VerticalOnlyNestedScrollView

VerticalOnlyNestedScrollView

/**
 * thanks https://stackoverflow.com/questions/36093384/stop-nestedscrollview-inside-viewpager-to-process-horizontal-scrolls
 */
public class VerticalOnlyNestedScrollView extends NestedScrollView {


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

    private float startX, startY;

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

    public VerticalOnlyNestedScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }


    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (!(ev.getAction() == MotionEvent.ACTION_DOWN) && ev.getHistorySize() > 0) {
            float yVector = ev.getY() - ev.getHistoricalY(0);
            float xVector = ev.getX() - ev.getHistoricalX(0);
            return Math.abs(yVector) + 100 <= Math.abs(xVector) || super.onTouchEvent(ev);
        }

        return super.onTouchEvent(ev);
    }
}