返回键, 长按事件
在Activity中重写方法
@Override public boolean onKeyLongPress(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_CALL) { // a long press of the call key. // do our work, returning true to consume it. by // returning true, the framework knows an action has // been performed on the long press, so will set the // canceled flag for the following up event. return true; } return super.onKeyLongPress(keyCode, event); }