I'm trying to refresh the list view when I click on a single item of the list view.
For example I'm trying to do something like this:
public class RssItemsAdapter extends ArrayAdapter<Item> {
private TextView txtTitle;
private ImageView imgFavourite;
private int resourceId;
private Context context;
private List<Item> items = new ArrayList<Item>();
public RssItemsAdapter(Context context, int resourceId, List<Item> items)
{
super(context, resourceId, items);
this.context = context;
this.items = items;
this.resourceId = resourceId;
}
#Override
public int getCount() {
return items.size();
}
#Override
public Item getItem(int index) {
return items.get(index);
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
View row = convertView;
Item item = getItem(position);
if (row == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(resourceId, parent, false);
}
txtTitle = (TextView) row.findViewById(R.id.title);
txtTitle.setText(item.getTitle());
imgFavourite = (ImageView) row.findViewById(R.id.favourite);
imgFavourite.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (item.isFavourite() == true) {
imgFavourite.setBackgroundResource(android.R.drawable.btn_star_big_off);
}
else {
imgFavourite.setBackgroundResource(android.R.drawable.btn_star_big_on);
}
}
});
// add a "star" icon on favourite items
if (item.isFavourite() == true)
imgFavourite.setBackgroundResource(android.R.drawable.btn_star_big_on);
else
imgFavourite.setBackgroundResource(android.R.drawable.btn_star_big_off);
return row;
}
Every time I click on the imgFavourite icon it should change. Where is the problem?
It doesn't look like you are ever changing the value of item.isFavourite(). Assuming you want to toggle when that item is clicked...
imgFavourite.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Toggle the current state
item.setIsFavourite(!item.isFavourite());
if (item.isFavourite() == true) {
imgFavourite.setBackgroundResource(android.R.drawable.btn_star_big_off);
}
else {
imgFavourite.setBackgroundResource(android.R.drawable.btn_star_big_on);
}
}
});
Also, you should be doing this kind of work in the ListView's onItemClickListsner. As is, this will create a new onClickListener each time a new row is brought into view. Beyond that, check into the "view holder pattern".
Related
I have a problem using folding cell library from the RAMOTION
I have implemented everything but I am facing a problem with the list view
I have a list of planets and when user tap on let's say Jupiter the view gets unfolded and more information is visible to the user and when user tap on the same view which is seeing then the view gets folded
Problem
if the user scrolls down the list and then scroll back up and come back up to Jupiter the view remains unfolded and it is happening to all the view.
I appreciate if anyone helps me out
folding state
here
unfolding state
here
AdapterClass
#SuppressWarnings({"WeakerAccess", "unused"})
public class SolarSystemFoldingCellListAdapter extends ArrayAdapter<SolarSystemItemFoldingCell> {
private HashSet<Integer> unfoldedIndexes = new HashSet<>();
private View.OnClickListener defaultRequestBtnClickListener;
private int incomingPosition ;
public SolarSystemFoldingCellListAdapter(Context context, List<SolarSystemItemFoldingCell> objects) {
super(context, 0, objects);
}
#NonNull
#Override
public View getView(int position, View convertView, #NonNull ViewGroup parent) {
// get item for selected view
SolarSystemItemFoldingCell solarSystemItemFoldingCell = getItem(position);
// if cell is exists - reuse it, if not - create the new one from resource
FoldingCell cell = (FoldingCell) convertView;
final ViewHolder viewHolder;
if (cell == null) {
viewHolder = new ViewHolder();
LayoutInflater vi = LayoutInflater.from(getContext());
cell = (FoldingCell) vi.inflate(R.layout.solar_system_folding_cell, parent, false);
// binding view parts to view holder
viewHolder.foldingCell = cell.findViewById(R.id.folding_cell);
viewHolder.relativeLayoutFolded = cell.findViewById(R.id.relativeLayoutFolded);
viewHolder.linearLayoutFolded = cell.findViewById(R.id.linearLayoutFolded);
viewHolder.planetOrStarNameFolded = cell.findViewById(R.id.planetOrStarNameFolded);
viewHolder.mass = cell.findViewById(R.id.mass);
viewHolder.actualMass = cell.findViewById(R.id.actualMass);
viewHolder.distance = cell.findViewById(R.id.distance);
viewHolder.actualDistance = cell.findViewById(R.id.actualDistance);
viewHolder.diameter = cell.findViewById(R.id.diameter);
