITEM_VIEW_TYPE;
}
}
#Override
public int getViewTypeCount()
{
return MAX_TYPES;
}
#Override
public int getCount()
{
if(mDataValid && mCursor != null){
return mItems.size();
}
else{
return 0;
}
}
public Cursor getCursor()
{
return mCursor;
}
#Override
public boolean hasStableIds()
{
return true;
}
private int getGroupId(Cursor c)
{
if(c.getString(mIndexType).equals(DatabaseContract.Task.TASK_TYPE_SENT)){
return R.string.group_sent;
}
else if(c.getString(mIndexType).equals(DatabaseContract.Task.TASK_TYPE_RECEV)){
return R.string.group_received;
}
else{
long time = c.getLong(mIndexCompletedBy);
long delta = (time - System.currentTimeMillis());
if(delta <= DateUtils.HOUR_IN_MILLIS){
return R.string.group_asap;
}
else if(delta <= DateUtils.DAY_IN_MILLIS){
return R.string.group_today;
}
else if(delta <= (DateUtils.DAY_IN_MILLIS * 2)){
return R.string.group_tomorrow;
}
else if(delta <= DateUtils.WEEK_IN_MILLIS){
return R.string.group_this_week;
}
else if(delta <= (DateUtils.WEEK_IN_MILLIS * 2)){
return R.string.group_next_week;
}
else{
return R.string.group_someday;
}
}
}
private class MyDataSetObserver extends DataSetObserver
{
#Override
public void onChanged()
{
mDataValid = true;
notifyDataSetChanged();
}
#Override
public void onInvalidated()
{
mDataValid = false;
notifyDataSetInvalidated();
}
}
private static class GroupItem implements Comparable<GroupItem>
{
public int group_id;
public int position;
public int type;
public GroupItem(int group_id, int position, int type)
{
this.group_id = group_id;
this.position = position;
this.type = type;
}
public GroupItem(GroupItem item, int type)
{
this.group_id = item.group_id;
this.position = item.position;
this.type = type;
}
#Override
public int compareTo(GroupItem another)
{
return group_id < another.group_id ? -1 : (group_id == another.group_id ? 0 : 1);
}
}
}

Change groupCursor == group to groupCursor.equals(group).
BTW I suggest to load the data in another thread, not in the UI thread and especially not in the getView method, because it can be called LOT of times by the ListView

Related

implementing Admob Native Advanced with RecyclerView but could not get the exact View Types

I already knew how the RecyclerView with different types of view works but this time I'm trying to add the Native Advance Admob ads to my RecyclerView. I followed theseYoutube Tutorials but there was an error printed to my logcat after the app crushed.
Logcat
java.lang.ClassCastException: com.google.android.gms.internal.ads.zzaeh cannot be cast to mgb.com.sdalyricsplus.Database.Entities.SongsEntity
at mgb.com.sdalyricsplus.newAdapters.DisplayItemAdapter.onBindViewHolder(DisplayItemAdapter.java:98)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2303)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1627)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1587)
I reviewed the tutorial many times hoping that I've missed something that causes the error but it seems that I followed the tutorial correctly.
Here are my Codes
DisplayItemActivity
public class DisplayItemActivity extends AppCompatActivity{
public static final int NUMBER_OF_AD = 5;
AdLoader adLoader;
FastScrollRecyclerView recyclerView;
Global global;
RoomViewModel model;
List<Object> recyclerViewItems = new ArrayList<>();
List<UnifiedNativeAd> nativeAds = new ArrayList<>();
DisplayItemAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_songs);
MobileAds.initialize(this,"ca-app-pub-2493911630710964~1147957926");
recyclerView = findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setHasFixedSize(true);
global = (Global)getApplication();
model = ViewModelProviders.of(this).get(RoomViewModel.class);
adapter = new DisplayItemAdapter(getLayoutInflater());
recyclerView.setAdapter(adapter);
recyclerViewItems.addAll(model.selectAll());
loadNativeAds();
}
private void loadNativeAds() {
AdLoader.Builder builder = new AdLoader.Builder(this, getResources().getString(R.string.native_advance));
adLoader = builder.forUnifiedNativeAd(new UnifiedNativeAd.OnUnifiedNativeAdLoadedListener() {
#Override
public void onUnifiedNativeAdLoaded(UnifiedNativeAd unifiedNativeAd) {
nativeAds.add(unifiedNativeAd);
if (!adLoader.isLoading()) {
insertAdToList();
}
}
}).withAdListener(new AdListener() {
#Override
public void onAdFailedToLoad(int i) {
super.onAdFailedToLoad(i);
if (!adLoader.isLoading()) {
insertAdToList();
}
}
}).build();
adLoader.loadAds(new AdRequest.Builder().build(), NUMBER_OF_AD);
}
private void insertAdToList() {
int offset = recyclerViewItems.size() / (nativeAds.size() + 1);
int index = 0;
for (UnifiedNativeAd ad : nativeAds) {
recyclerViewItems.add(index,ad);
index = index + offset;
}
adapter.setList(recyclerViewItems);
}
}
And my Adapter
DisplayItemAdapter
public class DisplayItemAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final int MENU_ITEM_VIEW_TYPE = 0;
private final int UNIFIED_NATIVE_AD_VIEW_TYPE = 1;
private List<Object> recyclerViewItems = new ArrayList<>();
private Global global;
private String searchTxt = "";
private final String newline = System.getProperty("line.separator");
private ClickSongItemListener clickSongItemListener;
private ChangeFavoriteListener changeFavoriteListener;
private LayoutInflater layoutInflater;
public DisplayItemAdapter(LayoutInflater layoutInflater) {
this.layoutInflater = layoutInflater;
}
public void setList(List<Object> list) {
this.recyclerViewItems = list;
notifyDataSetChanged();
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
global = (Global) ((Activity)parent.getContext()).getApplication();
switch (viewType) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
View adView = LayoutInflater.from(parent.getContext()).inflate(R.layout.native_ad_view,parent,false);
return new UnifiedNativeAdViewHolder(adView);
case MENU_ITEM_VIEW_TYPE :
default:
View songitem = LayoutInflater.from(parent.getContext()).inflate(R.layout.gospel_song_item,parent,false);
return new SongItemViewHolder(songitem);
}
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
int viewType = getItemViewType(position);
switch (viewType) {
case UNIFIED_NATIVE_AD_VIEW_TYPE :
UnifiedNativeAdViewHolder nativeAdViewHolder = (UnifiedNativeAdViewHolder)holder;
UnifiedNativeAd unifiedNativeAd = (UnifiedNativeAd) recyclerViewItems.get(position);
// poulateNativeAdView(unifiedNativeAd,((UnifiedNativeAdViewHolder)holder).getAdView());
FrameLayout frameLayout =
nativeAdViewHolder.view.findViewById(R.id.ad_frame_placement);
UnifiedNativeAdView adView = (UnifiedNativeAdView) layoutInflater
.inflate(R.layout.ad_unified, null);
populateUnifiedNativeAdView(unifiedNativeAd, adView);
frameLayout.removeAllViews();
frameLayout.addView(adView);
break;
case MENU_ITEM_VIEW_TYPE :
default:
SongItemViewHolder songItemViewHolder = (SongItemViewHolder)holder;
setSongViews(songItemViewHolder, (SongsEntity)recyclerViewItems.get(position));
}
}
private void populateUnifiedNativeAdView(UnifiedNativeAd nativeAd, UnifiedNativeAdView adView) {
// Set the media view.
adView.setMediaView((MediaView) adView.findViewById(R.id.ad_media));
// Set other ad assets.
adView.setHeadlineView(adView.findViewById(R.id.ad_headline));
adView.setBodyView(adView.findViewById(R.id.ad_body));
adView.setCallToActionView(adView.findViewById(R.id.ad_call_to_action));
adView.setIconView(adView.findViewById(R.id.ad_app_icon));
adView.setPriceView(adView.findViewById(R.id.ad_price));
adView.setStarRatingView(adView.findViewById(R.id.ad_stars));
adView.setStoreView(adView.findViewById(R.id.ad_store));
adView.setAdvertiserView(adView.findViewById(R.id.ad_advertiser));
// The headline and mediaContent are guaranteed to be in every UnifiedNativeAd.
((TextView) adView.getHeadlineView()).setText(nativeAd.getHeadline());
adView.getMediaView().setMediaContent(nativeAd.getMediaContent());
// These assets aren't guaranteed to be in every UnifiedNativeAd, so it's important to
// check before trying to display them.
if (nativeAd.getBody() == null) {
adView.getBodyView().setVisibility(View.INVISIBLE);
} else {
adView.getBodyView().setVisibility(View.VISIBLE);
((TextView) adView.getBodyView()).setText(nativeAd.getBody());
}
if (nativeAd.getCallToAction() == null) {
adView.getCallToActionView().setVisibility(View.INVISIBLE);
} else {
adView.getCallToActionView().setVisibility(View.VISIBLE);
((Button) adView.getCallToActionView()).setText(nativeAd.getCallToAction());
}
if (nativeAd.getIcon() == null) {
adView.getIconView().setVisibility(View.GONE);
} else {
((ImageView) adView.getIconView()).setImageDrawable(
nativeAd.getIcon().getDrawable());
adView.getIconView().setVisibility(View.VISIBLE);
}
if (nativeAd.getPrice() == null) {
adView.getPriceView().setVisibility(View.INVISIBLE);
} else {
adView.getPriceView().setVisibility(View.VISIBLE);
((TextView) adView.getPriceView()).setText(nativeAd.getPrice());
}
if (nativeAd.getStore() == null) {
adView.getStoreView().setVisibility(View.INVISIBLE);
} else {
adView.getStoreView().setVisibility(View.VISIBLE);
((TextView) adView.getStoreView()).setText(nativeAd.getStore());
}
if (nativeAd.getStarRating() == null) {
adView.getStarRatingView().setVisibility(View.INVISIBLE);
} else {
((RatingBar) adView.getStarRatingView())
.setRating(nativeAd.getStarRating().floatValue());
adView.getStarRatingView().setVisibility(View.VISIBLE);
}
if (nativeAd.getAdvertiser() == null) {
adView.getAdvertiserView().setVisibility(View.INVISIBLE);
} else {
((TextView) adView.getAdvertiserView()).setText(nativeAd.getAdvertiser());
adView.getAdvertiserView().setVisibility(View.VISIBLE);
}
// This method tells the Google Mobile Ads SDK that you have finished populating your
// native ad view with this native ad.
adView.setNativeAd(nativeAd);
// Get the video controller for the ad. One will always be provided, even if the ad doesn't
// have a video asset.
VideoController vc = nativeAd.getVideoController();
// Updates the UI to say whether or not this ad has a video asset.
if (vc.hasVideoContent()) {
// videoStatus.setText(String.format(Locale.getDefault(),
// "Video status: Ad contains a %.2f:1 video asset.",
// vc.getAspectRatio()));
// Create a new VideoLifecycleCallbacks object and pass it to the VideoController. The
// VideoController will call methods on this object when events occur in the video
// lifecycle.
vc.setVideoLifecycleCallbacks(new VideoController.VideoLifecycleCallbacks() {
#Override
public void onVideoEnd() {
// Publishers should allow native ads to complete video playback before
// refreshing or replacing them with another ad in the same UI location.
super.onVideoEnd();
}
});
} else {
}
}
private void setSongViews(SongItemViewHolder viewHolder, SongsEntity note) {
Context context = viewHolder.itemView.getContext();
if (note.getMedia_extension().equals("audio")) {
Glide.with(context)
.load(R.drawable.music_icon)
.thumbnail(00.1f)
.into(viewHolder.iv_thumbnail);
}else if (note.getGenre().toLowerCase().contains("karaoke")) {
File file = new File(context.getExternalFilesDir(null)+"/.file"+note.getId());
if (file.exists()) {
Glide.with(context)
.setDefaultRequestOptions(new RequestOptions().placeholder(R.drawable.karaoke_icon))
.load(file)
.thumbnail(00.1f)
.into(viewHolder.iv_thumbnail);
}else {
Glide.with(context)
.setDefaultRequestOptions(new RequestOptions().placeholder(R.drawable.karaoke_icon))
.load(note.getMedia_url())
.thumbnail(00.1f)
.into(viewHolder.iv_thumbnail);
}
}else {
Glide.with(context)
.load(R.drawable.lyrics_icon)
.thumbnail(00.1f)
.into(viewHolder.iv_thumbnail);
}
viewHolder.title.setText(global.capitalize(note.getTitle()));
viewHolder.artist.setText(global.capitalize(note.getArtist()));
viewHolder.category.setText(note.getGenre());
viewHolder.favorite.setOnCheckedChangeListener(null);
viewHolder.favorite.setChecked(note.getFavorites());
viewHolder.views.setText(note.getFavorite_counter() <2 ? note.getFavorite_counter()+" heart" : note.getFavorite_counter()+" hearts");
String MY_ID = "JUntYdabhUh5XtMhfCIXXwNbsdW2";
if (!note.getUploader_id().equals(MY_ID))
Glide.with(context)
.setDefaultRequestOptions(new RequestOptions().placeholder(R.mipmap.sda_logo).diskCacheStrategy(DiskCacheStrategy.ALL))
.load(note.getUploader_photo_url())
.into(viewHolder.user_logo);
else
Glide.with(context)
.load(R.mipmap.sda_logo)
.into(viewHolder.user_logo);
String lyrics = note.getLyrics().toLowerCase();
String searchFilter = searchTxt.toLowerCase();
if (searchTxt.isEmpty()) {
viewHolder.phrase_end.setText(note.getLyrics());
viewHolder.phrase.setText("");
} else
if (lyrics.contains(searchFilter) && (lyrics.indexOf(searchFilter)) + searchTxt.length() <= lyrics.length()) {
viewHolder.phrase.setText(searchTxt);
String filter = note.getLyrics().substring(lyrics.indexOf(searchFilter) + searchFilter.length());
assert newline != null;
viewHolder.phrase_end.setText(filter.replaceAll(newline, " "));
}else {
viewHolder.phrase_end.setText(note.getLyrics());
viewHolder.phrase.setText("");
}
viewHolder.favorite.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (changeFavoriteListener != null) {
changeFavoriteListener.onChange(buttonView.getContext(),note,isChecked);
}
}
});
}
private void poulateNativeAdView(UnifiedNativeAd unifiedNativeAd, UnifiedNativeAdView adView) {
((TextView)adView.getHeadlineView()).setText(unifiedNativeAd.getHeadline());
((TextView)adView.getBodyView()).setText(unifiedNativeAd.getBody());
((TextView)adView.getCallToActionView()).setText(unifiedNativeAd.getCallToAction());
NativeAd.Image icon = unifiedNativeAd.getIcon();
if (icon == null) {
adView.getIconView().setVisibility(View.INVISIBLE);
}else {
((ImageView)adView.getIconView()).setImageDrawable(icon.getDrawable());
adView.getIconView().setVisibility(View.VISIBLE);
}
if (unifiedNativeAd.getPrice() == null) {
adView.getPriceView().setVisibility(View.INVISIBLE);
}else {
adView.getPriceView().setVisibility(View.VISIBLE);
((TextView)adView.getPriceView()).setText(unifiedNativeAd.getPrice());
}
if (unifiedNativeAd.getStore() == null) {
adView.getStoreView().setVisibility(View.INVISIBLE);
}else {
adView.getStoreView().setVisibility(View.VISIBLE);
((TextView)adView.getStoreView()).setText(unifiedNativeAd.getStore());
}
if (unifiedNativeAd.getStarRating() == null) {
adView.getStarRatingView().setVisibility(View.INVISIBLE);
}else {
adView.getStarRatingView().setVisibility(View.VISIBLE);
((RatingBar)adView.getStarRatingView()).setRating(unifiedNativeAd.getStarRating().floatValue());
}
if (unifiedNativeAd.getAdvertiser() == null) {
adView.getAdvertiserView().setVisibility(View.INVISIBLE);
}else {
adView.getAdvertiserView().setVisibility(View.VISIBLE);
((TextView)adView.getAdvertiserView()).setText(unifiedNativeAd.getAdvertiser());
}
adView.setNativeAd(unifiedNativeAd);
}
#Override
public int getItemCount() {
return recyclerViewItems.size();
}
public class SongItemViewHolder extends RecyclerView.ViewHolder {
TextView title, phrase,phrase_end;
TextView artist;
TextView category;
ToggleButton favorite;
LinearLayout layoutWrapper;
LinearLayout phrase_layout;
TextView views;
CircleImageView user_logo;
ImageView iv_thumbnail;
public SongItemViewHolder(#NonNull View itemView) {
super(itemView);
title = itemView.findViewById(R.id.text_view_title);
iv_thumbnail = itemView.findViewById(R.id.iv_thumbnail);
artist = itemView.findViewById(R.id.text_view_artist);
phrase = itemView.findViewById(R.id.phrase);
phrase_end = itemView.findViewById(R.id.phrase_end);
category = itemView.findViewById(R.id.text_view_category);
favorite = itemView.findViewById(R.id.toggleButton_favorite);
layoutWrapper = itemView.findViewById(R.id.layout_wrapper);
phrase_layout = itemView.findViewById(R.id.phrase_layout);
views = itemView.findViewById(R.id.tv_view_status);
user_logo = itemView.findViewById(R.id.user_logo);
}
}
private class UnifiedNativeAdViewHolder extends RecyclerView.ViewHolder {
private View view;
public UnifiedNativeAdViewHolder(View view) {
super(view);
this.view = view;
}
}
}
the logcat says that com.google.android.gms.internal.ads.zzaeh cannot be cast to mgb.com.sdalyricsplus.Database.Entities.SongsEntity and the error was pointed to the viewbindholder
case MENU_ITEM_VIEW_TYPE :
default:
SongItemViewHolder songItemViewHolder = (SongItemViewHolder)holder;
setSongViews(songItemViewHolder, (SongsEntity)recyclerViewItems.get(position)); // this line
my suspect is the viewtype. Maybe the view type was not correctly assigned.
I tried this code also but the error still there.
#Override
public int getItemViewType(int position) {
if (position % DisplayItemActivity.NUMBER_OF_AD == 0) {
return UNIFIED_NATIVE_AD_VIEW_TYPE;
}else {
return MENU_ITEM_VIEW_TYPE;
}
}
can someone help me to find the cause of the error?

