Question

I added a touch event to a linear layout to respond to swipe gestures, and it works well. However, when i add buttons to the layout, the parent liner layout is ignored. How should I prevent this from happening?

LinearLayout ln2 = (LinearLayout) findViewById(R.id.fr2);
ln2.setOnTouchListener(swipe);

How to i use onInterceptTouch?

Answer 1

You should create your own layout and override onInterceptTouchEvent(MotionEvent ev) method of your layout.

For Example I created my own layout which extends RelativeLayout

       @Override
       public boolean onInterceptTouchEvent(MotionEvent ev) {
         return true; // With this i tell my layout to consume all the touch events from its childs
      }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
        // Log.d(TAG, String.format("ACTION_DOWN | x:%s y:%s", 
            break;
        case MotionEvent.ACTION_MOVE:
        //Log.d(TAG, String.format("ACTION_MOVE | x:%s y:%s", 
            break;
        case MotionEvent.ACTION_UP:
            break;
        }
        return true;
    }

And when i put a button to my layout, even i clicked that button, My Layout consumes all the touchEvent because of the onInterceptTouchEvent always returns true.

Hope this should help you