onResize事件在我提起其中一个手指之前完成

Question

我使用下面的代码来处理android上的resize(pinch)事件：

//my custom framelayout supporting resize functionality
ScalingFrameLayout pieceContainer=(ScalingFrameLayout)fragment.getView().findViewById(R.id.pieceContainer);
//set onResize handler
setScaleListener(pieceContainer.getContext());
//tonnel touch events to gesture detector
pieceContainer.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            mScaleDetector.onTouchEvent(event);
            return true;
        }
    });
...
//somewhere in the class
private ScaleGestureDetector mScaleDetector;
//
private void setScaleListener(Context context) {
mScaleDetector= new ScaleGestureDetector(context, new ScaleGestureDetector.OnScaleGestureListener() {
        @Override
        public void onScaleEnd(ScaleGestureDetector detector) {
            Log.d("onScaleEnd", "end");
        }
        @Override
        public boolean onScaleBegin(ScaleGestureDetector detector) {
            Log.d("onScaleBegin", "begin");
            return true;
        }
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            Log.d("onScale", "zoom ongoing, scale: " + detector.getScaleFactor());
            return false;
        }
    });
}

问题是，当我做放大手势时(例如)，这段代码调用onScaleBegin，然后调用5-6次onScale，最后调用onScaleEnd。虽然我没有从screen.Is上抬起任何手指，但有什么方法可以阻止ScaleGestureDetector调用onScaleEnd，并让它一直跟踪我的缩放手势，直到我释放屏幕？

Answer 1

通过在frameLayout上实现自定义的双向滚动视图，解决了这一问题。