You need to merge your SongItem and UnifiedNativeAd to become 1 single data source.
Make a new object class name SongAdsData to merge your Song object and Ads from Admob into 1 single object like below:
public class SongAdsData {
public int getType() {
return type;
}
public UnifiedNativeAd getAds() {
return ads;
}
public Post getSong() {
return Song;
}
public int type; // 1 is ads and 2 is songs
public UnifiedNativeAd ads;
public Song song; // here is ur Song object as usual
}
In your adapter, modify it as below:
public class SongAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int UNIFIED_ADS_VIEW = 1;
private static final int SONG_ITEM_VIEW = 2;
private List<SongAdsData> songAdsDataList;
//here your onBindViewHolder,here your refer to item of `songAdsDataList`
// here your onCreateViewHolder
public void setSongAdsDataList(List<SongAdsData> songAdsDataForRecyclerView) {
this.songAdsDataList = songAdsDataForRecyclerView;
notifyDataSetChanged();
}
// Here is the function that insert the ads to RecyclerView
public void insertAdToRecyclerView(List<UnifiedNativeAds> nativeAds) {
int offset = songAdsDataList.size() / (nativeAds.size() + 1);
int index = 0;
for (UnifiedNativeAd ad : nativeAds) {
SongAdsData adsData = new SongAdsData();
adsData.song = null;
adsData.ads = ad;
adsData.type = 1; //1 for ads,2 for song
songAdsDataList.add(index,adsData);
index = index + offset;
}
notifyDataSetChanged();
}
#Override
public int getItemViewType (int position) {
if(songAdsDataList.get(position).getType() == 1){ // So here you compare the type of the object it the position
return UNIFIED_ADS;
}else{
return SONG_ITEM_VIEW;
}
}
#Override
public int getItemCount() {
if(songAdsDataList != null){
return songAdsDataList.size();
}else{
return 0;
}
}
}
So finally in your DisplayItemActivity
I not sure how you get your SongItem(your data from server or somewhere else),but the idea is transform your SongItem into SongAdsData that we created in the step one,
Example like this:
private void displaySongFromYourServer(List<Songs> songs) {
List<SongAdsData> songAdsDataList = new ArrayList<>();
for(Songs song : songs){
SongAdsData data = new SongAdsData();
data.ads = null;
data.song = song;
data.type = 2;
songAdsDataList.add(data);
}
songAdapter.setSongAdsDataList(songAdsDataList);
}
So by now,your Song item will become SongAdsData. At the same time, your UnifiedNativeAd object also need to transform become SongAdsData, therefore we need to
move all thing inside insertAdToList into SongAdapter(See the insertAdToRecyclerView in Song adapter above),so the it can refer to the same List of the recyclerView.
Therefore in your insertAdToList of DisplayItemActivity should become like this:
private void insertAdToList() {
songAdapter.insertAdsToRecyclerView(nativeAds); //called to the function inside songAdapter.
}
Hope you get the idea.

