用三根手指觸摸後關閉Android應用程序

Question

我想關閉我的應用程序時，有三個手指觸摸屏幕（就像mac os）。在我的應用程序中，我使用了碎片和查看尋呼機，但我不明白如何使用event.getAction（）和Action Mask。

我所用的兩個

MotionEvent.ACTION_UP 
MotionEvent.ACTION_POINTER_DOWN: 

但他們沒有工作。

當使用不同的ACTION_MASKED應用程序被多次調用時。

int maxPointercount=0; 
int previousPointercount=0; 

public boolean onTouch(View v, MotionEvent event) { 
    int currentpointerCount = event.getPointerCount(); 
    System.out.println("My pointer....." + currentpointerCount); 

    int action = event.getAction() & MotionEvent.ACTION_MASK; 
    System.out.println("pre......."+previousPointercount); 
    System.out.println("max......."+maxPointercount); 

    if(maxPointercount < previousPointercount){ 
     maxPointercount = currentpointerCount; 
    } 

    previousPointercount = currentpointerCount; 

    if(action==MotionEvent.ACTION_) { 
     if(maxPointercount>=3){ 
     maxPointercount = 0; 
     Toast.makeText(MyclassActivity.this,"FingerToched!!"Toast.LENGTH_SHORT).show(); 
     Intent intent = newIntent(MyclassActivity.this,DashboardActivity.class); 
     startActivity(intent); 
     finish(); 
     //your code that will run 1 time 
     } 
     maxPointercount = 0; 
     previousPointercount = 0;  
    } 
    return super.onTouchEvent(event); 
} 

Answer 1

這應該有效。

@Override 
    public boolean dispatchTouchEvent(MotionEvent event) { 
     int currentpointerCount = event.getPointerCount(); 
     Log.d("hi", "My pointer....." + currentpointerCount); 

     int action = event.getAction() & MotionEvent.ACTION_MASK; 
     System.out.println("pre......."+previousPointercount); 
     System.out.println("max......."+maxPointercount); 

     if(maxPointercount < previousPointercount){ 
      maxPointercount = currentpointerCount; 
     } 

     previousPointercount = currentpointerCount; 

     if(action==MotionEvent.ACTION_UP) {    
      if(maxPointercount==3){   
      finish(); 
      //your code that will run 1 time 
      } 
      maxPointercount = 0; 
      previousPointercount = 0;  
     } 
     return true; 
     /** This worked for OP's specific case 
     return super.dispatchTouchEvent(event); 
     **/ 
    }