I have a problem with a simple ListView on a Samsung phone.
I create a new ListView programmatically. The items are simple TextView. I put a listener on my list view:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
view.setSelected(true);
}
});
The TextView (i.e. items of listView) use a ColorStateList as textColor (pressed-->Green ; selected-->Blue ; default-->Red).
On the emulator, everything is fine : items are red by default , when I press one it become green, and when I release it become blue. If I select another item : the previously selected go back to red and the newly selected became blue.
On my Samsung device : items are red by default , when I press one it become green, and when I release it become red again (i.e. not selected).
It seems to be a bug in the Samsung ListView implementation (it's a custom implementation and so difficult to trace without source code).
EDIT: not a bug but a slightly different behavior because of touch mode (see link in accepted answer)
Do you have any ideas on how to workaround this bug/behavior?
Additional constraint: I can't use an xml selector because I receive the color to use only at runtime.
My device is a Samsung GT-B5330 , API 15. (but I expect it occurs on most Samsung devices)
Here is the complete (compilable) code
import android.R;
import android.app.Activity;
import android.content.res.ColorStateList;
import android.database.DataSetObserver;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class TestActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
RelativeLayout rootLayout = new RelativeLayout(this);
setContentView(rootLayout);
//create listView
ListView listView = new ListView(this);
listView.setAdapter(new MyListAdapter());
listView.setDivider(null);
listView.setDividerHeight(0);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setItemsCanFocus(false);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
view.setSelected(true);
}
});
listView.setBackgroundColor(Color.WHITE);
//positionning listView
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(100,200);
lp.setMargins(50,50,10,10);
rootLayout.addView(listView, lp);
}
private class MyListAdapter implements ListAdapter{
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ColorStateList colorStateList = new ColorStateList(
new int[][]{
new int[]{R.attr.state_pressed},
new int[]{R.attr.state_selected},
new int[]{-R.attr.state_selected},
},
new int[]{
Color.GREEN,
Color.BLUE,
Color.RED});
TextView textView = new TextView(parent.getContext());
textView.setText("Item " + position);
textView.setTextColor(colorStateList);
return textView;
}
@Override
public boolean areAllItemsEnabled() {
return true;
}
@Override
public boolean isEnabled(int position) {
return true;
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
}
@Override
public int getCount() {
return 10;
}
@Override
public Object getItem(int position) {
return "data "+position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public boolean isEmpty() {
return getCount()>0;
}
}
}