You need to override getItemViewType(int position) to check the instance of your Object in order to return the right view type:
#Override
public int getItemViewType(int position) {
if (this.recyclerViewItems.get(position) instanceof UnifiedNativeAd) {
return UNIFIED_NATIVE_AD_VIEW_TYPE;
}else {
return MENU_ITEM_VIEW_TYPE;
}
}

How and where exactly need to change to accept normal character search from the accented content without changing the UI android

I am using search filtered list. The list contains accented characters.
If I type Cam, it should support and accept Càm but it's not working. I am clueless where exactly I need to give to work in Adapter class.
Here is the code.
public class MainActivity extends AppCompatActivity {
private HighlightArrayAdapter mHighlightArrayAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Listview sample data
String products[] = {"Càmdoón", "córean", "Lamià", "dell", "HTC One X", "HTC Wildfire S", "HTC Sense", "HTC Sensàtion XE",
"iPhone 4S", "Samsóng Galàxy Note 800",
"Samsung Galàxy S3", "MacBook Air", "Màc Mini", "MàcBook Pro"};
ListView listView = (ListView) findViewById(R.id.listview);
EditText editText = (EditText) findViewById(R.id.inputSearch);
// Adding items to listview
mHighlightArrayAdapter = new HighlightArrayAdapter(this, R.layout.list_item, R.id.product_name, products);
listView.setAdapter(mHighlightArrayAdapter);
// Enabling Search Filter
editText.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
mHighlightArrayAdapter.getFilter().filter(cs);
}
#Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
}
#Override
public void afterTextChanged(Editable arg0) {
}
});
}
}
//HighlightArrayAdapter.
public class HighlightArrayAdapter extends ArrayAdapter<String> {
private final LayoutInflater mInflater;
private final Context mContext;
private final int mResource;
private List<String> mObjects;
private int mFieldId = 0;
private ArrayList<String> mOriginalValues;
private ArrayFilter mFilter;
private final Object mLock = new Object();
private String mSearchText; // this var for highlight
Pattern mPattern;
public HighlightArrayAdapter(Context context, int resource, int textViewResourceId, String[] objects) {
super(context, resource, textViewResourceId, objects);
mContext = context;
mInflater = LayoutInflater.from(context);
mResource = resource;
mObjects = Arrays.asList(objects);
mFieldId = textViewResourceId;
}
#Override
public Context getContext() {
return mContext;
}
#Override
public int getCount() {
return mObjects.size();
}
#Override
public String getItem(int position) {
return mObjects.get(position);
}
#Override
public int getPosition(String item) {
return mObjects.indexOf(item);
}
#Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ArrayFilter();
}
return mFilter;
}
private class ArrayFilter extends Filter {
#Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
if (mOriginalValues == null) {
synchronized (mLock) {
mOriginalValues = new ArrayList<>(mObjects);
}
}
if (prefix == null || prefix.length() == 0) {
mSearchText = "";
ArrayList<String> list;
synchronized (mLock) {
list = new ArrayList<>(mOriginalValues);
}
results.values = list;
results.count = list.size();
} else {
String prefixString = prefix.toString().toLowerCase();
mSearchText = prefixString;
ArrayList<String> values;
synchronized (mLock) {
values = new ArrayList<>(mOriginalValues);
}
final int count = values.size();
final ArrayList<String> newValues = new ArrayList<>();
for (int i = 0; i < count; i++) {
final String value = values.get(i);
final String valueText = value.toLowerCase();
// First match against the whole, non-splitted value
if (valueText.startsWith(prefixString) || valueText.contains(prefixString)) {
newValues.add(value);
} else {
final String[] words = valueText.split(" ");
final int wordCount = words.length;
// Start at index 0, in case valueText starts with space(s)
for (int k = 0; k < wordCount; k++) {
if (words[k].startsWith(prefixString) || words[k].contains(prefixString)) {
newValues.add(value);
break;
}
}
}
}
results.values = newValues;
results.count = newValues.size();
}
return results;
}
#Override
protected void publishResults(CharSequence constraint, FilterResults results) {
//noinspection unchecked
mObjects = (List<String>) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
TextView text;
if (convertView == null) {
view = mInflater.inflate(mResource, parent, false);
} else {
view = convertView;
}
try {
if (mFieldId == 0) {
// If no custom field is assigned, assume the whole resource is a TextView
text = (TextView) view;
} else {
// Otherwise, find the TextView field within the layout
text = (TextView) view.findViewById(mFieldId);
}
} catch (ClassCastException e) {
Log.e("ArrayAdapter", "You must supply a resource ID for a TextView");
throw new IllegalStateException(
"ArrayAdapter requires the resource ID to be a TextView", e);
}
// HIGHLIGHT...
String fullText = getItem(position);
if (mSearchText != null && !mSearchText.isEmpty()) {
int startPos = fullText.toLowerCase(Locale.US).indexOf(mSearchText.toLowerCase(Locale.US));
int endPos = startPos + mSearchText.length();
if (startPos != -1) {
//Spannable spannable = new SpannableString(removeAccents(fullText)); // i used removeAccents but not worked.
Spannable spannable = new SpannableString(fullText);
ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE});
TextAppearanceSpan highlightSpan = new TextAppearanceSpan(null, Typeface.BOLD, -1, blueColor, null);
spannable.setSpan(highlightSpan, startPos, endPos, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
text.setText(spannable);
} else {
text.setText(fullText);
}
} else {
text.setText(fullText);
}
return view;
}
/* public static String removeAccents(String text) {
return text == null ? null : Normalizer.normalize(text, Normalizer.Form.NFD)
.replaceAll("\\p{InCombiningDiacriticalMarks}+", "");
}*/
/*private SpannableStringBuilder createHighlightedString(String nodeText, int highlightColor) {
SpannableStringBuilder returnValue = new SpannableStringBuilder(nodeText);
String lowercaseNodeText = nodeText.toLowerCase();
Matcher matcher = mSearchText.matcher(lowercaseNodeText);
while (matcher.find()) {
returnValue.setSpan(new ForegroundColorSpan(highlightColor), matcher.start(0),
matcher.end(0), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
}
return returnValue;
}*/
}
Here is the screenshot.
Scenario 1: (This is working)
Scenario 2: ( This is not working when I type normal character of a):
Scenario 3: (This is working when I type accented character):
So how to make Scenario 2 to work when I give normal character search in word to support the accented character list to accept.
I used InCombiningDiacriticalMarks but it's not working i am clueless where exactly need to give.
Kindly help me please in adapter class.

You should match your filtered list to a diactritics-less String.
public static String removeDiacritics(String input) {
String out = "" + input;
out = out.replaceAll(" ", "");
out = out.replaceAll("[èéêë]", "e");
out = out.replaceAll("[ûù]", "u");
out = out.replaceAll("[ïî]", "i");
out = out.replaceAll("[àâ]", "a");
out = out.replaceAll("Ô", "o");
out = out.replaceAll("[ÈÉÊË]", "E");
out = out.replaceAll("[ÛÙ]", "U");
out = out.replaceAll("[ÏÎ]", "I");
out = out.replaceAll("[ÀÂ]", "A");
out = out.replaceAll("Ô", "O");
out = out.replaceAll("-", "");
return out;
}
This way you will not be matching "Cam" with "Càm" anymore, but "Cam" with "Cam". You should also transform your strings to lower (or upper) case to be Upper-case permissive.
hope it helps!

how to use native admob ads inside recyclerview with resourcecursoradapter ((without replace any data items))

