I have a GridView with 81 buttons on it. I want to add clicklistener to this gridview but it is not available. I have added the OnItemClickListener but it is not working and I cannot understand why. There is no error with the code. The only thing not working is the OnItemClickListener.
My gridview children which has a button on it(gridview_members.xml);
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="@+id/city"
android:layout_width="183dp"
android:layout_height="90dp"
android:textSize="19sp"
android:textStyle="bold"
android:text="Code\n\nCity"
android:gravity="center"
android:background="@drawable/city_btn_tablet" />
</RelativeLayout>
My ImageAdapter class;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return 81;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View gridView;
gridView =new View(mContext);
gridView = inflater.inflate(R.layout.gridview_members, null);
Button city = (Button) gridView.findViewById(R.id.city);
return gridView;
}
}
Gridview implementation on activity_main.xml ;
<GridView
android:id="@+id/gridview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:horizontalSpacing="5dp"
android:verticalSpacing="5dp"
android:gravity="center"
android:stretchMode="columnWidth"
android:numColumns="6" >
</GridView>
And finally my MainActivity.java file;
public class MainActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(MainActivity.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
}
To add listener to the grid add the following code: // Implement On Item click listener gridView1. setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { switch (position) { case 0: break; case 1: break; } } });
That id is inside gridview_layout. xml . So you need to create a custom BaseAdapter and set that do be your Adapter for the GridView . Then in your overriden getView method inside this custom BaseAdapter , you will have get the Button like you failed to do.
// Implement On Item click listener gridView1.setOnItemClickListener (new OnItemClickListener () { @Override public void onItemClick (AdapterView<?> parent, View view, int position, long id) { switch (position) { case 0: break; case 1: break; } } }); And so on you can add all numbers in the cases.
setOnItemClickListener() method applies on grid view to detect grid view item clicked or not.
Android GridView shows items in two-dimensional scrolling grid (rows & columns) and the grid items are not necessarily predetermined but they automatically inserted to the layout using a ListAdapter. An adapter actually bridges between UI components and the data source that fill data into UI Component.
Android GridView shows items in two-dimensional scrolling grid (rows & columns) and the grid items are not necessarily predetermined but they automatically inserted to the layout using a ListAdapter
GridView is clickable no need to put button inside GridView.
To add listener to the grid add the following code:
// Implement On Item click listener
gridView1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0:
break;
case 1:
break;
}
}
});
And so on you can add all numbers in the cases.
You are requesting click on the item(not on the button inside the item) so need to change your child XML layout
from
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="@+id/city"
android:layout_width="183dp"
android:layout_height="90dp"
android:textSize="19sp"
android:textStyle="bold"
android:text="Code\n\nCity"
android:gravity="center"
android:background="@drawable/city_btn_tablet" />
</RelativeLayout>
to
<?xml version="1.0" encoding="utf-8"?>
<Button
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/city"
android:layout_width="183dp"
android:layout_height="90dp"
android:textSize="19sp"
android:clickable="true"
android:textStyle="bold"
android:text="Code\n\nCity"
android:gravity="center"
android:background="@drawable/city_btn_tablet" />
or you can add ClickListener inside adapter
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View gridView;
gridView =new View(mContext);
gridView = inflater.inflate(R.layout.gridview_members, null);
Button city = (Button) gridView.findViewById(R.id.city);
city.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Toast here
}});
return gridView;
}
If you want to get text that clicked item you can use this
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String item = ((TextView)view.findViewById(R.id.ID_OF_TEXTVIEW)).getText().toString();
Toast.makeText(showMissions.this, "" + item, Toast.LENGTH_SHORT).show();
}
});
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