ScrollView inside Gallery, both scrolling independently

Question

I have a Gallery with an adapter which supplies it ScrollViews as its child views. I need to make sure that the touch events are handled correctly and as expected:

Answer 1

I have tried solution provided by Warlax. It moved me forward but unfortunately it breaks normal gallery behavior in some rare cases. (For example it doesn't stop on touch while scrolling) So I did more research and came up with the following solution.

public class TouchInterceptingGallery extends Gallery {

    public TouchInterceptingGallery(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

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

    public TouchInterceptingGallery(Context context) {
        super(context);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        this.onTouchEvent(ev);
        return false;
    }

}

Answer 2

OK, after some major fiddling and logcat hacking, here's the solution:

public class SwipeInterceptingGallery extends Gallery {

    private float mInitialX;
    private float mInitialY;
    private boolean mNeedToRebase;
    private boolean mIgnore;

    public SwipeInterceptingGallery(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

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

    public SwipeInterceptingGallery(Context context) {
        super(context);
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
            float distanceY) {
        if (mNeedToRebase) {
            mNeedToRebase = false;
            distanceX = 0;
        }
        return super.onScroll(e1, e2, distanceX, distanceY);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent e) {
        switch (e.getAction()) {
            case MotionEvent.ACTION_DOWN: {
                mIgnore = false;
                mNeedToRebase = true;
                mInitialX = e.getX();
                mInitialY = e.getY();
                return false;
            }

            case MotionEvent.ACTION_MOVE: {
                if (!mIgnore) {
                    float deltaX = Math.abs(e.getX() - mInitialX);
                    float deltaY = Math.abs(e.getY() - mInitialY);
                    mIgnore = deltaX < deltaY;
                    return !mIgnore;
                }
                return false;
            }
            default: {
                return super.onInterceptTouchEvent(e);
            }
        }
    }
}