支持更多传感器

Google Fit 会自动支持实现标准 Bluetooth Low Energy GATT 配置文件的健身设备。如果您的设备 未实现上述某个配置文件，您可以创建一个 Android 应用， 管理与健身设备的通信，并为其公开 将 Google 健身用作软件传感器。您还可以在应用中公开自定义软件传感器。

要在您的应用中创建软件传感器，您需要扩展 FitnessSensorService 类，并在清单文件中将其声明为服务。当用户安装您的 应用，那么 Google 健身会将您的软件传感器提供给其他应用。 当应用注册接收来自应用中的软件传感器的数据时， Google 健身会绑定到您的服务。

声明传感器服务

要定义软件传感器，请声明 FitnessSensorService 在应用的清单文件中：

<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>

此示例中的服务在单独的进程中运行，该进程由 android:process 属性。如需了解详情，请参阅进程。

实现传感器服务

如需实现软件传感器，请扩展 FitnessSensorService 类并 实现其抽象方法。实现的具体细节取决于您的具体用例，但以下示例提供了一些一般准则：

class MySensorService : FitnessSensorService() {
    override fun 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 fun onFindDataSources(dataTypes: List<DataType>): List<DataSource> {
        // 1. Find which of your software sensors provide the data types requested.
        // 2. Return those as a list of DataSource objects.
    }

    override fun onRegister(request: FitnessSensorServiceRequest): Boolean {
        // 1. Determine which sensor to register with request.dataSource.
        // 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.dispatcher.publish(dataPoints)
    }

    override fun onUnregister(dataSource: DataSource): Boolean {
        // 1. Configure this sensor to stop delivering data to the platform
        // 2. Discard the reference to the registration request object
    }
}

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.
    }

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

    @Override
    public boolean onRegister(
            @NonNull FitnessSensorServiceRequest fitnessSensorServiceRequest) {
        // 1. Determine which sensor to register with request.dataSource.
        // 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(dataPoints);
    }

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