应用程序监听不了Android 机的HOME KEY事件。 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { // TODO Auto-generated method stub if(keyCode==3)//HOME键码为3 { HomeKeyNum+=1; Log.i("gogler", "home key pressed time is: "+HomeKeyNum); } return super.onKeyDown(keyCode, event); }实验结果没有预期日志输出,把键码换成BACK键码4则可以监听到。官方解释:Key code constant: Home key. This key is handled by the framework and is never delivered to applications.