A solution to scrolling-problem when the ScrollView mix with ScrollView or RecycleView or ListView etc.

mixscroll.java

	//Also been posted http://stackoverflow.com/a/28944297/1835650
	//R.id.parent_view: The parent ScrollView.
	//R.id.child_view: A scrollable object like RecycleView, ScrollView or ListView.
findViewById(R.id.parent_view).setOnTouchListener(new View.OnTouchListener() {
			public boolean onTouch(View v, MotionEvent event) {
				View childV = findViewById(R.id.child_view);
				if (childV != null) {
					int[] l = new int[2];
					childV.getLocationOnScreen(l);
					RectF rect = new RectF(l[0], l[1], l[0] + childV.getWidth(), l[1] + childV.getHeight());
				 	if(rect.contains(  event.getX(), event.getY())) {
						childV.getParent()
								.requestDisallowInterceptTouchEvent(false);
						childV.onTouchEvent(event);
						return true;
					}
				}
				childV.getParent()
						.requestDisallowInterceptTouchEvent(true);
				return false;
			}
		});