我有一个简单的应用程序，我在其中执行以下操作:publicvoidonClick(Viewv){switch(v.getId()){caseR.id.buttonup:onButtonUp();break;caseR.id.buttondown:onButtonDown();break;}}publicbooleandispatchKeyEvent(KeyEventevent){intkeyCode=event.getKeyCode();switch(keyCode){caseKeyEvent.KEYCODE_VOLUME_UP:onButtonUp();returntrue;case