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.

 private   boolean  catchHomeKey =  false ;
     @Override
         public   void  onAttachedToWindow() {
                 // TODO Auto-generated method stub
             if (catchHomeKey) {
                     this .getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
             }
                 super .onAttachedToWindow();
         }
         @Override
         public   boolean  onKeyDown( int  keyCode, KeyEvent event) {
                 // TODO Auto-generated method stub
                 if (keyCode == KeyEvent.KEYCODE_HOME) {
                         Log.e(TAG, "Home key down" );
                 }
                 return   super .onKeyDown(keyCode, event);
         }
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