viewHolder.actualDiameter = cell.findViewById(R.id.actualDiameter);
viewHolder.speed = cell.findViewById(R.id.speed);
viewHolder.actualSpeed = cell.findViewById(R.id.actualSpeed);
viewHolder.moreInfoButton = cell.findViewById(R.id.button);
viewHolder.frameLayoutUnfolded = cell.findViewById(R.id.frameLayoutUnfolded);
viewHolder.planetOrStarNameUnfolded = cell.findViewById(R.id.planetOrStarNameUnfolded);
cell.setTag(viewHolder);
} else {
// for existing cell set valid valid state(without animation)
if (unfoldedIndexes.contains(position)) {
cell.unfold(true);
} else {
cell.fold(true);
}
viewHolder = (ViewHolder) cell.getTag();
}
if (null == solarSystemItemFoldingCell)
return cell;
// bind data from selected element to view through view holder
viewHolder.planetOrStarNameFolded.setText(solarSystemItemFoldingCell.getPlantOrStarNameFolded());
viewHolder.actualMass.setText(solarSystemItemFoldingCell.getActualMass());
viewHolder.actualDistance.setText(solarSystemItemFoldingCell.getActualDistance());
viewHolder.actualDiameter.setText(solarSystemItemFoldingCell.getActualDiameter());
viewHolder.actualSpeed.setText(solarSystemItemFoldingCell.getActualSpeed());
viewHolder.planetOrStarNameUnfolded.setText(String.valueOf(solarSystemItemFoldingCell.getPlanetOrStarNameUnfolded()));
//setting Fonts
viewHolder.planetOrStarNameFolded.setTypeface(App.getAppInstance().getArvoBold());
viewHolder.mass.setTypeface(App.getAppInstance().getArvoBold());
viewHolder.distance.setTypeface(App.getAppInstance().getArvoBold());
viewHolder.diameter.setTypeface(App.getAppInstance().getArvoBold());
viewHolder.speed.setTypeface(App.getAppInstance().getArvoBold());
viewHolder.actualMass.setTypeface(App.getAppInstance().getArvoRegular());
viewHolder.actualDistance.setTypeface(App.getAppInstance().getArvoRegular());
viewHolder.actualDiameter.setTypeface(App.getAppInstance().getArvoRegular());
viewHolder.actualSpeed.setTypeface(App.getAppInstance().getArvoRegular());
viewHolder.moreInfoButton.setTypeface(App.getAppInstance().getArvoRegular());
// set custom btn handler for list item from that item
if (solarSystemItemFoldingCell.getRequestBtnClickListener() != null) {
viewHolder.moreInfoButton.setOnClickListener(solarSystemItemFoldingCell.getRequestBtnClickListener());
} else {
// (optionally) add "default" handler if no handler found in item
viewHolder.moreInfoButton.setOnClickListener(defaultRequestBtnClickListener);
}
viewHolder.relativeLayoutFolded.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getContext(), "Something gets clicked", Toast.LENGTH_SHORT).show();
viewHolder.foldingCell.fold(false);
registerFold(incomingPosition);
}
});
return cell;
}
// simple methods for register cell state changes
public void registerToggle(int position) {
if (unfoldedIndexes.contains(position)) {
registerFold(position);
incomingPosition = position;
}else
registerUnfold(position);
}
public void registerFold(int position) {
unfoldedIndexes.remove(position);
}
public void registerUnfold(int position) {
unfoldedIndexes.add(position);
}
public View.OnClickListener getDefaultRequestBtnClickListener() {
return defaultRequestBtnClickListener;
}
public void setDefaultRequestBtnClickListener(View.OnClickListener defaultRequestBtnClickListener) {
this.defaultRequestBtnClickListener = defaultRequestBtnClickListener;
}
// View lookup cache
private static class ViewHolder {
RelativeLayout relativeLayoutFolded ;
LinearLayout linearLayoutFolded ;
TextView planetOrStarNameFolded;
TextView mass;
TextView actualMass;
TextView distance;
TextView actualDistance;
TextView diameter;
TextView actualDiameter;
TextView speed;
TextView actualSpeed ;
Button moreInfoButton ;
FrameLayout frameLayoutUnfolded ;
TextView planetOrStarNameUnfolded;
FoldingCell foldingCell ;
}
}
SolarSystemClass
private void listViewIntegration (){
arrayList = addingDataIntoList();
solarSystemFoldingCellListAdapter = new SolarSystemFoldingCellListAdapter(SolarSystem.this , arrayList);
listView.setAdapter(solarSystemFoldingCellListAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
int duration = 500; //miliseconds
int offset = 0; //fromListTop
listView.smoothScrollToPositionFromTop(position,offset,duration);
// toggle clicked cell state
((FoldingCell) view).toggle(false);
// register in adapter that state for selected cell is toggled
solarSystemFoldingCellListAdapter.registerToggle(position);
// listView.smoothScrollToPosition(position);
}
});
}
I have a RecyclerView.Adapter which has some Arrays there.
