8

当我在 Activity 中使用 GoogleApiClient 但将其移至服务并且未调用 onConnected 时正在工作。

public class StepsMonitoringService extends Service implements GoogleApiClient.ConnectionCallbacks {

private GoogleApiClient mClient;

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

@Override 
public void onCreate() {
    super.onCreate();
    mClient = new GoogleApiClient.Builder(this).addApi(Fitness.HISTORY_API)
            .addScope(new Scope(Scopes.FITNESS_ACTIVITY_READ))
            .addConnectionCallbacks(this).build();
    mClient.connect();  
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    super.onStartCommand(intent, flags, startId);
    return START_STICKY;    
}

@Override
public void onDestroy() {
    super.onDestroy();
    mClient.disconnect();
}

@Override
public void onConnected(Bundle connectionHint) {
   // NOT being called!! WHY??
}

@Override
public void onConnectionSuspended(int cause) {
}

}

有什么想法吗？我究竟做错了什么？有没有人让 GoogleApiClient 在服务中工作？

从 Activity 调用该服务

公共类 MainActivity 扩展 FragmentActivity {

private TextView mStepsView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Intent intent = new Intent(this, StepsMonitoringService.class);
    startService(intent);

    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver, new IntentFilter("StepMonitoringServiceIntent"));

    mStepsView = (TextView) findViewById(R.id.steps);
}

private void displayOnUI(String msg) {
    mStepsView.setText(msg + "\n" + mStepsView.getText());
}

private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        long steps = intent.getLongExtra("steps", 0);
        displayOnUI(steps + " steps");
    }
};

}

在调试期间，我可以看到服务的 onCreate 被调用，但是 onConnected 从未被调用。据我所见，日志中没有什么特别之处。

4

4 回答 4

10

首先实现这些接口：

  1. GoogleApiClient.ConnectionCallbacks
  2. GoogleApiClient.OnConnectionFailedListener

然后你必须将这些方法添加到你的类中：

  1. public void onConnected（最终捆绑包）
  2. 公共无效onConnectionSuspended（最终int i）
  3. 公共无效 onConnectionFailed（最终 ConnectionResult 连接结果）

连接后，将调用OnConnected方法。在这种方法中，您可以做任何您想做的事情，例如获取当前位置、位置地址、在地图上添加标记点等。

但是，如果不建立与Google API 客户端的连接，您将无法做任何事情。要连接到GoogleAPIClient，您可以将此方法添加到您的类中并在您的onCreate方法中调用它。

private synchronized void buildGoogleAPIClient(){
    googleApiclient = new GoogleApiClient.Builder(getActivity())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    googleApiclient.connect();
    Toast.makeText(getActivity(), "connected", Toast.LENGTH_SHORT).show();
}
于 2017-05-24T07:34:51.227 回答
2

添加addOnConnectionFailedListener到GoogleApiClient以跟踪错误。根据addOnConnectionFailedListener将客户端连接到服务时出错时调用的文档。

public class StepsMonitoringService extends Service implements GoogleApiClient.ConnectionCallbacks {

    private GoogleApiClient mClient;

    @Override 
    public void onCreate() {
        super.onCreate();
        mClient = new GoogleApiClient.Builder(this).addApi(Fitness.HISTORY_API)
            .addScope(new Scope(Scopes.FITNESS_ACTIVITY_READ))
            .addConnectionCallbacks(this)
            //Add Connection Failed Listener to track error.
            .addOnConnectionFailedListener(this)
            .build();
        mClient.connect();  
    }

    @Override
    public void onConnected(Bundle connectionHint) {
       // NOT being called!! WHY??
    }

    @Override
    public void onConnectionSuspended(int cause) {
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
         //Called called when there was an error connecting the client to the service. 
        Log.i(LOG_TAG,"onConnectionFailed:"+connectionResult.getErrorCode()+","+connectionResult.getErrorMessage());
    }
}
于 2016-03-30T04:16:16.017 回答
0

当我使用 useDefaultAccount() 创建客户端时，我遇到了同样的问题。然后我用 setAccountName() 替换它并开始工作。我认为由于某些原因 accountpicker 在服务中不起作用，这就是 googleapiclient 的 connect() 静默失败的原因，因为您需要指定用于检索健身信息的帐户。请注意，您的活动中需要有一个帐户选择器，并以某种方式将电子邮件帐户传递给您的服务。

于 2016-09-01T09:29:00.623 回答
0

尝试这个。

public class StepsMonitoringService extends Service implements
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener {

    /**
     * Provides the entry point to Google Play services.
     */
    protected GoogleApiClient mClient;

    /**
     * Builds a GoogleApiClient. Uses the addApi() method to request the
     * Fitness API.
     */
    protected synchronized void buildGoogleApiClient() {
        mClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(Fitness.HISTORY_API)
                .build();
    }

    @Override
    public void onCreate() {
        super.onCreate();
        if (mClient == null) {
            buildGoogleApiClient();
        }
        mClient.connect();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        return START_STICKY;
    }

    @Override
    public void onConnected(Bundle connectionHint) {
        // NOT being called!! WHY??
    }

    @Override
    public void onConnectionSuspended(int cause) {
        mClient.connect();
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        // Called called when there was an error connecting the client to the
        // service.
        Log.i(LOG_TAG,
                "onConnectionFailed:" + connectionResult.getErrorCode() + "," + connectionResult.getErrorMessage());
    }
}
于 2016-03-30T04:35:09.053 回答