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Show a string in multiple TextViews in adapter

My App currently displays 4 options (which I want to make clickable) in a single TextView. At the moment, it looks like this (i.e. last message bubble): app picture
Instead of the above, I want to have those options as 4 separate TextViews, like in this example. I researched multiple solutions, but none of them worked for me, because I am using RecyclerView.Adapter. Here is the relevant part:
case OPTION:
String option = "";
option = message.getMessage();
for ( DialogNodeOutputOptionsElement r : message.getOptions() ){
option += r.getLabel()+"<br/>";
((ViewHolder) holder).message.setText(Html.fromHtml(option));
// new TextView for next Option
The whole ChatAdapter looks like this:
public class ChatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
protected Activity activity;
private int SELF = 100;
private ArrayList<Message> messageArrayList;
public ChatAdapter(ArrayList<Message> messageArrayList) {
this.messageArrayList = messageArrayList;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
// view type is to identify where to render the chat message
// left or right
if (viewType == SELF) {
// self message
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.chat_item_self, parent, false);
} else {
// WatBot message
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.chat_item_watson, parent, false);
}
return new ViewHolder(itemView);
}
#Override
public int getItemViewType(int position) {
Message message = messageArrayList.get(position);
if (message.getId() != null && message.getId().equals("1")) {
return SELF;
}
return position;
}
#Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
Message message = messageArrayList.get(position);
switch (message.type) {
case TEXT:
((ViewHolder) holder).message.setText(Html.fromHtml(message.getMessage()+"<br/>"));
break;
case IMAGE:
((ViewHolder) holder).message.setVisibility(View.GONE);
ImageView iv = ((ViewHolder) holder).image;
Glide
.with(iv.getContext())
.load(message.getUrl())
.into(iv);
break;
case OPTION:
String option = "";
option = message.getMessage();
for ( DialogNodeOutputOptionsElement r : message.getOptions() ){
option += r.getLabel()+"<br/>";
((ViewHolder) holder).message.setText(Html.fromHtml(option));
// new TextView for next Option
}
break;
case PAUSE:break;
}
}
#Override
public int getItemCount() {
return messageArrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView message;
ImageView image;
public ViewHolder(View view) {
super(view);
message = (TextView) itemView.findViewById(R.id.message);
image = (ImageView) itemView.findViewById(R.id.image);
//TODO: Uncomment this if you want to use a custom Font
}
}
}
and the XML looks like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linear"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<android.support.v7.widget.AppCompatImageView
android:layout_width="54dp"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:src="#mipmap/new_face" />
<TextView
android:id="#+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="5dp"
android:layout_marginTop="5dp"
android:layout_marginRight="5dp"
android:layout_marginBottom="10dp"
android:autoLink="web"
android:background="#drawable/bg_bubble_watbot"
android:fontFamily="sans-serif"
android:textColor="#android:color/black"
android:textIsSelectable="true"
android:textSize="14sp" />
<ImageView
android:id="#+id/image"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
Contex Error
App picture after working code

Try following:
Inside your layout, add a container for your to-be-added TextViews:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linear"... >
<android.support.v7.widget.AppCompatImageView ... />
<TextView ... />
<LinearLayout android:id="#+id/optionsContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/bg_bubble_watbot"
android:orientation="vertical" />
<ImageView .../>
</LinearLayout>
Then, update your ViewHolder to reference the container:
public class ViewHolder extends RecyclerView.ViewHolder {
...
LinearLayout optionsContainer;
public ViewHolder(View view) {
super(view);
...
optionsContainer = (LinearLayout) itemView.findViewById(R.id.optionsContainer);
}
}
Then, in your OPTION case:
TextView tv = ((ViewHolder) holder).message;
tv.setVisibility(View.GONE));
LinearLayout optionsContainer = ((ViewHolder) holder).optionsContainer;
TextView messageTextView = createTextView(message.getMessage(), optionsContainer.getContext());
for ( DialogNodeOutputOptionsElement r : message.getOptions() ) {
// you should check if r.getLabel() really returns a HTML string
// if not, you will have to enclose it with html tags to make it clickable later
String option = r.getLabel();
TextView optionTextView = createTextView(option, optionsContainer.getContext());
// add the created textView to our container
optionsContainer.addView(optionTextView);
}
Implement the createTextView() function inside your adapter:
private TextView createTextView(String text, Context context) {
TextView tv = new TextView(context);
LinearLayout.LayoutParams params=new LinearLayout.LayoutParams
((int) LinearLayout.LayoutParams.WRAP_CONTENT,(int) LinearLayout.LayoutParams.WRAP_CONTENT);
tv.setLayoutParams(params);
tv.setTextSize((float) 15);
tv.setText(text);
int blueColor = Color.parseColor("#0000ff");
// make text blue
tv.setTextColor(blueColor);
// make text underline
tv.setPaintFlags(tv.getPaintFlags()| Paint.UNDERLINE_TEXT_FLAG);
tv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(context, "Link clicked", Toast.LENGTH_SHORT).show();
// add here what the click should do
}
});
return tv;
}

How to add a spinner to each item inside a recyclerview?

I am trying to add a spinner object inside each item of a recyclerview.
I think the problem is that in OnCreate the setContentView(R.layout.activity_modify_list2) is referring to the xml file that contains the recyclerview:
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_modify_list2);
initView();
}
Because of this, the createSpinner() method is looking for the spinner in that file rather than the xml file for the individual recyclerview item, giving a null object reference error:
private Spinner CreateSpinner() {
Spinner staticSpinner = findViewById(R.id.spinner);
... }
Full java file for the page:
public class ModifyListActivity extends Activity {
private RecyclerView recyclerView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_modify_list2);
initView();
}
private void initView() {
recyclerView = (RecyclerView) findViewById(R.id.recyclerViewModifyList);
createList();
}
private void createList() {
ArrayList<ModifyListPageItem> items = new ArrayList<>();
ModifyListPageItem item;
item = new ModifyListPageItem();
item.setTitle("Resident Evil Games");
item.setDescription("Ranking all Resident Evil games");
items.add(item);
item = new ModifyListPageItem();
item.setRank("1.");
item.setSpinner(CreateSpinner());
items.add(item);
item = new ModifyListPageItem();
item.setRank("2.");
item.setSpinner(CreateSpinner());
items.add(item);
item = new ModifyListPageItem();
item.setRank("3.");
item.setSpinner(CreateSpinner());
items.add(item);
// set adapter
ModifyListPageAdapter adapter = new ModifyListPageAdapter(this, items);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
}
private Spinner CreateSpinner() {
Spinner staticSpinner = findViewById(R.id.spinner);
// Create an ArrayAdapter using the string array and a default spinner
ArrayAdapter<CharSequence> staticAdapter = ArrayAdapter
.createFromResource(this, R.array.resident_evil_games,
android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
staticAdapter
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
staticSpinner.setAdapter(staticAdapter);
return staticSpinner;
}
}
Full Java file for adapter
public class ModifyListPageAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static int TYPE_HEADER = 1;
private static int TYPE_ITEM = 2;
private Context context;
private ArrayList<ModifyListPageItem> items;
public ModifyListPageAdapter(Context context, ArrayList<ModifyListPageItem> items) {
this.context = context;
this.items = items;
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view;
if (viewType == TYPE_HEADER) {
view = LayoutInflater.from(context).inflate(R.layout.item_modlist_header, parent, false);
return new HeaderViewHolder(view);
}
else {
view = LayoutInflater.from(context).inflate(R.layout.item_modlist_object, parent, false);
return new ItemViewHolder(view);
}
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
if (getItemViewType(position) == TYPE_HEADER)
((HeaderViewHolder)holder).SetHeaderDetails(items.get(position));
else
((ItemViewHolder)holder).SetItemDetails(items.get(position));
}
#Override
public int getItemCount() {
return items.size();
}
#Override
public int getItemViewType(int position) {
if (TextUtils.isEmpty(items.get(position).getRank())) {
return TYPE_HEADER;
}
else
return TYPE_ITEM;
}
class HeaderViewHolder extends RecyclerView.ViewHolder {
private TextView txtTitle;
private TextView txtDescription;
public HeaderViewHolder(#NonNull View itemView) {
super(itemView);
txtTitle = itemView.findViewById(R.id.txtModListTitle);
txtDescription = itemView.findViewById(R.id.txtModListDescription);
}
private void SetHeaderDetails(ModifyListPageItem item) {
txtTitle.setText(item.getTitle());
txtDescription.setText(item.getDescription());
}
}
class ItemViewHolder extends RecyclerView.ViewHolder {
private TextView txtRank;
private Spinner spinner;
public ItemViewHolder(#NonNull View itemView) {
super(itemView);
txtRank = itemView.findViewById(R.id.modlist_rank);
spinner = itemView.findViewById(R.id.spinner);
}
private void SetItemDetails(ModifyListPageItem item) {
txtRank.setText(item.getRank());
spinner.setOnItemClickListener(spinner.getOnItemClickListener());
}
}
}
XML file for the page layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ModifyListActivity">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/bottom_navigation"
app:itemBackground="#color/colorPrimary"
app:itemTextColor="#drawable/selector"
app:itemIconTint="#drawable/selector"
app:menu="#menu/menu_navigation"
android:layout_alignParentBottom="true"
android:background="#color/colorPrimary"/>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerViewModifyList"/>
</RelativeLayout>
XML File for the recyclerview item layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="1dp"
android:padding="8dp"
tools:context=".MainActivity">
<TextView
android:id="#+id/modlist_rank"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="1."
android:textColor="#000000"
android:textSize="38dp" />
<Spinner
android:id="#+id/spinner"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp" />
</LinearLayout>