ArrayList with Strings and ArrayList with Integer. Strings are like url and Integer is the photo.
When the app is open for first time the first item is selected.
I have another method for click which makes another item as selected and this works, but the problem is that the first item stays as selected and so for every image click makes as selected, I want only one item to be selected and take a color.
This is my code.
Adapter of RecyclerView
public class ListViewAdapter extends RecyclerView.Adapter<ListViewAdapter.ViewHolder>{
private int selectedItem;
private ArrayList<Integer> mImages = new ArrayList<>();
private ArrayList<String> mSearchUrl = new ArrayList<>();
private Context mContext;
public ListViewAdapter(ArrayList<Integer> images, ArrayList<String> SearchUrl, Context context) {
mImages = images;
mContext = context;
mSearchUrl = SearchUrl;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.s_engine_item, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final ViewHolder viewHolder, final int i) {
selectedItem = 0;
if (selectedItem == i) {
viewHolder.image.setBackgroundColor(Color.parseColor("#30000000"));
}
Glide.with(mContext).load(mImages.get(i))
.into(viewHolder.image);
viewHolder.searchUrl.setText(mSearchUrl.get(i));
viewHolder.image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
viewHolder.image.setBackgroundColor(Color.parseColor("#30000000"));
selectedItem = i;
}
});
}
#Override
public int getItemCount() {
return mImages.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
ImageView image;
TextView searchUrl;
public ViewHolder(#NonNull View itemView) {
super(itemView);
image = itemView.findViewById(R.id.ivEngine);
searchUrl = itemView.findViewById(R.id.ivEngineText);
}
}
}
And this is the MainActivity.class
public void intSearch() {
mImages.add(R.drawable.s_bing);
mSearchUrl.add("https://www.bing.com/search?q=");
mImages.add(R.drawable.s_google);
mSearchUrl.add("https://www.google.com/search?q=");
mImages.add(R.drawable.s_yahoo);
mSearchUrl.add("www.yahoo.com");
mImages.add(R.drawable.amazon_white256);
mSearchUrl.add("www.amazon.com");
mImages.add(R.drawable.amazon_white256);
mSearchUrl.add("www.amazon.com");
mImages.add(R.drawable.amazon_white256);
mSearchUrl.add("www.amazon.com");
initRecyclerView();
}
private void initRecyclerView() {
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
RecyclerView recyclerView = findViewById(R.id.lvEngines);
recyclerView.setLayoutManager(layoutManager);
ListViewAdapter adapter = new ListViewAdapter(mImages, mSearchUrl, this);
recyclerView.setAdapter(adapter);
}
Initialize your selected item globally
public class ListViewAdapter extends RecyclerView.Adapter<ListViewAdapter.ViewHolder>{
private int selectedItem = 0;
.....
Then inside your onBindViewHolder whenever you click a new Image notify your adapter for changes in the last selected item cell.
viewHolder.image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int previousSelectedItem = selectedItem;
selectedItem = i;
notifyItemChanged(previousSelectedItem);
viewHolder.image.setBackgroundColor(Color.parseColor("#30000000"));
}
});
Just remove this line from onBindViewHolder
selectedItem = 0;
and add an else to the background condition, like:
if (selectedItem == i) {
viewHolder.image.setBackgroundColor(Color.parseColor("#30000000"));
}else{
viewHolder.image.setBackgroundColor(“YOUR_DEFAULT_COLOR”);
}
and update the onClick:
viewHolder.image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
selectedItem = i;
notifyDataSetChanged();
}
});
Hi I m using below code where when user touches the textview , list will be updated and touched list row will be in front of user.