I trying to add admob native ads in recyclerview that uses resourcecursoradapter adapter .. the issues is
1 - it makes app crash
2 - it replaces recyclerview data item with admob ads
that is my code
public class EntriesCursorAdapter extends ResourceCursorAdapter {
private final Uri mUri;
private final boolean mShowFeedInfo;
private int mIdPos, mTitlePos, mMainImgPos, mDatePos, mIsReadPos, mFavoritePos, mFeedIdPos, mFeedNamePos;
public static final int Ads_view_type = 11;
public EntriesCursorAdapter(Context context, Uri uri, Cursor cursor, boolean showFeedInfo) {
super(context, PrefUtils.getInt(PrefUtils.NEWS_FORMAT_int,R.layout.item_entry_list2), cursor, 0);
mUri = uri;
mShowFeedInfo = showFeedInfo;
reinit(cursor);
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
final int position = cursor.getPosition();
final int viewtype = getItemViewType(position);
View itemView ;
if(viewtype == Ads_view_type) {
final LayoutInflater inflater = LayoutInflater.from(context);
itemView = inflater.inflate(R.layout.native_ads, parent, false);
if (itemView.getTag(R.id.holder) == null) {
AdsHolder ads_holder = new AdsHolder();
ads_holder.adView = (NativeExpressAdView) itemView.findViewById(R.id.adView2);
itemView.setTag(R.id.holder, ads_holder);
} return itemView;
}
else {
final LayoutInflater inflater = LayoutInflater.from(context);
itemView = inflater.inflate(PrefUtils.getInt(PrefUtils.NEWS_FORMAT_int, R.layout.item_entry_list2), parent, false);
if (itemView.getTag(R.id.holder) == null) {
ViewHolder holder = new ViewHolder();
holder.titleTextView = (TextView) itemView.findViewById(android.R.id.text1);
holder.dateTextView = (TextView) itemView.findViewById(android.R.id.text2);
holder.mainImgView = (ImageView) itemView.findViewById(R.id.main_icon);
holder.starImgView = (ImageView) itemView.findViewById(R.id.favorite_icon);
itemView.setTag(R.id.holder, holder);
}
return itemView;
}
}
#Override
public int getItemViewType(int position) {
if(position % 6 ==0)
{return Ads_view_type;}
else {
return super.getItemViewType(position);
}
}
#Override
public void bindView(View view, final Context context, Cursor cursor) {
final int position = cursor.getPosition();
final int viewtype = getItemViewType(position);
if (viewtype == Ads_view_type) {
try {
AdsHolder adsHolder = (AdsHolder) view.getTag(R.id.holder);
AdRequest request = new AdRequest.Builder()
.addTestDevice("ca-app-pub-5647351014779121/8591922893")
.build();
adsHolder.adView.loadAd(request);
} catch (Exception e) {
}
} else {
try {
ViewHolder holder = (ViewHolder) view.getTag(R.id.holder);
String titleText = cursor.getString(mTitlePos);
holder.titleTextView.setText(titleText);
final long feedId = cursor.getLong(mFeedIdPos);
String feedName = cursor.getString(mFeedNamePos);
String mainImgUrl = cursor.getString(mMainImgPos);
mainImgUrl = TextUtils.isEmpty(mainImgUrl) ? null : NetworkUtils.getDownloadedOrDistantImageUrl(cursor.getLong(mIdPos), mainImgUrl);
ColorGenerator generator = ColorGenerator.DEFAULT;
int color = generator.getColor(feedId); // The color is specific to the feedId (which shouldn't change)
String lettersForName = feedName != null ? (feedName.length() < 2 ? feedName.toUpperCase() : feedName.substring(0, 2).toUpperCase()) : "";
TextDrawable letterDrawable = TextDrawable.builder().buildRect(lettersForName, color);
if (mainImgUrl != null) {
Glide.with(context).load(mainImgUrl).centerCrop().placeholder(letterDrawable).error(letterDrawable).into(holder.mainImgView);
} else {
Glide.clear(holder.mainImgView);
holder.mainImgView.setImageDrawable(letterDrawable);
}
holder.isFavorite = cursor.getInt(mFavoritePos) == 1;
holder.starImgView.setVisibility(holder.isFavorite ? View.VISIBLE : View.INVISIBLE);
if (mShowFeedInfo && mFeedNamePos > -1) {
if (feedName != null) {
holder.dateTextView.setText(Html.fromHtml("<font color='#247ab0'>" + feedName + "</font>" + Constants.COMMA_SPACE + StringUtils.getDateTimeString(cursor.getLong(mDatePos))));
} else {
holder.dateTextView.setText(StringUtils.getDateTimeString(cursor.getLong(mDatePos)));
}
} else {
holder.dateTextView.setText(StringUtils.getDateTimeString(cursor.getLong(mDatePos)));
}
if (cursor.isNull(mIsReadPos)) {
holder.titleTextView.setEnabled(true);
holder.dateTextView.setEnabled(true);
holder.isRead = false;
} else {
holder.titleTextView.setEnabled(false);
holder.dateTextView.setEnabled(false);
holder.isRead = true;
}
} catch (Exception e) {}
}
}
public void toggleReadState(final long id, View view) {
final ViewHolder holder = (ViewHolder) view.getTag(R.id.holder);
if (holder != null) { // should not happen, but I had a crash with this on PlayStore...
holder.isRead = !holder.isRead;
if (holder.isRead) {
holder.titleTextView.setEnabled(false);
holder.dateTextView.setEnabled(false);
} else {
holder.titleTextView.setEnabled(true);
holder.dateTextView.setEnabled(true);
}
new Thread() {
#Override
public void run() {
ContentResolver cr = MainApplication.getContext().getContentResolver();
Uri entryUri = ContentUris.withAppendedId(mUri, id);
cr.update(entryUri, holder.isRead ? FeedData.getReadContentValues() : FeedData.getUnreadContentValues(), null, null);
}
}.start();
}
}
public void toggleFavoriteState(final long id, View view) {
final ViewHolder holder = (ViewHolder) view.getTag(R.id.holder);
if (holder != null) { // should not happen, but I had a crash with this on PlayStore...
holder.isFavorite = !holder.isFavorite;
if (holder.isFavorite) {
holder.starImgView.setVisibility(View.VISIBLE);
} else {
holder.starImgView.setVisibility(View.INVISIBLE);
}
new Thread() {
#Override
public void run() {
ContentValues values = new ContentValues();
values.put(EntryColumns.IS_FAVORITE, holder.isFavorite ? 1 : 0);
ContentResolver cr = MainApplication.getContext().getContentResolver();
Uri entryUri = ContentUris.withAppendedId(mUri, id);
cr.update(entryUri, values, null, null);
}
}.start();
}
}
#Override
public void changeCursor(Cursor cursor) {
reinit(cursor);
super.changeCursor(cursor);
}
#Override
public Cursor swapCursor(Cursor newCursor) {
reinit(newCursor);
return super.swapCursor(newCursor);
}
#Override
public void notifyDataSetChanged() {
reinit(null);
super.notifyDataSetChanged();
}
#Override
public void notifyDataSetInvalidated() {
reinit(null);
super.notifyDataSetInvalidated();
}
private void reinit(Cursor cursor) {
if (cursor != null && cursor.getCount() > 0) {
mIdPos = cursor.getColumnIndex(EntryColumns._ID);
mTitlePos = cursor.getColumnIndex(EntryColumns.TITLE);
mMainImgPos = cursor.getColumnIndex(EntryColumns.IMAGE_URL);
mDatePos = cursor.getColumnIndex(EntryColumns.DATE);
mIsReadPos = cursor.getColumnIndex(EntryColumns.IS_READ);
mFavoritePos = cursor.getColumnIndex(EntryColumns.IS_FAVORITE);
mFeedNamePos = cursor.getColumnIndex(FeedColumns.NAME);
mFeedIdPos = cursor.getColumnIndex(EntryColumns.FEED_ID);
}
}
private static class ViewHolder {
public TextView titleTextView;
public TextView dateTextView;
public ImageView mainImgView;
public ImageView starImgView;
public boolean isRead, isFavorite;
}
private static class AdsHolder {
NativeExpressAdView adView;
}
}

Ho to change ListView items count?

I have a ListView with the sections. And when there is a section, then it takes the place of another. That is, if the ListView items count 30, the section takes the place of the first paragraph, and it turns out that the show only 29 points.
Here is a picture, which shows clearly
Tried TYPE_MAX_COUNT = 2, 3. Without confusing.
#Override
public int getViewTypeCount() {
return TYPE_MAX_COUNT;
}
I think getViewTypeCount() is triggered after getView().
private List<VacancyModel> vacancyModelList;
private LayoutInflater inflater;
private SQLHelper sqlHelper;
private static final int TYPE_SEPARATOR = 1;
private static final int TYPE_ITEM = 0;
private int rowType;
public static String saveLastDate;
private int newRecs = 0;
public SuitableAdapter(Context context, int resource, List<VacancyModel> objects) {
super(context, resource, objects);
vacancyModelList = objects;
sqlHelper = new SQLHelper(getContext());
inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#NonNull
#Override
public View getView(final int position, View convertView, #NonNull final ViewGroup parent) {
ViewHolder holder = null;
rowType = getItemViewType(position);
if (convertView == null) {
holder = new ViewHolder();
switch (rowType) {
case TYPE_SEPARATOR:
convertView = inflater.inflate(R.layout.suitable_separator_layout, null);
holder.headerTv = (TextView) convertView.findViewById(R.id.section_header);
break;
case TYPE_ITEM:
convertView = inflater.inflate(R.layout.row_layout, null);
holder.tvProfession = (TextView) convertView.findViewById(R.id.tvProfession);
holder.tvHeader = (TextView) convertView.findViewById(R.id.tvHeader);
holder.tvSalary = (TextView) convertView.findViewById(R.id.tvSalary);
holder.tvDate = (TextView) convertView.findViewById(R.id.tvPostCr);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (getItemViewType(position) == TYPE_SEPARATOR) {
holder.headerTv = (TextView) convertView.findViewById(R.id.section_header);
if (newRecs == 1) {
holder.headerTv.setText("Новые вакансии");
newRecs = 0;
} else {
holder.headerTv.setText("Ранее просмотренные");
}
}
if (getItemViewType(position) == TYPE_ITEM) {
final VacancyModel model = vacancyModelList.get(position);
holder.tvProfession.setText(model.getProfession());
holder.tvHeader.setText(model.getHeader());
holder.tvSalary.setText(model.getSalary());
holder.tvDate.setText(model.getDate());
Date date;
try {
if (saveLastDate == null) {
saveLastDate = model.getDate();
} else {
date = stringToDate(saveLastDate);
if (date.before(stringToDate(model.getDate()))) {
saveLastDate = model.getDate();
}
}
} catch (ParseException e) {
e.printStackTrace();
}
}
return convertView;
}
#Override
public int getItemViewType(int position) {
if (GlobalData.LoadDate(getContext()) == null) {
return TYPE_ITEM;
} else {
VacancyModel model = getItem(position);
if (model != null) {
String newString = model.getDate();
String lastString = GlobalData.LoadDate(getContext());
Date newDate = null;
Date lastDate = null;
try {
newDate = stringToDate(newString);
lastDate = stringToDate(lastString);
} catch (ParseException e) {
e.printStackTrace();
}
assert newDate != null;
if (newDate.equals(lastDate)) {
return TYPE_SEPARATOR;
} else if (position == 0 && newDate.after(lastDate)) {
newRecs = 1;
return TYPE_SEPARATOR;
} else {
return TYPE_ITEM;
}
} else {
return TYPE_ITEM;
}
}
}
#Override
public int getViewTypeCount() {
return 3;
}
#Override
public int getCount() {
return vacancyModelList.size();
}
private Date stringToDate(String string) throws ParseException {
return new SimpleDateFormat(("yyyy-MM-dd HH:mm:ss"), Locale.getDefault()).parse(string);
}
private static class ViewHolder {
private TextView tvProfession;
private TextView tvHeader;
private TextView tvSalary;
private TextView tvDate;
private TextView headerTv;
}
VacancyModel
public class VacancyModel implements Serializable{
private String profession;
private String header;
private String salary;
private String date;
public VacancyModel() {
}
public String getProfession() {
return profession;
}
public void setProfession(String profession) {
this.profession = profession;
}
public String getHeader() {
return header;
}
public void setHeader(String header) {
this.header = header;
}
public String getSalary() {
if (salary.equals("0") || salary.isEmpty() || salary.equals("null")){
return "empty";
}
else {
return salary;
}
}
public void setSalary(String salary) {
this.salary = salary;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
}
Question: What I am doing wrong and how to change ListView`s count?

