如何在Android App中屏蔽（拦截）Home按键及其他按键

编写一个Acitivity，如下所示：
关键点1：屏蔽HOME按键，在onAttachedToWindow中设置FLAG_HOMEKEY_DISPATCHED
关键点2：屏蔽除Power , Home外的按键，覆盖dispatchKeyEvent方法，并返回为true
public class LockByKeyGuard extends Activity {
       @Override
       public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.main);
       }
       @Override
       public void onAttachedToWindow() {
       //关键：在onAttachedToWindow中设置FLAG_HOMEKEY_DISPATCHED
              this.getWindow().addFlags(WindowManager.LayoutParams. FLAG_HOMEKEY_DISPATCHED);
              super.onAttachedToWindow();
       }
 
       @Override
       public boolean dispatchKeyEvent(KeyEvent event) {
              // 返回true，不响应其他key
              return true;
       }

补充：移动开发 , Android ,