WearableListenerService 收不到数据

Question

我正在尝试将传感器数据从我的穿戴式设备发送到手持设备。问题是我的 WearableListenerService 的 onMessageReceived 函数从未被调用，即使它被创建。 wear 和 mobile 应用程序的包名称相同，清单文件中的服务条目也是如此：

<service
    android:name=".WatchDataReceiver"
    android:enabled="true"
    android:exported="true" >
</service>

在我的掌上电脑的 MainActivity 中：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        startService(new Intent(this, WatchDataReceiver.class));

        setContentView(R.layout.activity_fullscreen);
        ...
}

在我的掌上电脑上，服务：

public class WatchDataReceiver extends WearableListenerService {

    @Override
    public void onCreate() {
        super.onCreate();
        Log.i(WatchDataReceiver.class.getSimpleName(), "WEAR create");
    }

    @Override
    public void onDataChanged(DataEventBuffer dataEvents) {
        Log.i(WatchDataReceiver.class.getSimpleName(), "WEAR Data changed " );
    }

    @Override
    public void onMessageReceived(MessageEvent messageEvent) {
        Log.i(WatchDataReceiver.class.getSimpleName(), "WEAR Message " + messageEvent.getPath());
    }
}

关于watch/wear：

 public class MainActivity extends Activity implements SensorEventListener {

    private static final String LOG_TAG = "Watch: ";

    private SensorManager   sensorManager;
    private Sensor          accelerometer;

    private GoogleApiClient mGoogleApiClient;
    private String msg = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
        stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
            @Override
            public void onLayoutInflated(WatchViewStub stub) {
                mTextView = (TextView) stub.findViewById(R.id.text);
            }
        });

        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_FASTEST);

        if (accelerometer != null) {
            Log.v(LOG_TAG, "Accelerometer registered!");
        }
        else {
            Log.v(LOG_TAG, "Accelerometer _not_ registered!");
        }

        mGoogleApiClient = new GoogleApiClient.Builder(this).addApi(Wearable.API).build();
        mGoogleApiClient.connect();
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if(event.sensor.getType() == Sensor.TYPE_ACCELEROMETER && event.values.length > 0) {
            double value_x = event.values[0];
            double value_y = event.values[1];
            double value_z = event.values[2];

            msg = Double.toString(value_x) + ";" + Double.toString(value_y) + ";" + Double.toString(value_z);
            sendMessageToHandheld(msg);
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        //TODO
    }

    private void sendMessageToHandheld(String msg) {
        if (mGoogleApiClient == null)
            return;

        final String message = msg;

        Log.d(LOG_TAG,"sending a message to handheld: "+message);

        // use the api client to send the heartbeat value to our handheld
        final PendingResult<NodeApi.GetConnectedNodesResult> nodes = Wearable.NodeApi.getConnectedNodes(mGoogleApiClient);
        nodes.setResultCallback(new ResultCallback<NodeApi.GetConnectedNodesResult>() {
            @Override
            public void onResult(NodeApi.GetConnectedNodesResult result) {
                final List<Node> nodes = result.getNodes();
                if (nodes != null) {
                    for (int i=0; i<nodes.size(); i++) {
                        final Node node = nodes.get(i);
                        Wearable.MessageApi.sendMessage(mGoogleApiClient, node.getId(), message, null);
                    }
                }
            }
        });
    }
}

根据 LogCat 找到了正确的手持设备，因为在 sendMessageToHandheld 中，紧接在实际 sendMessage 之后，它使用节点名称执行 Log.d。我错过了什么？

Answer 1

您必须将此 IntentFilter 添加到您的服务中：

<intent-filter>
    <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
</intent-filter>

它告诉系统处理 Service 生命周期（即在需要时启动它）。

WearableListenerService 收不到数据

WearableListenerService doesn't receive data

wear-os