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;??????@Override??
2. ????????public?void?onAttachedToWindow()?{??????????????????//?TODO?Auto-generated?method?stub??
3. ????????????if(catchHomeKey)?{??????????????????????this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);??
4. ????????????}??????????????????super.onAttachedToWindow();??
5. ????????}??????????@Override??
6. ????????public?boolean?onKeyDown(int?keyCode,?KeyEvent?event)?{??????????????????//?TODO?Auto-generated?method?stub??
7. ????????????????if(keyCode?==?KeyEvent.KEYCODE_HOME)?{??????????????????????????Log.e(TAG,?"Home?key?down");??
8. ????????????????}??????????????????return?super.onKeyDown(keyCode,?event);??
9. ????????}?
   
10. 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

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