The listItem you are sending in should have the type field as well. So what I am suggesting is instead of doing date check manipulation inside listview. you can do it prior before adding data to RecyclerView.
Adding two more Field to your Serializable Data:
public class VacancyModel implements Serializable{
private String profession;
private String header;
private String salary;
private String date;
// set setter and getter for both, by default isHeading will be false,
private boolean isHeading;
private String heading;
public VacancyModel() {
}
public String getProfession() {
return profession;
}
public void setProfession(String profession) {
this.profession = profession;
}
public String getHeader() {
return header;
}
public void setHeader(String header) {
this.header = header;
}
public String getSalary() {
if (salary.equals("0") || salary.isEmpty() || salary.equals("null")){
return "empty";
}
else {
return salary;
}
}
public void setSalary(String salary) {
this.salary = salary;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
}
Do the following thing inside your activity inside activity:
private void generateListHeading(List<VacancyModel> original_vacany_list)
{
List<VacancyModel> vacancy_type_new_record;
VacancyModel model = new vacacyModel();
model.setIsHeading(true);
model.setHeading("New Record");
vacancy_type_new_record.add(model);
List<VacancyModel> vacancy_type_watched;
model = new vacacyModel();
model.setIsHeading(true);
model.setHeading("Watched");
vacancy_type_watched.add(model);
List<VacancyModel> new_vacancy_list;
for(VacanyModel data:original_vacany_list)
{
//do your date condition check here
if(data.getDate==newDate)
{
vacancy_type_new_record.add(data)
} else
{
vacancy_type_watched.add(data)
}
}
//once the whole condition check is add both list to new list
new_vacancy_list.addAll(vacancy_type_new_record);
new_vacancy_list.addAll(vacancy_type_watched);
//now the item count will be 32. in the format heading ,data ,heading,data
adapter.setUpdateddata(new_vacancy_list);
}
Adapter.class:
vacanyModelList = new ArrayList<>();
public SuitableAdapter(Context context, int resource) {
super(context, resource, objects);
//don't set your object in constructor
sqlHelper = new SQLHelper(getContext());
inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#NonNull
#Override
public View getView(final int position, View convertView, #NonNull final ViewGroup parent) {
ViewHolder holder = null;
rowType = getItemViewType(position);
if (convertView == null) {
holder = new ViewHolder();
switch (rowType) {
case TYPE_SEPARATOR:
convertView = inflater.inflate(R.layout.suitable_separator_layout, null);
holder.headerTv = (TextView) convertView.findViewById(R.id.section_header);
break;
case TYPE_ITEM:
convertView = inflater.inflate(R.layout.row_layout, null);
holder.tvProfession = (TextView) convertView.findViewById(R.id.tvProfession);
holder.tvHeader = (TextView) convertView.findViewById(R.id.tvHeader);
holder.tvSalary = (TextView) convertView.findViewById(R.id.tvSalary);
holder.tvDate = (TextView) convertView.findViewById(R.id.tvPostCr);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (getItemViewType(position) == TYPE_SEPARATOR) {
holder.headerTv = (TextView) convertView.findViewById(R.id.section_header);
if (newRecs == 1) {
holder.headerTv.setText("Новые вакансии");
newRecs = 0;
} else {
holder.headerTv.setText("Ранее просмотренные");
}
}
if (getItemViewType(position) == TYPE_ITEM) {
final VacancyModel model = vacancyModelList.get(position);
holder.tvProfession.setText(model.getProfession());
holder.tvHeader.setText(model.getHeader());
holder.tvSalary.setText(model.getSalary());
holder.tvDate.setText(model.getDate());
Date date;
try {
if (saveLastDate == null) {
saveLastDate = model.getDate();
} else {
date = stringToDate(saveLastDate);
if (date.before(stringToDate(model.getDate()))) {
saveLastDate = model.getDate();
}
}
} catch (ParseException e) {
e.printStackTrace();
}
}
return convertView;
}
#Override
public int getItemViewType(int position) {
VacancyModel model = getItem(position);
if (model.isHeading) {
return TYPE_SEPARATOR;
} else {
return TYPE_ITEM;
}
}
}
#Override
public int getViewTypeCount() {
return 2;
}
#Override
public int getCount() {
return vacancyModelList.size();
}
private Date stringToDate(String string) throws ParseException {
return new SimpleDateFormat(("yyyy-MM-dd HH:mm:ss"), Locale.getDefault()).parse(string);
}
private static class ViewHolder {
private TextView tvProfession;
private TextView tvHeader;
private TextView tvSalary;
private TextView tvDate;
private TextView headerTv;
}
public void setUpdatedData(List<VacancyModel> updated_list)
{
this.vacancyModelList = updated_list;
notifyDataSetChanged();
}

Android - NullPointerException SimpleAdapter - Pinned section ListView?