Remove item from gridview

I'm removing images from a gridview when a button is pressed.
The images does remove fine and the gridview also updates with the call "adapter.notifyDataSetChanged();".
When an imageview is removed another image next to this position should take its position. This happens, but the image here won't reload so there's just a blank space? How can I get this imageview to reload its image?
The problem:
Here is my gridadapter:
public class FavoriteMovieGridAdapter extends BaseAdapter {
Context context;
ArrayList<DataFavorites> List;
FavoritesMovie fragment;
private static LayoutInflater inflater = null;
FavoriteMovieGridAdapter adapter = this;
public FavoriteMovieGridAdapter(Context context, ArrayList<DataFavorites> List, FavoritesMovie fragment) {
this.context = context;
this.List = List;
this.fragment = fragment;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return List.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// Avoid unneccessary calls to findViewById() on each row
final ViewHolder holder;
/*
* If convertView is not null, reuse it directly, no inflation
* Only inflate a new View when the convertView is null.
*/
if (convertView == null) {
convertView = inflater.inflate(R.layout.favorite_grid_item, null);
holder = new ViewHolder();
holder.poster = (ImageView) convertView.findViewById(R.id.upcoming_image);
holder.editbutton = (ImageView) convertView.findViewById(R.id.delete_item);
// The tag can be any Object, this just happens to be the ViewHolder
convertView.setTag(holder);
}
else{
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
final View finalConvertView = convertView;
final DataFavorites e;
new DataFavorites();
e = List.get(position);
String url = String.valueOf(e.getUrl());
// load image url into poster
// Seems as if this doesn't run for the imageview next to this when this view is removed?
Picasso.with(context).load(url).fit().placeholder(R.drawable.movie_back).into(holder.poster);
// Create onclick and show edit button
convertView.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
// show edit button
holder.editbutton.setVisibility(View.VISIBLE);
YoYo.with(Techniques.FadeIn).duration(700).playOn(finalConvertView.findViewById(R.id.delete_item));
// onclick edit button remove item and update gridview
holder.editbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
YoYo.with(Techniques.ZoomOut).duration(700).playOn(finalConvertView.findViewById(R.id.favorite_relative));
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
adapter.List.remove(e);
adapter.notifyDataSetChanged();
// Delete specific movie from data base
DatabaseHandlerMovie db = new DatabaseHandlerMovie(context);
// Reading all movies
db.deleteMovie(e);
}
}, 1000);
}
});
return false;
}
});
return convertView;
}
static class ViewHolder {
ImageView poster;
ImageView editbutton;
}
}
My grid item layout:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/favorite_relative"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal">
<ImageView android:layout_width="123.3dp"
android:layout_height="185.3dp"
android:id="#+id/upcoming_image"
android:scaleType="fitXY" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/delete_item"
android:src="#drawable/ic_remove_circle_outline_white_24dp"
android:tint="#color/colorPrimaryDark"
android:clickable="true"
android:visibility="gone"
android:layout_alignRight="#+id/upcoming_image"
android:layout_alignEnd="#+id/upcoming_image"/>
</RelativeLayout>
My grid layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".Favorites"
android:background="#FFFFFF"
android:focusableInTouchMode="true">
<GridView
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:id="#+id/movies_gridlayout"
android:paddingRight="-1dp"
android:paddingEnd="-1dp"
android:numColumns="3"
android:background="#ffffff"
android:visibility="invisible"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/favorite_none"
android:text="No favorite movies found"
android:textSize="15sp"
android:visibility="gone"
android:textColor="#color/SecondaryText"
/>
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone"
>
</ProgressBar>
</FrameLayout>

