Android:如何从可穿戴设备获取 Google Fit 数据？

Question

我正在按照 here 中描述的相同步骤进行操作(Google Fit 客户端连接部分工作正常)。

    final DataType dataType=TYPE_STEP_COUNT_DELTA;
    DataSourcesRequest requestData = new DataSourcesRequest.Builder()
            .setDataTypes(dataType)  // At least one datatype must be specified.
            .build();
    Fitness.SensorsApi.findDataSources(mClient, requestData)
            .setResultCallback(new ResultCallback<DataSourcesResult>() {
                @Override
                public void onResult(DataSourcesResult dataSourcesResult) {
                    Log.i(TAG, "Result: " + dataSourcesResult.getDataSources().size() + " sources "
                            + dataSourcesResult.getStatus().toString());
                    for (DataSource dataSource : dataSourcesResult.getDataSources()) {
                        Log.i(TAG, "Data source found: " + dataSource.toString());
                        Log.i(TAG, "Data Source type: " + dataSource.getDataType().getName());
                    }
                }
            });

当我询问数据源时，我只得到一个结果，即智能手机。如果我添加一个监听器，那么我真的会得到数据，所以它可以正常工作。

不过，它还通过手机上的 Android Wear 应用程序连接到 Android Wear 智能 watch Gear Live。两者都安装了 Google Fit，但我想从智能 watch 获取数据。

在我阅读的官方指南中

The Sensors API provides access to raw sensor data streams from sensors available on the Android device and from sensors available in companion devices, such as wearables.

此代码在智能手机上运行，​​因此我认为期望来自配套智能 watch 的数据源也是正确的。但这对我的手机应用程序来说是不可见的。难道我做错了什么？

编辑:

public class MainActivity extends AppCompatActivity {

private final static String TAG = "main_mobile";
private static final int REQUEST_OAUTH = 1;
private final static String DATE_FORMAT = "yyyy.MM.dd HH:mm:ss";
private static final String AUTH_PENDING = "auth_state_pending";
private boolean authInProgress = false;

private GoogleApiClient mClient = null;
private final static DataType dataType = TYPE_STEP_COUNT_DELTA;

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

    if (savedInstanceState != null) {
        authInProgress = savedInstanceState.getBoolean(AUTH_PENDING);
    }
    mClient = new GoogleApiClient.Builder(this)
            .addApi(Fitness.SENSORS_API)
            .addApi(Fitness.RECORDING_API)
            .addApi(Fitness.HISTORY_API)
            .addScope(new Scope(Scopes.FITNESS_ACTIVITY_READ_WRITE))
            .addConnectionCallbacks(connectionCallbacks)
            .addOnConnectionFailedListener(connectionFailCallbacks)
            .build();
}

private void initFitness() {
    DataSourcesRequest requestData = new DataSourcesRequest.Builder()
            .setDataTypes(dataType)
            .build();
    Fitness.SensorsApi.findDataSources(mClient, requestData)
            .setResultCallback(new ResultCallback<DataSourcesResult>() {
                @Override
                public void onResult(DataSourcesResult dataSourcesResult) {
                    Log.i(TAG, "Result: " + dataSourcesResult.getDataSources().size() + " sources " + dataSourcesResult.getStatus().toString());
                    for (DataSource dataSource : dataSourcesResult.getDataSources()) {
                        Log.i(TAG, "\nData source found: \n\t" + dataSource.toString() + "\n\tType: " + dataSource.getDataType().getName());
                    }
                }
            });
}

@Override
protected void onStart() {
    super.onStart();
    Log.i(TAG, "Connecting...");
    mClient.connect();
}

@Override
protected void onStop() {
    super.onStop();
    if (mClient.isConnected()) {
        mClient.disconnect();
    }
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putBoolean(AUTH_PENDING, authInProgress);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_OAUTH) {
        authInProgress = false;
        if (resultCode == RESULT_OK) {
            // Make sure the app is not already connected or attempting to connect
            if (!mClient.isConnecting() && !mClient.isConnected()) {
                mClient.connect();
            }
        }
    }
}

GoogleApiClient.ConnectionCallbacks connectionCallbacks = new GoogleApiClient.ConnectionCallbacks() {
    @Override
    public void onConnected(Bundle bundle) {
        Log.i(TAG, "Connected!!!");
        // Now you can make calls to the Fitness APIs.
        // Put application specific code here.
        initFitness();
    }

