Question

我正在尝试使用数据项将一些字符串发送到我的服装，但我的服装似乎从未接收到任何信号，因为onDataChanged（）从未被调用过。我甚至设置了一个时间戳，以确保数据在发送时始终不同。

我是否有特定的方法将应用程序安装到两台设备上才能使其正常运行？我只是点击运行并选择我的手机，然后切换模块并为我的磨损设备做同样的事情。

以下是我手机上主要活动的代码：

public class HomeActivity extends Activity{

public static String TAG = "HomeActivity";
private GoogleApiClient mGoogleApiClient;


@Override
protected void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.home_view);
    Button mButton = (Button) findViewById(R.id.send_button);
    mButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendData();
        }
    });

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks() {
                @Override
                public void onConnected(Bundle bundle) {

                }

                @Override
                public void onConnectionSuspended(int i) {

                }
            }).addOnConnectionFailedListener(new GoogleApiClient.OnConnectionFailedListener() {
                @Override
                public void onConnectionFailed(ConnectionResult connectionResult) {

                }
            }).addApi(Wearable.API)
            .build();
    mGoogleApiClient.connect();
}

private void sendData(){
    if (mGoogleApiClient!=null){
        return;
    }

    final PutDataMapRequest putRequest = PutDataMapRequest.create("/SAMPLE");
    final DataMap map = putRequest.getDataMap();
    map.putInt("color", Color.RED);
    map.putLong("date", new Date().getTime());
    Wearable.DataApi.putDataItem(mGoogleApiClient, putRequest.asPutDataRequest());
}

}

以下是我的可穿戴设备上的代码：

public class LayoutFaceService extends CanvasWatchFaceService implements DataApi.DataListener{

@Override
public void onCreate(){
    super.onCreate();
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Wearable.API)
            .addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks() {
                @Override
                public void onConnected(Bundle bundle) {
                    Log.i(TAG, "Connected");
                    Wearable.DataApi.addListener(mGoogleApiClient, LayoutFaceService.this);
                }

                @Override
                public void onConnectionSuspended(int i) {

                }
            })
            .addOnConnectionFailedListener(new GoogleApiClient.OnConnectionFailedListener() {
                @Override
                public void onConnectionFailed(ConnectionResult connectionResult) {

                }
            })
            .build();
    mGoogleApiClient.connect();
}


@Override
public void onDataChanged(DataEventBuffer dataEvents) {
    for (DataEvent event : dataEvents) {
        if (event.getType() == DataEvent.TYPE_DELETED) {
            Log.d(TAG, "DataItem deleted: " + event.getDataItem().getUri());
        } else if (event.getType() == DataEvent.TYPE_CHANGED) {
            Log.d(TAG, "DataItem changed: " + event.getDataItem().getUri());
        }
    }

}

我的磨损表明：

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

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

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.DeviceDefault" >
    <service
        android:name=".LayoutFaceService"
        android:label="@string/my_digital_name"
        android:permission="android.permission.BIND_WALLPAPER" >
        <meta-data
            android:name="android.service.wallpaper"
            android:resource="@xml/watch_face" />
        <meta-data
            android:name="com.google.android.wearable.watchface.preview"
            android:resource="@drawable/preview_digital" />
        <meta-data
            android:name="com.google.android.wearable.watchface.preview_circular"
            android:resource="@drawable/preview_digital_circular" />

        <intent-filter>
            <action android:name="android.service.wallpaper.WallpaperService" />
            <category android:name="com.google.android.wearable.watchface.category.WATCH_FACE" />
            <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
        </intent-filter>
    </service>

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
</application>

Answer 1

在sendData()中，您的条件似乎不正确; mGoogleApiClient != null是真的，所以你就在那里退出。解决这个问题，看看你能否进一步发展;可能还有其他问题，但这是第一个明显的问题。如果这不能完全解决您的问题，请确保您的帖子中还包含手机中的清单。

没有在android上调用onDataChanged（）

1 个答案: