改写Android硬件后退按钮功能

Question

我们可以改写硬件后退按钮功能吗？我有点困惑，这对我有帮助。

Answer 1

@Override public void onBackPressed(){ 
    //do your stuff here 
} 

如果涉及到特定的键东西，那么你可以去这样的：

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.Any_Key_Code) { 
     //your stuff here 
     return true; 
    } 
    return super.onKeyDown(keyCode, event); 
} 

Answer 2

看到这个

public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK) { 

     Toast.makeText(getApplicationContext(), "back button pressed", 
       Toast.LENGTH_SHORT).show(); 
     return true; 
    } 

    return super.onKeyDown(keyCode, event); 
} 

Answer 3

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK) { 
     // do your stuff here 
     return true; 
    } 
    return super.onKeyDown(keyCode, event); 
} 

Answer 4

您还可以覆盖onBackPressed()：

@Override 
public void onBackPressed(){ 
    //Your action 
} 

Answer 5

@Override 
public void onBackPressed() { 
    // Action to be performed 
    super.onBackPressed(); 
}