public class AppAdapter extends BaseAdapter {
private LayoutInflater layoutInflater;
private List<AppList> listStorage;
private Context context;
SharedPreferences.Editor editor;
SharedPreferences sharedPreferences;
int pos = 0;
public AppAdapter(Context context, List<AppList> customizedListView) {
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
listStorage = customizedListView;
this.context = context;
}
#Override
public int getCount() {
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
pos = sharedPreferences.getInt("pos", 0);
Log.e("POS",pos+"At Get cpiunt");
return listStorage.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
ViewHolder listViewHolder;
if (convertView == null) {
listViewHolder = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.installed_app_list, parent, false);
listViewHolder.textInListView = (TextView) convertView.findViewById(R.id.list_app_name);
listViewHolder.imageInListView = (ImageView) convertView.findViewById(R.id.app_icon);
convertView.setTag(listViewHolder);
} else {
listViewHolder = (ViewHolder) convertView.getTag();
}
listViewHolder.textInListView.setText(listStorage.get(position).getName());
listViewHolder.imageInListView.setImageDrawable(listStorage.get(position).getIcon());
listViewHolder.textInListView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
editor.putInt("pos", position).apply();
Log.e("Pressed", position + "");
MainActivity.installedAppAdapter.notifyDataSetChanged();
Log.e("Saved", sharedPreferences.getInt("pos", 0) + "value");
}
});
if (pos != 0) {
MainActivity.userInstalledApps.setSelection(pos);
editor.putInt("pos",0).apply();
}
return convertView;
}
static class ViewHolder {
TextView textInListView;
ImageView imageInListView;
}
}
I read many questions but did not get clear picture about how to use SmoothScrolltopostion. Though I as per info got, I captured click position and retrieved during list load to set saved position of list to user.
If I use smoothscrolltoposition, there is no action, but if I use setselection as shown in above code, I could able to see the clicked item in top of view after reloading.
Why smoothscroll is not working and m I doing correct coding for required action. pls guide.
I'm making NLevel expandable list using listview. I've added checkbox only last level data in list view. I have stuck in below scenario.
If I check checkbox then when I expand listview means checkbox gets automatically unchecked.I don't want it to be like that. If I checked checkbox it should stay checked until I uncheck manually.
Please anyone help me!! It's been two days I stuck here.
Here goes my code:
MainActivity.java
public class MainActivity extends Activity {
List<NLevelItem> list;
ListView listView;
Context context;
Button checkButton;
ArrayList<String>tempList;
CheckBox selected = null; //Make only one selection at a time
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView1);
list = new ArrayList<NLevelItem>();
context = this;
checkButton = (Button)findViewById(R.id.buttons);
tempList = new ArrayList<String>();
//here we create 5 grandparent (top level) NLevelItems
//then foreach grandparent create a random number of parent (second level) NLevelItems
//then foreach parent create a random number of children (third level) NLevelItems
//we pass in an anonymous instance of NLevelView to the NLevelItem, this NLevelView is
//what supplies the NLevelAdapter with a View for this NLevelItem
Random rng = new Random();
final LayoutInflater inflater = LayoutInflater.from(this);
for (int i = 0; i < 5; i++) {
final NLevelItem grandParent = new NLevelItem(new SomeObject("GrandParent "+i),null, new NLevelView() {
#Override
public View getView(NLevelItem item) {
View view = inflater.inflate(R.layout.list_item, null);
TextView tv = (TextView) view.findViewById(R.id.textView);
//tv.setBackgroundColor(Color.GREEN);
String name = (String) ((SomeObject) item.getWrappedObject()).getName();
tv.setText(name);
return view;
}
});
list.add(grandParent);
int numChildren = rng.nextInt(4) + 1;
for (int j = 0; j < numChildren; j++) {
NLevelItem parent = new NLevelItem(new SomeObject("Parent "+j),grandParent, new NLevelView() {
#Override
public View getView(NLevelItem item) {
View view = inflater.inflate(R.layout.list_item, null);
TextView tv = (TextView) view.findViewById(R.id.textView);
//tv.setBackgroundColor(Color.YELLOW);
String name = (String) ((SomeObject) item.getWrappedObject()).getName();
tv.setText(name);
return view;
}
});
list.add(parent);
int children = rng.nextInt(3)+1;
for(int x=0; x<children;x++){
final NLevelItem childs = new NLevelItem(new SomeObject("Parent1 "+x),parent, new NLevelView() {
