Android OverScroller and performance

Question

I have used OverScroller for implementing scroll of my view.

Here is some code:

@Override
protected void onDraw(Canvas canvas) {
    if (scroller.computeScrollOffset()){
        int x = scroller.getCurrX();
        int y = scroller.getCurrY();
        scrollTo(x, y);

        ViewCompat.postInvalidateOnAnimation(this);
    }

    super.onDraw(canvas);
}

public void open(){
    scroller.startScroll(0, 0, 0, -mContent.getMeasuredHeight(), ANIMATION_TIME);
    invalidate();
}

public void close(){
    scroller.startScroll(0, getScrollY(), 0, mContent.getMeasuredHeight(), ANIMATION_TIME);
    invalidate();
}

It works fine. But on device with Full HD screen (Sony xperia Z) the method onDraw calls 4 times. On "Samsung Galaxy Note 2" it calls about 10 times. Hence on xperia i see lags. What can i do to improve performance ?

UPD: Here is full code http://xsnippet.org/359714

Answer 1

you should override computeScroll() for things like that and not onDraw()