I created a ListView with pinned which works well once. But when I arrive latest item of ListView crashes on me and says NullPointerException.
I need that when I arrive latest item get next 5 of items .
MainActivity.java :
public class PinnedSectionListActivity extends ListActivity implements OnClickListener {
public static Context context;
public static Context _context;
public static SQLiteDatabase sql;
public Cursor cursor;
public Cursor cursorA;
public boolean flag = false;
public Integer count = 0;
public List<Items> result;
public List<ItemsT> resultT;
static class SimpleAdapter extends ArrayAdapter<Item> implements PinnedSectionListView.PinnedSectionListAdapter {
private List<Items> Results;
private List<ItemsT> ResultsT;
private Integer counts;
private static final int[] COLORS = new int[] {
R.color.green_light, R.color.orange_light,
R.color.blue_light, R.color.red_light };
public SimpleAdapter(Context context,List<Items> MResults,List<ItemsT> MresultT,Integer count , int resource, int textViewResourceId) {
super(context, resource, textViewResourceId);
this.Results = MResults;
this.ResultsT = MresultT;
this.counts = count;
generateDataset(false);
}
public void generateDataset(boolean clear) {
int y = 0;
if (clear) clear();
prepareSections(counts);
int sectionPosition = 0, listPosition = 0;
for (char i=0; i<counts; i++) {
final Items ci = Results.get(i);
Item section = new Item(Item.SECTION, ci.WTitleO);
section.sectionPosition = sectionPosition;
section.listPosition = listPosition++;
onSectionAdded(section, sectionPosition);
add(section);
for (int j=0;j<ci.count;j++) {
final ItemsT xx = ResultsT.get(y);
Item item = new Item(Item.ITEM, xx.WTitleT);
item.sectionPosition = sectionPosition;
item.listPosition = listPosition++;
y++;
add(item);
}
sectionPosition++;
}
}
protected void prepareSections(int sectionsNumber) { }
protected void onSectionAdded(Item section, int sectionPosition) { }
#Override public View getView(int position, View convertView, ViewGroup parent) {
TextView view = (TextView) super.getView(position, convertView, parent);
view.setTextColor(Color.DKGRAY);
view.setTag("" + position);
Item item = getItem(position);
if (item.type == Item.SECTION) {
view.setBackgroundColor(parent.getResources().getColor(COLORS[item.sectionPosition % COLORS.length]));
}
return view;
}
#Override public int getViewTypeCount() {
return 2;
}
#Override public int getItemViewType(int position) {
return getItem(position).type;
}
#Override
public boolean isItemViewTypePinned(int viewType) {
return viewType == Item.SECTION;
}
}
static class Items {
public int conO ;
public String WTitleO;
public int count;
}
static class ItemsT {
public String WTitleT;
}
static class Item {
public static final int ITEM = 0;
public static final int SECTION = 1;
public final int type;
public final String text;
public int sectionPosition;
public int listPosition;
public Item(int type, String text) {
this.type = type;
this.text = text;
}
#Override public String toString() {
return text;
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
_context = this;
DB db = new DB(context);
db.CreateFile();
try {
db.CreateandOpenDataBase();
} catch (IOException e) {
e.printStackTrace();
}
sql = db.openDataBase();
test();
}
public void test(){
result = new ArrayList<Items>();
resultT = new ArrayList<ItemsT>();
try {
cursor = sql.rawQuery("SELECT (select count() as number from WebSite_BookPageDB22 as b where b.ParentID = a.ContentID) as count" +
" ,ContentID,Title" +
" FROM WebSite_BookPageDB22 as a" +
" WHERE ArticleID = '" + 61799 + "' AND ParentID = '" + 0 + "'order by PageID ASC LIMIT 5", null);
if (cursor != null) {
if (cursor.moveToFirst()) {
do {
Items ci = new Items();
ci.conO = cursor.getInt(cursor.getColumnIndex("ContentID"));
ci.WTitleO = cursor.getString(cursor.getColumnIndex("Title"));
ci.count = cursor.getInt(cursor.getColumnIndex("count"));
if(flag == false) {
count = cursor.getCount();
flag = true;
}
cursorA = sql.rawQuery("select Title from WebSite_BookPageDB22 where ParentID = '" + ci.conO +"' order by PageID ASC", null);
try {
if (cursorA != null && cursorA.moveToFirst()) {
do {
ItemsT cty = new ItemsT();
cty.WTitleT = cursorA.getString(cursorA.getColumnIndex("Title"));
resultT.add(cty);
} while (cursorA.moveToNext());
}
}catch (Exception e){
Log.i("xxx", "You have an error");
}finally {
if (cursorA != null) {
cursorA.close();
}
}
result.add(ci);
} while (cursor.moveToNext());
}
}
} catch (Exception e) {
} finally {
cursor.close();
}
SimpleAdapter adapt = new SimpleAdapter(_context, result, resultT, count, android.R.layout.simple_list_item_1, android.R.id.text1);
setListAdapter(adapt);
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Item item = (Item) getListView().getAdapter().getItem(position);
if (item != null) {
Toast.makeText(this, "Item " + position + ": " + item.text, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Item " + position, Toast.LENGTH_SHORT).show();
}
}
#Override
public void onClick(View v) {
Toast.makeText(this, "Item: " + v.getTag() , Toast.LENGTH_SHORT).show();
}
}
And PinnedSectionListView.java :
public class PinnedSectionListView extends ListView {
//-- inner classes
/** List adapter to be implemented for being used with PinnedSectionListView adapter. */
public static interface PinnedSectionListAdapter extends ListAdapter {
/** This method shall return 'true' if views of given type has to be pinned. */
boolean isItemViewTypePinned(int viewType);
}
/** Wrapper class for pinned section view and its position in the list. */
static class PinnedSection {
public View view;
public int position;
public long id;
}
//-- class fields
// fields used for handling touch events
private final Rect mTouchRect = new Rect();
private final PointF mTouchPoint = new PointF();
private int mTouchSlop;
private View mTouchTarget;
private MotionEvent mDownEvent;
// fields used for drawing shadow under a pinned section
private GradientDrawable mShadowDrawable;
private int mSectionsDistanceY;
private int mShadowHeight;
/** Delegating listener, can be null. */
OnScrollListener mDelegateOnScrollListener;
/** Shadow for being recycled, can be null. */
PinnedSection mRecycleSection;
/** shadow instance with a pinned view, can be null. */
PinnedSection mPinnedSection;
/** Pinned view Y-translation. We use it to stick pinned view to the next section. */
int mTranslateY;
/** Scroll listener which does the magic */
private final OnScrollListener mOnScrollListener = new OnScrollListener() {
#Override public void onScrollStateChanged(AbsListView view, int scrollState) {
if (mDelegateOnScrollListener != null) { // delegate
mDelegateOnScrollListener.onScrollStateChanged(view, scrollState);
}
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (mDelegateOnScrollListener != null) { // delegate
mDelegateOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
if(firstVisibleItem+visibleItemCount == totalItemCount && totalItemCount!=0)
{
PinnedSectionListActivity xx = new PinnedSectionListActivity();
xx.flag = false;
xx.test();
/*Intent refresh = new Intent(PinnedSectionListActivity._context, PinnedSectionListActivity.class);
PinnedSectionListActivity._context.startActivity(refresh);*/
}
// get expected adapter or fail fast
ListAdapter adapter = getAdapter();
if (adapter == null || visibleItemCount == 0) return; // nothing to do
final boolean isFirstVisibleItemSection =
isItemViewTypePinned(adapter, adapter.getItemViewType(firstVisibleItem));
if (isFirstVisibleItemSection) {
View sectionView = getChildAt(0);
if (sectionView.getTop() == getPaddingTop()) { // view sticks to the top, no need for pinned shadow
destroyPinnedShadow();
} else { // section doesn't stick to the top, make sure we have a pinned shadow
ensureShadowForPosition(firstVisibleItem, firstVisibleItem, visibleItemCount);
}
} else { // section is not at the first visible position
int sectionPosition = findCurrentSectionPosition(firstVisibleItem);
if (sectionPosition > -1) { // we have section position
ensureShadowForPosition(sectionPosition, firstVisibleItem, visibleItemCount);
} else { // there is no section for the first visible item, destroy shadow
destroyPinnedShadow();
}
}
};
};
/** Default change observer. */
private final DataSetObserver mDataSetObserver = new DataSetObserver() {
#Override public void onChanged() {
recreatePinnedShadow();
};
#Override public void onInvalidated() {
recreatePinnedShadow();
}
};
//-- constructors
public PinnedSectionListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView();
}
public PinnedSectionListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initView();
}
private void initView() {
setOnScrollListener(mOnScrollListener);
mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
initShadow(true);
}
//-- public API methods
public void setShadowVisible(boolean visible) {
initShadow(visible);
if (mPinnedSection != null) {
View v = mPinnedSection.view;
invalidate(v.getLeft(), v.getTop(), v.getRight(), v.getBottom() + mShadowHeight);
}
}
//-- pinned section drawing methods
public void initShadow(boolean visible) {
if (visible) {
if (mShadowDrawable == null) {
mShadowDrawable = new GradientDrawable(Orientation.TOP_BOTTOM,
new int[] { Color.parseColor("#ffa0a0a0"), Color.parseColor("#50a0a0a0"), Color.parseColor("#00a0a0a0")});
mShadowHeight = (int) (8 * getResources().getDisplayMetrics().density);
}
} else {
if (mShadowDrawable != null) {
mShadowDrawable = null;
mShadowHeight = 0;
}
}
}
/** Create shadow wrapper with a pinned view for a view at given position */
void createPinnedShadow(int position) {
// try to recycle shadow
PinnedSection pinnedShadow = mRecycleSection;
mRecycleSection = null;
// create new shadow, if needed
if (pinnedShadow == null) pinnedShadow = new PinnedSection();
// request new view using recycled view, if such
View pinnedView = getAdapter().getView(position, pinnedShadow.view, PinnedSectionListView.this);
// read layout parameters
