Android double click the implementation method to exit

This article illustrates the implementation of Android's double-click exit. Share to everybody for everybody reference. Specific implementation methods are as follows:

Method 1:

Override the onBackPressed method to directly listen for the return key (2.0 or above is recommended for higher versions)

@Override  

public void onBackPressed() {  

      

       long currentTime = System.currentTimeMillis();    

       if((currentTime-touchTime)>=waitTime) {    

        // let Toast Display time and wait time are the same   

           Toast.makeText(this, " then 1 Time to quit ", (int)waitTime).show();    

           touchTime = currentTime;    

       }else {    

           finish();    

       }    

}

Method 2: (Recommended)

long waitTime = 2000;    

long touchTime = 0;   

@Override  

public boolean onKeyDown(int keyCode, KeyEvent event) {  

    if(event.getAction() == KeyEvent.ACTION_DOWN && KeyEvent.KEYCODE_BACK == keyCode) {    

        long currentTime = System.currentTimeMillis();    

        if((currentTime-touchTime)>=waitTime) {    

            // let Toast Display time and wait time are the same   

            Toast.makeText(this, " then 1 Time to quit ", (int)waitTime).show();    

            touchTime = currentTime;    

        }else {    

            finish();    

        }    

        return true;    

    }    

    return super.onKeyDown(keyCode, event);    

}

I hope this article has been helpful for your Android programming.