Android：从服务中检测触摸

Question

我正在尝试找到一种方法，以便在我的服务在后台运行时检测用户何时以任何方式触摸屏幕。例如，我希望能够检测用户何时按下主屏幕上的应用程序图标。这是可能的，如果是这样，它将如何实施？

Answer 1

请参阅this服务说明。您应该能够使用Messenger向您的服务发送消息。所以在你的onClick事件中你会打电话给你的信使......例如：

        try {
            Message msg = Message.obtain(null,
                    MessengerService.MSG_BUTTON_CLICKED);
            msg.replyTo = mMessenger;
            mService.send(msg);

            // Give it some value as an example.
            msg = Message.obtain(null,
                    MessengerService.MSG_SET_VALUE, this.hashCode(), 0);
            mService.send(msg);
        } catch (RemoteException e) {
            // In this case the service has crashed before we could even
            // do anything with it; we can count on soon being
            // disconnected (and then reconnected if it can be restarted)
            // so there is no need to do anything here.
        }