LayoutParams layoutParams = (LayoutParams) pinnedView.getLayoutParams();
if (layoutParams == null) {
layoutParams = (LayoutParams) generateDefaultLayoutParams();
pinnedView.setLayoutParams(layoutParams);
}
int heightMode = MeasureSpec.getMode(layoutParams.height);
int heightSize = MeasureSpec.getSize(layoutParams.height);
if (heightMode == MeasureSpec.UNSPECIFIED) heightMode = MeasureSpec.EXACTLY;
int maxHeight = getHeight() - getListPaddingTop() - getListPaddingBottom();
if (heightSize > maxHeight) heightSize = maxHeight;
// measure & layout
int ws = MeasureSpec.makeMeasureSpec(getWidth() - getListPaddingLeft() - getListPaddingRight(), MeasureSpec.EXACTLY);
int hs = MeasureSpec.makeMeasureSpec(heightSize, heightMode);
pinnedView.measure(ws, hs);
pinnedView.layout(0, 0, pinnedView.getMeasuredWidth(), pinnedView.getMeasuredHeight());
mTranslateY = 0;
// initialize pinned shadow
pinnedShadow.view = pinnedView;
pinnedShadow.position = position;
pinnedShadow.id = getAdapter().getItemId(position);
// store pinned shadow
mPinnedSection = pinnedShadow;
}
/** Destroy shadow wrapper for currently pinned view */
void destroyPinnedShadow() {
if (mPinnedSection != null) {
// keep shadow for being recycled later
mRecycleSection = mPinnedSection;
mPinnedSection = null;
}
}
/** Makes sure we have an actual pinned shadow for given position. */
void ensureShadowForPosition(int sectionPosition, int firstVisibleItem, int visibleItemCount) {
if (visibleItemCount < 2) { // no need for creating shadow at all, we have a single visible item
destroyPinnedShadow();
return;
}
if (mPinnedSection != null
&& mPinnedSection.position != sectionPosition) { // invalidate shadow, if required
destroyPinnedShadow();
}
if (mPinnedSection == null) { // create shadow, if empty
createPinnedShadow(sectionPosition);
}
// align shadow according to next section position, if needed
int nextPosition = sectionPosition + 1;
if (nextPosition < getCount()) {
int nextSectionPosition = findFirstVisibleSectionPosition(nextPosition,
visibleItemCount - (nextPosition - firstVisibleItem));
if (nextSectionPosition > -1) {
View nextSectionView = getChildAt(nextSectionPosition - firstVisibleItem);
final int bottom = mPinnedSection.view.getBottom() + getPaddingTop();
mSectionsDistanceY = nextSectionView.getTop() - bottom;
if (mSectionsDistanceY < 0) {
// next section overlaps pinned shadow, move it up
mTranslateY = mSectionsDistanceY;
} else {
// next section does not overlap with pinned, stick to top
mTranslateY = 0;
}
} else {
// no other sections are visible, stick to top
mTranslateY = 0;
mSectionsDistanceY = Integer.MAX_VALUE;
}
}
}
int findFirstVisibleSectionPosition(int firstVisibleItem, int visibleItemCount) {
ListAdapter adapter = getAdapter();
int adapterDataCount = adapter.getCount();
if (getLastVisiblePosition() >= adapterDataCount) return -1; // dataset has changed, no candidate
if (firstVisibleItem+visibleItemCount >= adapterDataCount){//added to prevent index Outofbound (in case)
visibleItemCount = adapterDataCount-firstVisibleItem;
}
for (int childIndex = 0; childIndex < visibleItemCount; childIndex++) {
int position = firstVisibleItem + childIndex;
int viewType = adapter.getItemViewType(position);
if (isItemViewTypePinned(adapter, viewType)) return position;
}
return -1;
}
int findCurrentSectionPosition(int fromPosition) {
ListAdapter adapter = getAdapter();
if (fromPosition >= adapter.getCount()) return -1; // dataset has changed, no candidate
if (adapter instanceof SectionIndexer) {
// try fast way by asking section indexer
SectionIndexer indexer = (SectionIndexer) adapter;
int sectionPosition = indexer.getSectionForPosition(fromPosition);
int itemPosition = indexer.getPositionForSection(sectionPosition);
int typeView = adapter.getItemViewType(itemPosition);
if (isItemViewTypePinned(adapter, typeView)) {
return itemPosition;
} // else, no luck
}
// try slow way by looking through to the next section item above
for (int position=fromPosition; position>=0; position--) {
int viewType = adapter.getItemViewType(position);
if (isItemViewTypePinned(adapter, viewType)) return position;
}
return -1; // no candidate found
}
void recreatePinnedShadow() {
destroyPinnedShadow();
ListAdapter adapter = getAdapter();
if (adapter != null && adapter.getCount() > 0) {
int firstVisiblePosition = getFirstVisiblePosition();
int sectionPosition = findCurrentSectionPosition(firstVisiblePosition);
if (sectionPosition == -1) return; // no views to pin, exit
ensureShadowForPosition(sectionPosition,
firstVisiblePosition, getLastVisiblePosition() - firstVisiblePosition);
}
}
#Override
public void setOnScrollListener(OnScrollListener listener) {
if (listener == mOnScrollListener) {
super.setOnScrollListener(listener);
} else {
mDelegateOnScrollListener = listener;
}
}
#Override
public void onRestoreInstanceState(Parcelable state) {
super.onRestoreInstanceState(state);
post(new Runnable() {
#Override public void run() { // restore pinned view after configuration change
recreatePinnedShadow();
}
});
}
#Override
public void setAdapter(ListAdapter adapter) {
// assert adapter in debug mode
if (BuildConfig.DEBUG && adapter != null) {
if (!(adapter instanceof PinnedSectionListAdapter))
throw new IllegalArgumentException("Does your adapter implement PinnedSectionListAdapter?");
if (adapter.getViewTypeCount() < 2)
throw new IllegalArgumentException("Does your adapter handle at least two types" +
" of views in getViewTypeCount() method: items and sections?");
}
// unregister observer at old adapter and register on new one
ListAdapter oldAdapter = getAdapter();
if (oldAdapter != null) oldAdapter.unregisterDataSetObserver(mDataSetObserver);
if (adapter != null) adapter.registerDataSetObserver(mDataSetObserver);
// destroy pinned shadow, if new adapter is not same as old one
if (oldAdapter != adapter) destroyPinnedShadow();
super.setAdapter(adapter);
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if (mPinnedSection != null) {
int parentWidth = r - l - getPaddingLeft() - getPaddingRight();
int shadowWidth = mPinnedSection.view.getWidth();
if (parentWidth != shadowWidth) {
recreatePinnedShadow();
}
}
}
#Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
if (mPinnedSection != null) {
// prepare variables
int pLeft = getListPaddingLeft();
int pTop = getListPaddingTop();
View view = mPinnedSection.view;
// draw child
canvas.save();
int clipHeight = view.getHeight() +
(mShadowDrawable == null ? 0 : Math.min(mShadowHeight, mSectionsDistanceY));
canvas.clipRect(pLeft, pTop, pLeft + view.getWidth(), pTop + clipHeight);
canvas.translate(pLeft, pTop + mTranslateY);
drawChild(canvas, mPinnedSection.view, getDrawingTime());
if (mShadowDrawable != null && mSectionsDistanceY > 0) {
mShadowDrawable.setBounds(mPinnedSection.view.getLeft(),
mPinnedSection.view.getBottom(),
mPinnedSection.view.getRight(),
mPinnedSection.view.getBottom() + mShadowHeight);
mShadowDrawable.draw(canvas);
}
canvas.restore();
}
}
//-- touch handling methods
#Override
public boolean dispatchTouchEvent(MotionEvent ev) {
final float x = ev.getX();
final float y = ev.getY();
final int action = ev.getAction();
if (action == MotionEvent.ACTION_DOWN
&& mTouchTarget == null
&& mPinnedSection != null
&& isPinnedViewTouched(mPinnedSection.view, x, y)) { // create touch target
// user touched pinned view
mTouchTarget = mPinnedSection.view;
mTouchPoint.x = x;
mTouchPoint.y = y;
// copy down event for eventually be used later
mDownEvent = MotionEvent.obtain(ev);
}
if (mTouchTarget != null) {
if (isPinnedViewTouched(mTouchTarget, x, y)) { // forward event to pinned view
mTouchTarget.dispatchTouchEvent(ev);
}
if (action == MotionEvent.ACTION_UP) { // perform onClick on pinned view
super.dispatchTouchEvent(ev);
performPinnedItemClick();
clearTouchTarget();
} else if (action == MotionEvent.ACTION_CANCEL) { // cancel
clearTouchTarget();
} else if (action == MotionEvent.ACTION_MOVE) {
if (Math.abs(y - mTouchPoint.y) > mTouchSlop) {
// cancel sequence on touch target
MotionEvent event = MotionEvent.obtain(ev);
event.setAction(MotionEvent.ACTION_CANCEL);
mTouchTarget.dispatchTouchEvent(event);
event.recycle();
// provide correct sequence to super class for further handling
super.dispatchTouchEvent(mDownEvent);
super.dispatchTouchEvent(ev);
clearTouchTarget();
}
}
return true;
}
// call super if this was not our pinned view
return super.dispatchTouchEvent(ev);
}
private boolean isPinnedViewTouched(View view, float x, float y) {
view.getHitRect(mTouchRect);
// by taping top or bottom padding, the list performs on click on a border item.
// we don't add top padding here to keep behavior consistent.
mTouchRect.top += mTranslateY;
mTouchRect.bottom += mTranslateY + getPaddingTop();
mTouchRect.left += getPaddingLeft();
mTouchRect.right -= getPaddingRight();
return mTouchRect.contains((int)x, (int)y);
}
private void clearTouchTarget() {
mTouchTarget = null;
if (mDownEvent != null) {
mDownEvent.recycle();
mDownEvent = null;
}
}
private boolean performPinnedItemClick() {
if (mPinnedSection == null) return false;
OnItemClickListener listener = getOnItemClickListener();
if (listener != null && getAdapter().isEnabled(mPinnedSection.position)) {
View view = mPinnedSection.view;
playSoundEffect(SoundEffectConstants.CLICK);
if (view != null) {
view.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
}
listener.onItemClick(this, view, mPinnedSection.position, mPinnedSection.id);
return true;
}
return false;
}
public static boolean isItemViewTypePinned(ListAdapter adapter, int viewType) {
if (adapter instanceof HeaderViewListAdapter) {
adapter = ((HeaderViewListAdapter)adapter).getWrappedAdapter();
}
return ((PinnedSectionListAdapter) adapter).isItemViewTypePinned(viewType);
}
}
For second time get me error here :
SimpleAdapter adapt = new SimpleAdapter(_context, result, resultT, count, android.R.layout.simple_list_item_1, android.R.id.text1);
setListAdapter(adapt);

