android捕获Home键的方法

Level5以上(包含)中，Activity类中有如下方法:
public void onAttachedToWindow ()
Since: API Level 5

Called when the main window associated with the activity has been attached to the window manager. See View.onAttachedToWindow() for more information.

1. private   boolean  catchHomeKey =  false ;  
2.     @Override   
3.         public   void  onAttachedToWindow() {  
4.                 // TODO Auto-generated method stub   
5.             if (catchHomeKey) {  
6.                     this .getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);  
7.             }  
8.                 super .onAttachedToWindow();  
9.         }  
10.         @Override   
11.         public   boolean  onKeyDown( int  keyCode, KeyEvent event) {  
12.                 // TODO Auto-generated method stub   
13.                 if (keyCode == KeyEvent.KEYCODE_HOME) {  
14.                         Log.e(TAG, "Home key down" );  
15.                 }  
16.                 return   super .onKeyDown(keyCode, event);  
17.         } 
    
18. 重写Activity中的onAttachedToWindow方法，设置Type，就能捕获到Home键。
    当不需要捕获时，删除setType这一行就OK