You need to enable long click by code:
imageView.setLongClickable(true);
imageView.setClickable(true);
The last line is probably not necessary but it also makes no trouble.
Frage
I have an ImageView
. I need to use onLongClickListener
for ImageView. When I use this code nothing happen.
Code:
gallery=(Gallery)findViewById(R.id.gall1);
gallery.setAdapter(new ImageAdapter(MainActivity.this));
gallery.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(
AdapterView<?> parent, View v,
int position, long id) {
// TODO Auto-generated method stub
final ImageView imageView = (ImageView) findViewById(R.id.image1);
imageView.setImageResource(imageIDs[position]);
imageView.setLongClickable(true);
imageView.setOnLongClickListener(new View.OnLongClickListener(){
@Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Long Press work", Toast.LENGTH_SHORT).show();
return true;
}
});
imageView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v,MotionEvent event) {
// TODO Auto-generated method stub
layoutParams = (RelativeLayout.LayoutParams) imageView.getLayoutParams();
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN :
{
parms = (RelativeLayout.LayoutParams) imageView.getLayoutParams();
dx = event.getRawX() - parms.leftMargin;
dy = event.getRawY() - parms.topMargin;
}
break;
case MotionEvent.ACTION_MOVE :
{
x = event.getRawX();
y = event.getRawY();
parms.leftMargin = (int) (x-dx);
parms.topMargin = (int) (y - dy);
imageView.setLayoutParams(parms);
}
break;
case MotionEvent.ACTION_UP :
{
}
break;
}
return true;
}
});
}
});
Lösung
You need to enable long click by code:
imageView.setLongClickable(true);
imageView.setClickable(true);
The last line is probably not necessary but it also makes no trouble.
Andere Tipps
Its not necessary to do setLongClickable in the code, its better when you define it in the XML
android:longClickable="true"