android - 从 Google Fit API Android 获取当前 Activity

Question

我正在开发演示应用程序以使用 Google Fit 获取当前 Activity 样本。我可以正确地获得速度和距离。但它并没有经常返回“in_vehicle”或“骑自行车”状态，尽管我处于相同状态。找到相同的附加屏幕截图。我得到了 59.40KM/H(36.91 M/h) 的速度，当时它没有返回“in_vehicle” Activity 状态。

请提供相同的解决方案/反馈。

代码:

@Override
 public void onDataPoint(DataPoint dataPoint) {
     for (Field field : dataPoint.getDataType().getFields()) {
        Value val = dataPoint.getValue(field);
           if(field.getName().trim().toLowerCase().equals("activity"))
                    {
                        if(FitnessActivities.getName(Integer.parseInt(val.toString())).equals("biking"))
                        {
                            strState = "Cycling";
                        }
                        else if(FitnessActivities.getName(Integer.parseInt(val.toString())).equals("in_vehicle"))
                        {
                            strState = "Automotive";
                        }
                        else if(FitnessActivities.getName(Integer.parseInt(val.toString())).equals("walking"))
                        {
                            strState = "Walking";
                        }
                        else
                        {
                            strState = "Not Moving";
                        }
                    }
            }
}

谢谢。

Answer 1

您可以在此处找到我创建的示例项目。

https://github.com/cyfung/ActivityRecognitionSample

重要说明:您可能无法像您请求的那样频繁地获取数据!

Beginning in API 21, activities may be received less frequently than the detectionIntervalMillis parameter if the device is in power save mode and the screen is off.

关键组件:

在 onCreate 中创建 GoogleApiClient

mGoogleApiClient =
        new GoogleApiClient.Builder(this).addApi(ActivityRecognition.API)
            .addConnectionCallbacks(this).addOnConnectionFailedListener(this).build();

在 onStart 中连接和断开 api 客户端和 onStop按照 Google Api 文档中的建议。

  @Override
  protected void onStart() {
    super.onStart();
    mGoogleApiClient.connect();
    mStatusView.setText("connecting");
  }

  @Override
  protected void onStop() {
    super.onStop();
    mGoogleApiClient.disconnect();
    mStatusView.setText("disconnected");
  }

开始 Activity 识别(不应在 Google Api 连接之前调用)。使用 PendingIntent.getService创建挂起的 Intent 作为回调。

final PendingResult<Status>
    statusPendingResult =
    ActivityRecognition.ActivityRecognitionApi
        .requestActivityUpdates(mGoogleApiClient, DETECT_INTERVAL, PendingIntent
            .getService(this, 0, new Intent(this, ActivityDetectionService.class),
                          PendingIntent.FLAG_UPDATE_CURRENT));
statusPendingResult.setResultCallback(this);

IntentService是建议回调的标准方法

public class ActivityDetectionService extends IntentService {

  protected static final String TAG = "activityDetectionService";

  public ActivityDetectionService() {
    super(TAG);
  }

  @Override
  protected void onHandleIntent(Intent intent) {
    final ActivityRecognitionResult
        activityRecognitionResult =
        ActivityRecognitionResult.extractResult(intent);
    if (activityRecognitionResult == null) {
      return;
    }

    //process the result here, pass the data needed to the broadcast
    // e.g. you may want to use activityRecognitionResult.getMostProbableActivity(); instead
    final List<DetectedActivity>
        probableActivities =
        activityRecognitionResult.getProbableActivities();

    sendBroadcast(MainActivity.newBroadcastIntent(probableActivities));
  }
}

在 list 中注册服务。

    <service
            android:name=".ActivityDetectionService"
            android:exported="false">
    </service>

要使用API​​，您还需要在 list 中添加以下内容。

<uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION"/>

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

为了将数据返回到 Activity 中，我使用了在 onCreate 中创建的 BroadcastReceiver

mBroadcastReceiver = new BroadcastReceiver() {

  @Override
  public void onReceive(Context context, Intent intent) {
    ...
  }
}

在onResume中注册和注销和 onPause分别。

  @Override
  protected void onResume() {
    super.onResume();
    registerReceiver(mBroadcastReceiver, newBroadcastIntentFilter());
  }

  @Override
  protected void onPause() {
    super.onPause();
    unregisterReceiver(mBroadcastReceiver);
  }