Turns out a 3rd-party lib was causing this:
YoYo.with(Techniques.ZoomOut).duration(700).playOn(finalConvertView.findViewById(R.id.favorite_relative));

you will have adapter and mainactivity for gridview
So u will have to implement public interface in both of them to communicate
following code may help you :)
In Adapter class add following code
private OnItemClickListner onItemClickListner;
public MyAdapter(Context c, List<PDFDoc> pdfDocs,OnItemClickListner onItemClickListner) {
this.context = c;
this.pdfDocs = pdfDocs;
this.onItemClickListner=onItemClickListner;
}
public interface OnItemClickListner {
void removefromadapter(int position);
}
ImageButton imageButton = view.findViewById(R.id.cancelid);
imageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// write your stuff here
onItemClickListner.removefromadapter(position);
}
});
In MainActivity of gridview add following code
implements OnItemClickListner required**
public class addclient_fragment extends Fragment implements MyAdapter.OnItemClickListner {
you will required to add this method in mainactivity
#Override
public void removefromadapter(int position) {
// write your stuff here
}

Gridview adapter images with title name for images group

I have a gridView witch contains a group of images with two columns, what I want to do is to put a title for a group of images.
Now I can do that but the problem that title is that the title is only in one column and the second column is always empty, how can I put the title in the two columns?
Here is my adapter:
public class MultimediaPhotosAdapter extends BaseAdapter {
private Context mContext;
private List<ImagesDto> imagesDto = new ArrayList<ImagesDto>();
ImagesFlickrDto imagesFlickrDto;
final String formatImage = ImagesNameFormat.FORMAT_IMAGE_DEFAULT.getImagesNameFormat();
ImagesFormatsDto currentImageFormatToDisplay;
GridView gridViewImages;
public MultimediaPhotosAdapter(Context context, GridView gridViewImages) {
this.gridViewImages = gridViewImages;
this.mContext = context;
}
#Override
public int getCount() {
return imagesDto.size();
}
#Override
public Object getItem(int position) {
return imagesDto.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View itemView = null;
HolderElementGridView holderElementGridView;
ImagesDto currentImage = imagesDto.get(position);
if(convertView == null) {
holderElementGridView = new HolderElementGridView();
itemView = View.inflate(mContext,R.layout.item_multimedia_photo,null);
holderElementGridView.image = (NetworkImageView) itemView.findViewById(R.id.imageView);
holderElementGridView.title = (TextView) itemView.findViewById(R.id.title);
itemView.setTag(holderElementGridView);
}
else {
itemView = convertView;
holderElementGridView = (HolderElementGridView)itemView.getTag();
}
if(imagesDto.get(position).isFirstElementOfCategorie()){
holderElementGridView.image.setVisibility(View.GONE);
holderElementGridView.title.setVisibility(View.VISIBLE);
holderElementGridView.title.setText(currentImage.getTitle());
}
else if(imagesDto.get(position).getUrl()!=null){
holderElementGridView.image.setVisibility(View.VISIBLE);
holderElementGridView.title.setVisibility(View.GONE);
holderElementGridView.image.setImageUrl(StringFormat.getUrlImage(mContext, currentImage.getUrl(), currentImageFormatToDisplay.getSuffix(), currentImageFormatToDisplay.getExtension()),VolleySingleton.getInstance(mContext).getImageLoader());
holderElementGridView.image.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
DrawerLayoutInterface screenInterface=(DrawerLayoutInterface)mContext;
if(screenInterface!=null)
screenInterface.showDiaporama(imagesFlickrDto,position);
}
});
}
// column near title is empty
else{
holderElementGridView.image.setVisibility(View.VISIBLE);
holderElementGridView.title.setVisibility(View.GONE);
}
return itemView;
}
public void update(ImagesFlickrDto imagesFlickrDto){
this.imagesFlickrDto = imagesFlickrDto;
this.imagesDto = imagesFlickrDto.getListImages();
AdministrerImagesSA administrerImages = new AdministrerImagesSAImpl();
currentImageFormatToDisplay = administrerImages.getFormatByProriete(imagesFlickrDto.getImagesFormatsDto(), formatImage);
}
class HolderElementGridView{
NetworkImageView image;
TextView title;
}
}
item_multimedia_photo.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:geekui="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<com.netcosports.anderlecht.activity.utils.TypefaceTextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="#dimen/text_size_item_menu"
android:visibility="gone"
android:layout_marginLeft="5dp"
geekui:customTypeface="fonts/DIN-Regular.otf" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:src="#drawable/ic_launcher" >
</com.android.volley.toolbox.NetworkImageView>
</LinearLayout>
</LinearLayout>