#Override
public View getView(NLevelItem item) {
View view = inflater.inflate(R.layout.list_item, null);
TextView tv = (TextView) view.findViewById(R.id.textView);
//tv.setBackgroundColor(Color.BLUE);
String name = (String) ((SomeObject) item.getWrappedObject()).getName();
tv.setText(name);
return view;
}
});
list.add(childs);
int grandChildren = rng.nextInt(5)+1;
for( int k = 0; k < grandChildren; k++) {
NLevelItem child = new NLevelItem(new SomeObject("child "+k),childs, new NLevelView() {
#Override
public View getView(NLevelItem item) {
View view = inflater.inflate(R.layout.check_list, null);
TextView tv = (TextView) view.findViewById(R.id.checktextView);
final String name = (String) ((SomeObject) item.getWrappedObject()).getName();
final CheckBox checkBox = (CheckBox)view.findViewById(R.id.check);
checkBox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(selected != null){ //Edit
selected.setChecked(false);
}
selected = checkBox; //Edit
if(checkBox.isChecked()){
tempList.add((String) ((SomeObject)childs.getWrappedObject()).getName()+"+"+name);
}
else {
tempList.remove((String) ((SomeObject)childs.getWrappedObject()).getName()+"+"+name);
}
}
});
//tv.setBackgroundColor(Color.GRAY);
tv.setText(name);
return view;
}
});
list.add(child);
}
}
}
}
NLevelAdapter adapter = new NLevelAdapter(list);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
((NLevelAdapter)listView.getAdapter()).toggle(arg2);
((NLevelAdapter)listView.getAdapter()).getFilter().filter();
}
});
checkButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
for (int i=0;i<tempList.size();i++){
Toast.makeText(context,tempList.get(i),Toast.LENGTH_LONG).show();
}
}
});
}
class SomeObject {
public String name;
public SomeObject(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
}
NLevelAdapter.java
public class NLevelAdapter extends BaseAdapter {
List<NLevelItem> list;
List<NLevelListItem> filtered;
public void setFiltered(ArrayList<NLevelListItem> filtered) {
this.filtered = filtered;
}
public NLevelAdapter(List<NLevelItem> list) {
this.list = list;
this.filtered = filterItems();
}
#Override
public int getCount() {
return filtered.size();
}
#Override
public NLevelListItem getItem(int arg0) {
return filtered.get(arg0);
}
#Override
public long getItemId(int arg0) {
return 0;
}
#Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
return getItem(arg0).getView();
}
public NLevelFilter getFilter() {
return new NLevelFilter();
}
class NLevelFilter {
public void filter() {
new AsyncFilter().execute();
}
class AsyncFilter extends AsyncTask<Void, Void, ArrayList<NLevelListItem> > {
#Override
protected ArrayList<NLevelListItem> doInBackground(Void...arg0) {
return (ArrayList<NLevelListItem>)filterItems();
}
#Override
protected void onPostExecute(ArrayList<NLevelListItem> result) {
setFiltered(result);
NLevelAdapter.this.notifyDataSetChanged();
}
}
}
public List<NLevelListItem> filterItems() {
List<NLevelListItem> tempfiltered = new ArrayList<NLevelListItem>();
OUTER: for (NLevelListItem item : list) {
//add expanded items and top level items
//if parent is null then its a top level item
if(item.getParent() == null) {
tempfiltered.add(item);
} else {
//go through each ancestor to make sure they are all expanded
NLevelListItem parent = item;
while ((parent = parent.getParent())!= null) {
if (!parent.isExpanded()) {
//one parent was not expanded
//skip the rest and continue the OUTER for loop
continue OUTER;
}
}
tempfiltered.add(item);
}
}
return tempfiltered;
}
public void toggle(int arg2) {
filtered.get(arg2).toggle();
}
}
Thanks in advance!!
i think you need to store the checkbox state in a boolean (is checked), and reflect that on the view, when getView() is called.
1- Add boolean checked to NLevelItem :
private boolean checked = false;
//add setter: setChecked(boolean)
//add getter isChecked()
2- Use that boolean in getView() (last one where checkbox is added)
#Override
public View getView(final NLevelItem item) {
// .......
final CheckBox checkBox = (CheckBox)view.findViewById(R.id.check);
checkBox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//store checkbox state, note that NLevelItem item might need to be defined with 'final'
item.setChecked(checkBox.isChecked());
if(checkBox.isChecked()){
tempList.add((String) ((SomeObject)childs.getWrappedObject()).getName()+"+"+name);
}
else {
tempList.remove((String) ((SomeObject)childs.getWrappedObject()).getName()+"+"+name);
}
}//onClick()
}//setOnClickListener()
//update checkbox state from the corresponding NLevelItem
checkBox.setChecked(item.isChecked());
//.......
