Android - ListView inside Gallery makes the scrolling not Smooth

Question

I implemented a gallery, and inside it I have many listviews from left to right. For some reason Gallery works great with all views but not with listview. With listview, whe

Answer 1

I had have the same problem. And the solution is less than simple.

1. • Set the listview to be not focusable in touch mode.

   listView.setFocusableInTouchMode(false);

   • If you need focus, call it from onItemSelected listener.

2. Use OnInterceptTouchEvent to get Touch Events from your child. And make some modification in onScroll and onTouchEvent of your Gallery

   OnItemSelectedListener mOnItemSelected = new OnItemSelectedListener()
   {   
       @Override
       public void onItemSelected(AdapterView parent, View view,
               int position, long id)
       {
         view.requestFocusFromTouch();
       }
       @Override
       public void onNothingSelected(AdapterView parent)
       {               
       }
   };
   
   @Override
   public boolean onInterceptTouchEvent(MotionEvent ev) {
       onTouchEvent(ev);
       return scrollingHorizontally;
   }
   
   @Override
   public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
       if(Math.abs(distanceX)>Math.abs(distanceY) || scrollingHorizontally == true){
           scrollingHorizontally = true;
           super.onScroll(e1, e2, distanceX, distanceY);
       }
       return scrollingHorizontally;
   }
   
   @Override
   public boolean onTouchEvent(MotionEvent event) {
       switch(event.getAction()) {
       case MotionEvent.ACTION_UP:
       case MotionEvent.ACTION_CANCEL:
           scrollingHorizontally = false;
           break;
       default:
               break;
       }
       super.onTouchEvent(event);
       return scrollingHorizontally;
   }