1         @Override
 2         public boolean onTouchEvent(MotionEvent event) {
 3          
 4          switch (event.getAction()&MotionEvent.ACTION_MASK) {
 5          case MotionEvent.ACTION_DOWN:
 6              Log.e(TAG, "按下了");
 7              break;
 8          case MotionEvent.ACTION_POINTER_UP:
 9              isZoom=false;
10              Log.e(TAG, "什么時間觸發的");
11              break;
12          case MotionEvent.ACTION_POINTER_DOWN:
13              isZoom=true;
14              Log.e(TAG, "是我第二個點嗎？");
15              break;
16          case MotionEvent.ACTION_MOVE:
17              if(isZoom){
18                  Log.e(TAG, "多點觸控");
19              }else{
20                  Log.e(TAG, "單點觸控？");
21              }
22     
23              break;
24 
25          default:
26              break;
27          }
28          
29          
30          return super.onTouchEvent(event);
31         }