android: ViewPager and HorizontalScrollVIew

Question

I have a `HorizontalScrollView` inside my `ViewPager`. I set `requestDisallowInterceptTouchEvent(true);` for the `HorizontalScrollView` but the `ViewPager` is still sometimes intercepting touch events. Is there another command I can use to prevent a View's parent and ancestors from intercepting touch events? note: the `HorizontalScrollView` only occupies half the screen.

Accepted Answer

I had the same problem. My solution was:

- Make a subclass of `ViewPager` and add a property called `childId`.

- Create a setter for the `childId` property and set the id of the `HorizontalScrollView`.

- Override `onInterceptTouchEvent()` in the subclass of `ViewPager` and if the `childId` property is more than 0 get that child and if the event is in `HorizontalScrollView` area return false.

Code

```
public class CustomViewPager extends ViewPager {

private int childId;

public CustomViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

@Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        if (childId > 0) {
            View scroll = findViewById(childId);
            if (scroll != null) {
                Rect rect = new Rect();
                scroll.getHitRect(rect);
                if (rect.contains((int) event.getX(), (int) event.getY())) {
                    return false;
                }
            }
        }
        return super.onInterceptTouchEvent(event);
    }

public void setChildId(int id) {
        this.childId = id;
    }
}
```

In `onCreate()` method

```
viewPager.setChildId(R.id.horizontalScrollViewId);
adapter = new ViewPagerAdapter(this);
viewPager.setAdapter(adapter);
```

Hope this help

android: ViewPager and HorizontalScrollVIew

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