Your not using PinnedSectionListActivity current reference properly,If you wan to access your current public function inside any other class then you have to pass your current activity reference :
Declaration
private Context context;
Get current activity reference
public PinnedSectionListView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
initView();
}
public PinnedSectionListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.context = context;
initView();
}
Use current activity reference in onScroll() :
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (mDelegateOnScrollListener != null) { // delegate
mDelegateOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
if(firstVisibleItem+visibleItemCount == totalItemCount && totalItemCount!=0)
{
if(context!=null){
((PinnedSectionListActivity)context).cleans();
}
}else {
// get expected adapter or fail fast
ListAdapter adapter = getAdapter();
if (adapter == null || visibleItemCount == 0) return; // nothing to do
final boolean isFirstVisibleItemSection = isItemViewTypePinned(adapter, adapter.getItemViewType(firstVisibleItem));
if (isFirstVisibleItemSection) {
View sectionView = getChildAt(0);
if (sectionView.getTop() == getPaddingTop()) { // view sticks to the top, no need for pinned shadow
destroyPinnedShadow();
} else { // section doesn't stick to the top, make sure we have a pinned shadow
ensureShadowForPosition(firstVisibleItem, firstVisibleItem, visibleItemCount);
}
} else { // section is not at the first visible position
int sectionPosition = findCurrentSectionPosition(firstVisibleItem);
if (sectionPosition > -1) { // we have section position
ensureShadowForPosition(sectionPosition, firstVisibleItem, visibleItemCount);
} else { // there is no section for the first visible item, destroy shadow
destroyPinnedShadow();
}
}
}
};
PinnedSectionListView full activity code :
public class PinnedSectionListView extends ListView {
//-- inner classes
/** List adapter to be implemented for being used with PinnedSectionListView adapter. */
public static interface PinnedSectionListAdapter extends ListAdapter {
/** This method shall return 'true' if views of given type has to be pinned. */
boolean isItemViewTypePinned(int viewType);
}
/** Wrapper class for pinned section view and its position in the list. */
static class PinnedSection {
public View view;
public int position;
public long id;
}
//-- class fields
// fields used for handling touch events
private final Rect mTouchRect = new Rect();
private final PointF mTouchPoint = new PointF();
private int mTouchSlop;
private View mTouchTarget;
private MotionEvent mDownEvent;
// fields used for drawing shadow under a pinned section
private GradientDrawable mShadowDrawable;
private int mSectionsDistanceY;
private int mShadowHeight;
/** Delegating listener, can be null. */
OnScrollListener mDelegateOnScrollListener;
/** Shadow for being recycled, can be null. */
PinnedSection mRecycleSection;
/** shadow instance with a pinned view, can be null. */
PinnedSection mPinnedSection;
/** Pinned view Y-translation. We use it to stick pinned view to the next section. */
int mTranslateY;
private Context context;
/** Scroll listener which does the magic */
private final OnScrollListener mOnScrollListener = new OnScrollListener() {
#Override public void onScrollStateChanged(AbsListView view, int scrollState) {
if (mDelegateOnScrollListener != null) { // delegate
mDelegateOnScrollListener.onScrollStateChanged(view, scrollState);
}
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (mDelegateOnScrollListener != null) { // delegate
mDelegateOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
if(firstVisibleItem+visibleItemCount == totalItemCount && totalItemCount!=0)
{
if(context!=null){
((PinnedSectionListActivity)context).cleans();
}
}else {
// get expected adapter or fail fast
ListAdapter adapter = getAdapter();
if (adapter == null || visibleItemCount == 0) return; // nothing to do
final boolean isFirstVisibleItemSection = isItemViewTypePinned(adapter, adapter.getItemViewType(firstVisibleItem));
if (isFirstVisibleItemSection) {
View sectionView = getChildAt(0);
if (sectionView.getTop() == getPaddingTop()) { // view sticks to the top, no need for pinned shadow
destroyPinnedShadow();
} else { // section doesn't stick to the top, make sure we have a pinned shadow
ensureShadowForPosition(firstVisibleItem, firstVisibleItem, visibleItemCount);
}
} else { // section is not at the first visible position
int sectionPosition = findCurrentSectionPosition(firstVisibleItem);
if (sectionPosition > -1) { // we have section position
ensureShadowForPosition(sectionPosition, firstVisibleItem, visibleItemCount);
} else { // there is no section for the first visible item, destroy shadow
destroyPinnedShadow();
}
}
}
};
};
/** Default change observer. */
private final DataSetObserver mDataSetObserver = new DataSetObserver() {
#Override public void onChanged() {
recreatePinnedShadow();
};
#Override public void onInvalidated() {
recreatePinnedShadow();
}
};
//-- constructors
public PinnedSectionListView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
initView();
}
public PinnedSectionListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.context = context;
initView();
}
private void initView() {
setOnScrollListener(mOnScrollListener);
mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
initShadow(true);
}
//-- public API methods
public void setShadowVisible(boolean visible) {
initShadow(visible);
if (mPinnedSection != null) {
View v = mPinnedSection.view;
invalidate(v.getLeft(), v.getTop(), v.getRight(), v.getBottom() + mShadowHeight);
}
}
//-- pinned section drawing methods
public void initShadow(boolean visible) {
if (visible) {
if (mShadowDrawable == null) {
mShadowDrawable = new GradientDrawable(Orientation.TOP_BOTTOM,
new int[] { Color.parseColor("#ffa0a0a0"), Color.parseColor("#50a0a0a0"), Color.parseColor("#00a0a0a0")});
mShadowHeight = (int) (8 * getResources().getDisplayMetrics().density);
}
} else {
if (mShadowDrawable != null) {
mShadowDrawable = null;
mShadowHeight = 0;
}
}
}
/** Create shadow wrapper with a pinned view for a view at given position */
void createPinnedShadow(int position) {
// try to recycle shadow
PinnedSection pinnedShadow = mRecycleSection;
mRecycleSection = null;
// create new shadow, if needed
if (pinnedShadow == null) pinnedShadow = new PinnedSection();
// request new view using recycled view, if such
View pinnedView = getAdapter().getView(position, pinnedShadow.view, PinnedSectionListView.this);
// read layout parameters
LayoutParams layoutParams = (LayoutParams) pinnedView.getLayoutParams();
if (layoutParams == null) {
layoutParams = (LayoutParams) generateDefaultLayoutParams();
pinnedView.setLayoutParams(layoutParams);
}
int heightMode = MeasureSpec.getMode(layoutParams.height);
int heightSize = MeasureSpec.getSize(layoutParams.height);
if (heightMode == MeasureSpec.UNSPECIFIED) heightMode = MeasureSpec.EXACTLY;
int maxHeight = getHeight() - getListPaddingTop() - getListPaddingBottom();
if (heightSize > maxHeight) heightSize = maxHeight;
// measure & layout
int ws = MeasureSpec.makeMeasureSpec(getWidth() - getListPaddingLeft() - getListPaddingRight(), MeasureSpec.EXACTLY);
int hs = MeasureSpec.makeMeasureSpec(heightSize, heightMode);
pinnedView.measure(ws, hs);
pinnedView.layout(0, 0, pinnedView.getMeasuredWidth(), pinnedView.getMeasuredHeight());
mTranslateY = 0;
// initialize pinned shadow
pinnedShadow.view = pinnedView;
pinnedShadow.position = position;
pinnedShadow.id = getAdapter().getItemId(position);
// store pinned shadow
mPinnedSection = pinnedShadow;
}
/** Destroy shadow wrapper for currently pinned view */
void destroyPinnedShadow() {
if (mPinnedSection != null) {
// keep shadow for being recycled later
mRecycleSection = mPinnedSection;
mPinnedSection = null;
}
}
/** Makes sure we have an actual pinned shadow for given position. */
void ensureShadowForPosition(int sectionPosition, int firstVisibleItem, int visibleItemCount) {
if (visibleItemCount < 2) { // no need for creating shadow at all, we have a single visible item
destroyPinnedShadow();
return;
}
if (mPinnedSection != null
&& mPinnedSection.position != sectionPosition) { // invalidate shadow, if required
destroyPinnedShadow();
}
if (mPinnedSection == null) { // create shadow, if empty
createPinnedShadow(sectionPosition);
}
// align shadow according to next section position, if needed
int nextPosition = sectionPosition + 1;
if (nextPosition < getCount()) {
int nextSectionPosition = findFirstVisibleSectionPosition(nextPosition,
visibleItemCount - (nextPosition - firstVisibleItem));
if (nextSectionPosition > -1) {
View nextSectionView = getChildAt(nextSectionPosition - firstVisibleItem);
final int bottom = mPinnedSection.view.getBottom() + getPaddingTop();
mSectionsDistanceY = nextSectionView.getTop() - bottom;
if (mSectionsDistanceY < 0) {
// next section overlaps pinned shadow, move it up
mTranslateY = mSectionsDistanceY;
} else {
// next section does not overlap with pinned, stick to top
mTranslateY = 0;
}
} else {
// no other sections are visible, stick to top
mTranslateY = 0;
mSectionsDistanceY = Integer.MAX_VALUE;
}
}
}
int findFirstVisibleSectionPosition(int firstVisibleItem, int visibleItemCount) {
ListAdapter adapter = getAdapter();
int adapterDataCount = adapter.getCount();
if (getLastVisiblePosition() >= adapterDataCount) return -1; // dataset has changed, no candidate
if (firstVisibleItem+visibleItemCount >= adapterDataCount){//added to prevent index Outofbound (in case)
visibleItemCount = adapterDataCount-firstVisibleItem;
}
for (int childIndex = 0; childIndex < visibleItemCount; childIndex++) {
int position = firstVisibleItem + childIndex;
int viewType = adapter.getItemViewType(position);
if (isItemViewTypePinned(adapter, viewType)) return position;
}
return -1;
}
int findCurrentSectionPosition(int fromPosition) {
ListAdapter adapter = getAdapter();
if (fromPosition >= adapter.getCount()) return -1; // dataset has changed, no candidate
if (adapter instanceof SectionIndexer) {
// try fast way by asking section indexer
SectionIndexer indexer = (SectionIndexer) adapter;
int sectionPosition = indexer.getSectionForPosition(fromPosition);
int itemPosition = indexer.getPositionForSection(sectionPosition);
int typeView = adapter.getItemViewType(itemPosition);
if (isItemViewTypePinned(adapter, typeView)) {
return itemPosition;
} // else, no luck
}
// try slow way by looking through to the next section item above
for (int position=fromPosition; position>=0; position--) {
int viewType = adapter.getItemViewType(position);
if (isItemViewTypePinned(adapter, viewType)) return position;
}
return -1; // no candidate found
}
void recreatePinnedShadow() {
destroyPinnedShadow();
ListAdapter adapter = getAdapter();
if (adapter != null && adapter.getCount() > 0) {
int firstVisiblePosition = getFirstVisiblePosition();
int sectionPosition = findCurrentSectionPosition(firstVisiblePosition);
if (sectionPosition == -1) return; // no views to pin, exit
ensureShadowForPosition(sectionPosition,
firstVisiblePosition, getLastVisiblePosition() - firstVisiblePosition);
}
}
#Override
public void setOnScrollListener(OnScrollListener listener) {
if (listener == mOnScrollListener) {
super.setOnScrollListener(listener);
} else {
mDelegateOnScrollListener = listener;
}
}
#Override
public void onRestoreInstanceState(Parcelable state) {
super.onRestoreInstanceState(state);
post(new Runnable() {
#Override public void run() { // restore pinned view after configuration change
recreatePinnedShadow();
}
});
}
#Override
public void setAdapter(ListAdapter adapter) {
// assert adapter in debug mode
if (BuildConfig.DEBUG && adapter != null) {
if (!(adapter instanceof PinnedSectionListAdapter))
throw new IllegalArgumentException("Does your adapter implement PinnedSectionListAdapter?");
if (adapter.getViewTypeCount() < 2)
throw new IllegalArgumentException("Does your adapter handle at least two types" +
" of views in getViewTypeCount() method: items and sections?");
}
// unregister observer at old adapter and register on new one
ListAdapter oldAdapter = getAdapter();
if (oldAdapter != null) oldAdapter.unregisterDataSetObserver(mDataSetObserver);
if (adapter != null) adapter.registerDataSetObserver(mDataSetObserver);
// destroy pinned shadow, if new adapter is not same as old one
if (oldAdapter != adapter) destroyPinnedShadow();
super.setAdapter(adapter);
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if (mPinnedSection != null) {
int parentWidth = r - l - getPaddingLeft() - getPaddingRight();
int shadowWidth = mPinnedSection.view.getWidth();
if (parentWidth != shadowWidth) {
recreatePinnedShadow();
}
}
}
#Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
if (mPinnedSection != null) {
// prepare variables
int pLeft = getListPaddingLeft();
int pTop = getListPaddingTop();
View view = mPinnedSection.view;
// draw child
canvas.save();
int clipHeight = view.getHeight() +
(mShadowDrawable == null ? 0 : Math.min(mShadowHeight, mSectionsDistanceY));
canvas.clipRect(pLeft, pTop, pLeft + view.getWidth(), pTop + clipHeight);
canvas.translate(pLeft, pTop + mTranslateY);
drawChild(canvas, mPinnedSection.view, getDrawingTime());
if (mShadowDrawable != null && mSectionsDistanceY > 0) {
mShadowDrawable.setBounds(mPinnedSection.view.getLeft(),
mPinnedSection.view.getBottom(),
mPinnedSection.view.getRight(),
mPinnedSection.view.getBottom() + mShadowHeight);
mShadowDrawable.draw(canvas);
}
canvas.restore();
}
}
//-- touch handling methods
#Override
public boolean dispatchTouchEvent(MotionEvent ev) {
final float x = ev.getX();
final float y = ev.getY();
final int action = ev.getAction();
if (action == MotionEvent.ACTION_DOWN
&& mTouchTarget == null
&& mPinnedSection != null
&& isPinnedViewTouched(mPinnedSection.view, x, y)) { // create touch target
// user touched pinned view
mTouchTarget = mPinnedSection.view;
mTouchPoint.x = x;
mTouchPoint.y = y;
// copy down event for eventually be used later
mDownEvent = MotionEvent.obtain(ev);
}
if (mTouchTarget != null) {
if (isPinnedViewTouched(mTouchTarget, x, y)) { // forward event to pinned view
mTouchTarget.dispatchTouchEvent(ev);
}
if (action == MotionEvent.ACTION_UP) { // perform onClick on pinned view
super.dispatchTouchEvent(ev);
performPinnedItemClick();
clearTouchTarget();
} else if (action == MotionEvent.ACTION_CANCEL) { // cancel
clearTouchTarget();
} else if (action == MotionEvent.ACTION_MOVE) {
if (Math.abs(y - mTouchPoint.y) > mTouchSlop) {
// cancel sequence on touch target
MotionEvent event = MotionEvent.obtain(ev);
event.setAction(MotionEvent.ACTION_CANCEL);
mTouchTarget.dispatchTouchEvent(event);
event.recycle();
// provide correct sequence to super class for further handling
super.dispatchTouchEvent(mDownEvent);
super.dispatchTouchEvent(ev);
clearTouchTarget();
}
}
return true;
}
// call super if this was not our pinned view
return super.dispatchTouchEvent(ev);
}
private boolean isPinnedViewTouched(View view, float x, float y) {
view.getHitRect(mTouchRect);
// by taping top or bottom padding, the list performs on click on a border item.
// we don't add top padding here to keep behavior consistent.
mTouchRect.top += mTranslateY;
mTouchRect.bottom += mTranslateY + getPaddingTop();
mTouchRect.left += getPaddingLeft();
mTouchRect.right -= getPaddingRight();
return mTouchRect.contains((int)x, (int)y);
}
private void clearTouchTarget() {
mTouchTarget = null;
if (mDownEvent != null) {
mDownEvent.recycle();
mDownEvent = null;
}
}
private boolean performPinnedItemClick() {
if (mPinnedSection == null) return false;
OnItemClickListener listener = getOnItemClickListener();
if (listener != null && getAdapter().isEnabled(mPinnedSection.position)) {
View view = mPinnedSection.view;
playSoundEffect(SoundEffectConstants.CLICK);
if (view != null) {
view.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
}
listener.onItemClick(this, view, mPinnedSection.position, mPinnedSection.id);
return true;
}
return false;
}
public static boolean isItemViewTypePinned(ListAdapter adapter, int viewType) {
if (adapter instanceof HeaderViewListAdapter) {
adapter = ((HeaderViewListAdapter)adapter).getWrappedAdapter();
}
return ((PinnedSectionListAdapter) adapter).isItemViewTypePinned(viewType);
}
}

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