使用服务连接发送初始消息

Question

I have an android service, which is connected to a service connection. Upon initialization, I'd like to send a single String, for example "test message" to the Service connection. How would I do this?

    public class exampleService extends Service {
    private final IBinder iBinder = new Messenger(new IncomingHandler(this)).getBinder();
    @Override
    public IBinder onBind(Intent intent) {
        return iBinder;
    }

}

....

private ServiceConnection myService = new ServiceConnection()
    {
        @Override
        public void onServiceConnected(ComponentName componentName, IBinder iBinder)
        {
            Log.i("exampleService", "Binding Connect");
            messenger = new Messenger(iBinder);
        }

        @Override
        public void onServiceDisconnected(ComponentName componentName) {
            messenger = null;
        }
    };

Answer 1

The ServiceConnection monitors the state of the connection to the service, as opposed to communicating information to the service. To communicate with the service, you need to use the binder that is passed as an argument to the onServiceConnected(ComponentName name, IBinder binder) callback.

In your code sample, you are using a Messenger to perform communication instead of directly interacting with the binder. For an example of how to work with Messenger , see the Remote Messenger Service Sample .