    @Override
    public void onConnectionSuspended(int i) {
        // If your connection to the sensor gets lost at some point,
        // you'll be able to determine the reason and react to it here.
        if (i == GoogleApiClient.ConnectionCallbacks.CAUSE_NETWORK_LOST) {
            Log.i(TAG, "Connection lost.  Cause: Network Lost.");
        } else if (i == GoogleApiClient.ConnectionCallbacks.CAUSE_SERVICE_DISCONNECTED) {
            Log.i(TAG, "Connection lost.  Reason: Service Disconnected");
        }
    }
};

GoogleApiClient.OnConnectionFailedListener connectionFailCallbacks = new GoogleApiClient.OnConnectionFailedListener() {
    // Called whenever the API client fails to connect.
    @Override
    public void onConnectionFailed(ConnectionResult result) {
        Log.i(TAG, "Connection failed. Cause: " + result.toString());
        if (!result.hasResolution()) {
            // Show the localized error dialog
            GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), MainActivity.this, 0).show();
            return;
        }
        // The failure has a resolution. Resolve it.
        // Called typically when the app is not yet authorized, and an
        // authorization dialog is displayed to the user.
        if (!authInProgress) {
            try {
                Log.i(TAG, "Attempting to resolve failed connection");
                authInProgress = true;
                result.startResolutionForResult(MainActivity.this, REQUEST_OAUTH);
            } catch (IntentSender.SendIntentException e) {
                Log.e(TAG, "Exception while starting resolution activity", e);
            }
        }
    }
};
}

Answer 1

我没有尝试过。

似乎三星 Gear Live 传感器不支持开箱即用，但您可以通过 software sensors 使其工作:

你的装备直播

如 this SO answer 中所述,

The Samsung Gear Live watch does not advertise itself as a BLE heartrate monitor and therefore does not make the heart rate dataavailable via the normal Bluetooth Low Energy API or the GoogleFit API which is built upon it.

支持的传感器

如 the official docs 中所述,

Google Fit includes support for sensors on the mobile device andBluetooth Low Energy sensors paired with the device. Google Fit letsdevelopers implement support for other sensors and expose them assoftware sensors in Android apps. Sensors supported by Google Fit areavailable to Android apps as data source objects.

可能的解决办法

似乎可以 implement additional software sensors .

(复制的模板在帖子底部，因为它很长)。

您将在 get-heart-rate-from-sensor-samsung-gear-live 之后获得有关可穿戴设备的数据.

模板(来自 https://developers.google.com/fit/android/new-sensors)

将此添加到您的 list 文件中:

<service android:name="com.example.MySensorService"
         android:process=":sensor">
  <intent-filter>
    <action android:name="com.google.android.gms.fitness.service.FitnessSensorService"/>
    <!-- include at least one mimeType filter for the supported data types -->
    <data android:mimeType="vnd.google.fitness.data_type/com.google.heart_rate.bpm"/>
  </intent-filter>
</service>

把这个Service充实起来:

import com.google.android.gms.common.*;
import com.google.android.gms.common.api.*;
import com.google.android.gms.fitness.*;
import com.google.android.gms.fitness.data.*;
import com.google.android.gms.fitness.service.*;
...

public class MySensorService extends FitnessSensorService {

    @Override
    public void onCreate() {
        super.onCreate();
        // 1. Initialize your software sensor(s).
        // 2. Create DataSource representations of your software sensor(s).
        // 3. Initialize some data structure to keep track of a registration for each sensor.
    }

    @Override
    protected List<DataSource> onFindDataSources(List<DataType> dataTypes) {
        // 1. Find which of your software sensors provide the data types requested.
        // 2. Return those as a list of DataSource objects.
    }

    @Override
    protected boolean onRegister(FitnessSensorServiceRequest request) {
        // 1. Determine which sensor to register with request.getDataSource().
        // 2. If a registration for this sensor already exists, replace it with this one.
        // 3. Keep (or update) a reference to the request object.
        // 4. Configure your sensor according to the request parameters.
        // 5. When the sensor has new data, deliver it to the platform by calling
        //    request.getDispatcher().publish(List<DataPoint> dataPoints)
    }

    @Override
    protected boolean onUnregister(DataSource dataSource) {
        // 1. Configure this sensor to stop delivering data to the platform
        // 2. Discard the reference to the registration request object
    }

}