原生Android通过scale进行放大缩小_android scaley

        var on = 0.toLong()
        var bag = true
        
   imageView.setOnTouchListener { v, event ->
           when (event.action) {
               MotionEvent.ACTION_DOWN -> {
                   if (System.currentTimeMillis() - on < 500) {
                       if (bag) {
                           imageView3.scaleX = 2f
                           imageView3.scaleY = 2f
                            bag  = !bag
                       }else{
                           imageView3.scaleX = 1f
                           imageView3.scaleY = 1f
                           bag  = !bag
                       }
                   }
                   on = System.currentTimeMillis()
               }
           }
           true
       }
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