}//getView()
-EDIT:
to select 1 item, you need to iterate all items, set checked = false, but 1
i am not sure if you have to do it on:
List<NLevelItem> list;
or
List<NLevelListItem> filtered;
in the adapter class
private void selectOnly(int position){
for(int a=0;a<list.size();a++){
if(a == position){
list.get(a).setChecked(true);
continue;
}
list.get(a).setChecked(false);
}//for loop
notifyDataSetChanged(); // to update views (checkbox state)
}
Usage: selectOnly(15);
Use ViewHolder class to set and get Tag like this:
public class ListAdapter extends BaseAdapter {
private Context con;
private List<String> dataLt;
private static LayoutInflater inflater = null;
public ListAdapter(Context context, List<String> dataList){
con = context;
dataLt = dataList;
inflater = (LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return dataLt.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
if(convertView==null){
/****** Inflate tabitem.xml file for each row ( Defined below ) *******/
vi = inflater.inflate(R.layout.list_item_search, null);
/****** View Holder Object to contain tabitem.xml file elements ******/
holder = new ViewHolder();
holder.textView = (TextView) vi.findViewById(R.id.textView);
/************ Set holder with LayoutInflater ************/
vi.setTag( holder );
}
else
holder=(ViewHolder)vi.getTag();
return vi;
}
public static class ViewHolder{
TextView textView;
}
}
Hope this may help.
I have ListView with check boxes the app delete the checked items ;; and should delet teh items that have the same id with the checked items :
here's my code
private class CAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private ArrayList<Entity> list;
private Context context;
String Status;
CAdapter(Context context,
ArrayList<Entity> getC) {
this.context = context;
this.list = getC;
Status="";
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
class ViewHolder {
TextView Name;
TextView Desc;
Button deleteBtn;
CheckBox CBox;
}
public int getCount() {
return list.size();
}
public Object getItem(int position) {
return list.get(position);
}
public long getItemId(int position) {
return position;
}
#SuppressLint("NewApi")
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
final CEntity CObj = list.get(position);
if (convertView == null) {
convertView = mInflater.inflate(
R.layout.custom_list_view_confirmed, parent,
false);
holder = new ViewHolder();
holder.Name = (TextView) convertView
.findViewById(R.id.Name);
holder.Desc = (TextView) convertView
.findViewById(R.id.activity1);
holder.deleteBtn = (Button) convertView
.findViewById(R.id.deleteBtn);
holder.CBox=(CheckBox) convertView.findViewById(R.id.isCheck);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (CObj.getMystatus().equals(
context.getResources().getString(R.string.course_status_delete))) {
holder.status.setTextColor(Color.RED);
} else if (attemptedCourseObj.getMystatus().equals(
context.getResources().getString(R.string.course_status_pending))) {
holder.status.setTextColor(Color.GREEN);
} else if (attemptedCourseObj.getMystatus().equals(
context.getResources().getString(R.string.course_status_update))) {
holder.status.setTextColor(Color.BLUE);
}
holder.Name.setText(attemptedCourseObj.getCourseName());
holder.CBox.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(holder.CBox.isChecked()){
if(list.contains(getItem(position))){
list.remove(getItem(position));
}
}
}
});
//
return convertView;
}
}
the problem is when delete the checked it dosent delete the item that have the same id .
int pos=Data.CList.size();
SparseBooleanArray checked=CListView.getCheckedItemPositions();
for (int n = pos; n > 0; n--){
if (checked.get(n)){
code=Data.inList.get(n).getCCode();
Data.inList.remove(n);
}else if(CList.get(n).equal(code){
Data.inList.remove(n);
}
try to refresh the list with notifydatasetchanged and be sure that you delete the entire object from the list
You need to inform your adapter with the new modifications by giving the adapter the new dataset after removing the deleted elements from it and notify with the changes. You can do this as the following:
1)Add method into your adapter to set the new data as following:
public void setNewData(ArrayList<Entity> newEntities){
this.list = newEntities;
}
2)From the activity or the fragment call the previous method with the new data and call this line to notify the adapter with the changes
myAdapter.setNewData(myNewEntities);
myAdapter.notifyDataSetChanges();
Read this answer for more info about NotifyDataSetChanges() method