private void warmUpScaleDetector ( ) { long time = System . currentTimeMillis ( ) ; MotionEvent event = MotionEvent . obtain ( time , time , MotionEvent . ACTION_CANCEL , 0f , 0f , 0 ) ; onTouchEvent ( event ) ; event . recycle ( ) ; }
Scale detector is a little buggy when first time scale is occurred . So we will feed it with fake motion event to warm it up .