ListView / ListAdapter with 2 strings in Android project

I am working on Android project. I follow tutorial from http://www.vogella.com/articles/AndroidSQLite/article.html but I stuck on something. Tutorial shows how to use Class with 1 String object. I am working with 2 String objects. So I changed few things (add new String to my class, change layout.simple_list_item_1 to android.R.layout.simple_list_item_2 etc.) And now the question is - how to make something to get Stoliki class objects (override toString() gives me only 1 item, so It's useless).
Class Stoliki
public class Stoliki {
private long id;
private String numer;
private String opis;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getNumer() {
return numer;
}
public void setNumer(String numer) {
this.numer = numer;
}
public String getOpis() {
return opis;
}
public void setOpis(String opis) {
this.opis = opis;
}
}
Activity
import android.app.ListActivity;
import android.os.Bundle;
import java.util.List;
import java.util.Random;
import android.view.View;
import android.widget.ArrayAdapter;
public class FirstGridPage extends ListActivity {
private StolikiDataSource datasource;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_list_stoliki);
datasource = new StolikiDataSource(this);
datasource.open();
List<Stoliki> values = datasource.getAllStoliki();
// Use the SimpleCursorAdapter to show the
// elements in a ListView
ArrayAdapter<Stoliki> adapter = new ArrayAdapter<Stoliki>(this,
android.R.layout.simple_list_item_1, values);
setListAdapter(adapter);
}
// Will be called via the onClick attribute
// of the buttons in main.xml
public void onClick(View view) {
#SuppressWarnings("unchecked")
ArrayAdapter<Stoliki> adapter = (ArrayAdapter<Stoliki>) getListAdapter();
Stoliki stolik = null;
switch (view.getId()) {
case R.id.add:
String[] stoliki_numer = new String[] { "1", "2", "3" };
String[] stoliki_opis = new String[] { "Czerwony", "Niebieski", "Zielony" };
int nextInt = new Random().nextInt(3);
// Save the new comment to the database
stolik = datasource.createStolik(stoliki_numer[nextInt], stoliki_opis[nextInt]);
adapter.add(stolik);
break;
case R.id.delete:
if (getListAdapter().getCount() > 0) {
stolik = (Stoliki) getListAdapter().getItem(0);
datasource.deleteStolik(stolik);
adapter.remove(stolik);
}
break;
}
adapter.notifyDataSetChanged();
}
#Override
protected void onResume() {
datasource.open();
super.onResume();
}
#Override
protected void onPause() {
datasource.close();
super.onPause();
}
}

