连接显示为空，磨损未从 DataLayer 接收

Question

对于我使用 Wear 的第一个项目，我从简单开始 - 使用 DataLayer 将一个字符串从 Android 发送到 Wear。这实际上是一个更大项目的测试，我需要做的就是有一个同步的字符串。

在运行项目上，Log一直显示字符串发送成功，"onConnected"一直显示null。不用说，手表已连接。我认为连接是问题所在，因为它可以解释为什么没有 happens/runs 磨损。调试：我正在使用通过 USB 连接的 Moto Z Play，以及通过蓝牙调试连接的 Lg G Watch。安装佩戴没有问题。然而，连接始终显示为空。

我有一个 onDataChanged 服务，它在检测到更改时通过 Toast 显示字符串 ("Testing")。这永远不会发生。如上所述，我认为这是一个连接问题，但也可能是使用不当造成的。抱歉，我是一名自学成才的高中生。感谢任何帮助或澄清。

Phone Activity:

public class MainActivity extends AppCompatActivity  implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {

    //Global variables.
    private static final int importFileCode = 1;

    //Used for Wear DataLayer
    private static final String TAG = "MainActivity";
    private GoogleApiClient mGoogleApiClient;
    private boolean mResolvingError = false;

    //Method001: Creates the interfaces, calls necessary methods.
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        //Used to initiate GoogleAPiClient
        initiateAPI();

        //Used to test the data layer
        sendAccsRequest("Testing");
    }

  @Override
    public void onConnected(Bundle connectionHint) {
        Log.d(TAG, "onConnected: " + connectionHint);
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.d(TAG, "onConnectionSuspended: " + i);
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Log.d(TAG, "onConnectionFailed: " + connectionResult);
    }

    //Initiates the google api client.
    public void initiateAPI () {
        //GoogleApiClient used for connection w/the phone
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(Wearable.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
        mGoogleApiClient.connect();
    }

    //Used to send the string with info to wear, hopefully.
    public void sendAccsRequest(String allInfo) {
        //Creates a request with a unique key
        PutDataMapRequest putDataMapRequest = PutDataMapRequest.create("/allInfo");

        //Inserts the variables using the keys
        putDataMapRequest.getDataMap().putString("strAllInfo", allInfo);

        PutDataRequest request = putDataMapRequest.asPutDataRequest();
        Wearable.DataApi.putDataItem(mGoogleApiClient, request)
                .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
                    @Override
                    public void onResult(DataApi.DataItemResult dataItemResult) {
                        if (!dataItemResult.getStatus().isSuccess()) {
                            Log.e("sendAccs", "Failed to send accs");
                        } else {
                            Log.d("sendAccs", "Successfully sent accs");
                        }
                    }
                });
    }

}

穿Activity:

public class Main extends WearableActivity implements GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener,
        DataApi.DataListener, MessageApi.MessageListener, CapabilityApi.CapabilityListener {

    private GoogleApiClient mGoogleApiClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list);
        final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);

        //Initiates the google api client
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(Wearable.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

        // Enables Always-on
        setAmbientEnabled();
        }

    @Override
    public void onConnected(Bundle connectionHint) {
        Log.d("onConnected(): ","Successfully connected to Google API client");
        Wearable.DataApi.addListener(mGoogleApiClient, this);
        Wearable.MessageApi.addListener(mGoogleApiClient, this);
        Wearable.CapabilityApi.addListener(
                mGoogleApiClient, this, Uri.parse("wear://"), CapabilityApi.FILTER_REACHABLE);
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.e("onConnectionSuspended()",": Connection to Google API client was suspended");
    }


    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        Log.e("onConnectionFailed(): ","Failed to connect, with result: " + connectionResult);
    }

    @Override
    public void onDataChanged(DataEventBuffer dataEventBuffer) {
        for (DataEvent event : dataEventBuffer) {
            if (event.getType() == DataEvent.TYPE_CHANGED) {
                String path = event.getDataItem().getUri().getPath();
                if (dataChangeService.accPath.equals(path)) {
                    DataMapItem dataMapItem = DataMapItem.fromDataItem(event.getDataItem());
                    String allInfo = dataMapItem.getDataMap()
                            .getString("strAllInfo");

                    //Prints out received string
                    Log.e("strAllInfo: ", allInfo);

                }
            } else {
                Log.e("Unknown data event type", "Type = " + event.getType());
            }
        }
    }

    @Override
    public void onMessageReceived(MessageEvent messageEvent) {

    }

    @Override
    public void onCapabilityChanged(CapabilityInfo capabilityInfo) {

    }
}

dataChangeService（磨损）：

 public class dataChangeService extends WearableListenerService {

    GoogleApiClient mGoogleApiClient;

    public static final String accPath = "/allInfo";

    @Override
    public void onCreate() {
        super.onCreate();
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(Wearable.API)
                .build();
        mGoogleApiClient.connect();
    }

        @Override
        public void onDataChanged(DataEventBuffer dataEvents) {
            Log.d("dataChangeService", "Successfully running");
            for (DataEvent dataEvent : dataEvents) {
                if (dataEvent.getType() == DataEvent.TYPE_CHANGED) {
                    DataMap dataMap = DataMapItem.fromDataItem(dataEvent.getDataItem()).getDataMap();
                    String path = dataEvent.getDataItem().getUri().getPath();
                    if (path.equals("/allInfo")) {
                        String allInfo = dataMap.getString("strAllInfo");
                        Toast.makeText(dataChangeService.this, "AllInfo: " + allInfo, Toast.LENGTH_SHORT).show();
                    }
                }
            }
        }
    }

Android 磨损清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="noobyguy.testapp">

    <uses-feature android:name="android.hardware.type.watch" />

    <uses-permission android:name="android.permission.WAKE_LOCK" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@android:style/Theme.DeviceDefault">
        <uses-library
            android:name="com.google.android.wearable"
            android:required="true" />
        <!--
               Set to true if your app is Standalone, that is, it does not require the handheld
               app to run.
        -->
        <meta-data
            android:name="com.google.android.wearable.standalone"
            android:value="true" />

        <activity
            android:name=".Main"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <meta-data android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <service
            android:name=".dataChangeService"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name = "come.google.android.gms.wearable.BIND_LISTENER"/>
            </intent-filter>
        </service>
    </application>

</manifest>

Answer 1

感谢您的帮助！不过说真的，我确实最终弄清楚了这个问题。

穿其实没用mGoogleApiClient.connect();

但主要是清单问题，因为 BIND_LISTENER（由 Udacity 建议）需要替换为以下内容；

<service
            android:name=".dataChangeService"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.google.android.gms.wearable.DATA_CHANGED" />
                <data android:scheme="wear" android:host="*" android:pathPrefix="/allInfo"/>
            </intent-filter>

连接显示为空，磨损未从 DataLayer 接收

Connection showing null, wear not receiving from DataLayer

android

bluetooth

google-datalayer

wear-os