java - OntouchListener 向数组添加太多值

Question

对于我正在开发的应用程序，我需要使用 OntouchListeners，以便按钮的透明区域不可单击，但这引发了我没有预料到的问题。当我按下按钮时，每次都会存储多个值。

这是我的代码:

private final OnTouchListener middle = new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            Bitmap bmp = Bitmap.createBitmap(v.getDrawingCache());
            int color = bmp.getPixel((int) event.getX(), (int) event.getY());
            if (color == Color.TRANSPARENT)
                return false;
            else {


                Random rand = new Random();
                int rndInt = rand.nextInt(5)+ 1 ;   
                list.add(rndInt);
                 Log.d("VALUE", Integer.toString(rndInt));
                 Log.i("VALUE LIST ", list.toString()+" <<<<LIST HERE"); 
                return true;
            }
        }
    };

这是显示问题发生时的日志。从这里我只按了按钮 3 次，所以应该只存储 3 个值:

       03-11 20:23:53.188: D/LOOK(1386): 2
03-11 20:23:53.188: I/VALUE LIST(1386): [2] <<<<LIST HERE
03-11 20:23:53.218: D/-heap(1386): GC_FOR_ALLOC freed 268K, 56% free 8369K/18851K, paused 19ms
03-11 20:23:53.228: D/LOOK(1386): 5
03-11 20:23:53.228: I/VALUE LIST(1386): [2, 5] <<<<LIST HERE
03-11 20:23:53.238: D/LOOK(1386): 5
03-11 20:23:53.238: I/VALUE LIST(1386): [2, 5, 5] <<<<LIST HERE
03-11 20:23:58.698: D/-heap(1386): GC_FOR_ALLOC freed 1849K, 58% free 7942K/18851K, paused 32ms
03-11 20:23:58.698: D/LOOK(1386): 3
03-11 20:23:58.698: I/VALUE LIST(1386): [2, 5, 5, 3] <<<<LIST HERE
03-11 20:23:58.718: D/LOOK(1386): 4
03-11 20:23:58.718: I/VALUE LIST(1386): [2, 5, 5, 3, 4] <<<<LIST HERE
03-11 20:23:58.728: D/LOOK(1386): 3
03-11 20:23:58.738: I/VALUE LIST(1386): [2, 5, 5, 3, 4, 3] <<<<LIST HERE
03-11 20:24:00.218: D/-heap(1386): GC_FOR_ALLOC freed 1708K, 58% free 7942K/18851K, paused 33ms
03-11 20:24:00.228: D/LOOK(1386): 5
03-11 20:24:00.228: I/VALUE LIST(1386): [2, 5, 5, 3, 4, 3, 5] <<<<LIST HERE
03-11 20:24:00.238: D/LOOK(1386): 5
03-11 20:24:00.238: I/VALUE LIST(1386): [2, 5, 5, 3, 4, 3, 5, 5] <<<<LIST HERE
03-11 20:24:00.268: D/-heap(1386): GC_FOR_ALLOC freed 712K, 55% free 8511K/18851K, paused 20ms
03-11 20:24:00.278: D/LOOK(1386): 4
03-11 20:24:00.278: I/VALUE LIST(1386): [2, 5, 5, 3, 4, 3, 5, 5, 4] <<<<LIST HERE

但这里是相同的代码，但在 OnclickListener 中:

 button.setOnClickListener(new OnClickListener(){
                @Override
                public void onClick(View v) {
                    Random rand = new Random();
                    int rndInt = rand.nextInt(5)+ 1 ; 
                     list.add(rndInt);  
                      Log.d("VALUE", Integer.toString(rndInt));
                      Log.i("VALUE LIST ", list.toString()+" <<<<LIST HERE");
                }


            });

按钮像以前一样按了 3 次:

03-11 20:21:26.858: D/LOOK(1216): 2
03-11 20:21:26.858: I/VALUE LIST(1216): [2] <<<<LIST HERE
03-11 20:21:28.288: D/LOOK(1216): 1
03-11 20:21:28.288: I/VALUE LIST(1216): [2, 1] <<<<LIST HERE
03-11 20:21:29.878: D/LOOK(1216): 2
03-11 20:21:29.878: I/VALUE LIST(1216): [2, 1, 2] <<<<LIST HERE

如您所见，效果非常好。如前所述，我需要使用 ontouch，但为什么它会通过按一次按钮添加多个值？我能做些什么来解决这个问题。

Answer 1

if (event.getAction() == MotionEvent.ACTION_DOWN) { //add to your list here} 

很高兴我能提供帮助!