http://www.youtube.com/watch?v=wDBM6wVEO70. Listview talk by Romain guy( android developer at google).
Main.xml
<ListView android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:focusableInTouchMode="false"
android:listSelector="#android:color/transparent"
android:layout_weight="2"
android:headerDividersEnabled="false"
android:footerDividersEnabled="false"
android:dividerHeight="8dp"
android:divider="#000000"
android:cacheColorHint="#000000"
android:drawSelectorOnTop="false">
</ListView>
</LinearLayout>
Customw row. row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:background="#ffffff"
>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:background="#drawable/itembkg"
/>
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="TextView" />
</LinearLayout>
public class CustomListView extends Activity {
/** Called when the activity is first created. */
ListView lv1;
Customlistadapter cus;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Button b= (Button) findViewById(R.id.remove);
lv1 = (ListView) findViewById(R.id.list);
cus= new Customlistadapter(this);
lv1.setAdapter(cus);
}
}
Custom list adapter. Inflate custom layout for each row.
public class Customlistadapter extends ArrayAdapter {
private LayoutInflater mInflater;
Context c;
public Customlistadapter(CustomListView customListView) {
super(customListView, 0);
// TODO Auto-generated constructor stub
this.mInflater = LayoutInflater.from(customListView);
c=customListView;
}
public int getCount() {
return 20; // number of listview rows.
}
public Object getItem(int arg0) {
return arg0;
}
public long getItemId(int arg0) {
return arg0;
}
public View getView(final int arg0, View arg1, ViewGroup arg2) {
final ViewHolder vh;
vh= new ViewHolder();
if(arg1==null )
{
arg1=mInflater.inflate(R.layout.row, arg2,false);
vh.tv1= (TextView)arg1.findViewById(R.id.textView1);
vh.tv2= (TextView)arg1.findViewById(R.id.textView2);
}
else
{
arg1.setTag(vh);
}
vh.tv1.setText("hello");
vh.tv2.setText("hello");
return arg1;
}
static class ViewHolder //use a viewholder for smooth scrolling and performance.
{
TextView tv1,tv2;
}
}
Edit:
Your activity will have a listview. This is set in oncreate setContentView(R.layout.activity_main);. The main layout will have a listview. You set the adapter of listview as listview.setAdapter(youradapter);
Then listview will have custom layout ie row.xml inflated for each row item. You custom adapter for listview is where the row.xml is inflated. You defined your class CustomAdapter which extends ArrayAdapter. You override a set of methods.
getCount() --- size of listview.
getItem(int position) -- returns the position
getView(int position, View convertView, ViewGroup parent)
// position is the position in the listview.
//convertview - view that is tobe inflated
// you will return the view that is infated.
You will have to use a viewholder for smooth scrolling and performance. Imagine 1000 rows is lstview with images it may cause memory exceptions. One way to get rid of this is to recycle views. The visible views(rows) are not recycled. The video in the link at the top has a detail explanation on the topic
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#0095FF">
<ListView android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:focusableInTouchMode="false"
android:listSelector="#android:color/transparent"
android:layout_weight="2"
android:headerDividersEnabled="false"
android:footerDividersEnabled="false"
android:dividerHeight="8dp"
android:divider="#000000"
android:cacheColorHint="#000000"
android:drawSelectorOnTop="false">
</ListView>
</LinearLayout>
row.xml (layout inflated for each listview row)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Header" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="80dp"
android:layout_gravity="center"
android:text="TextView" />
</LinearLayout>
MainActivity
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView ll = (ListView) findViewById(R.id.list);
CustomAdapter cus = new CustomAdapter();
ll.setAdapter(cus);
}
class CustomAdapter extends BaseAdapter
{
LayoutInflater mInflater;
public CustomAdapter()
{
mInflater = (LayoutInflater) MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return 30;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
final ViewHolder vh;
vh= new ViewHolder();
if(convertView==null )
{
convertView=mInflater.inflate(R.layout.row, parent,false);
vh.tv2= (TextView)convertView.findViewById(R.id.textView2);
vh.tv1= (TextView)convertView.findViewById(R.id.textView2);
}
else
{
convertView.setTag(vh);
}
vh.tv1.setText("my text");
vh.tv2.setText("Postion = "+position);
return convertView;
}
class ViewHolder
{
TextView tv1,tv2;
}
}
}