访问原始传感器数据

借助 Sensors API，您可以实时读取应用中的原始传感器数据。使用此 API 可执行以下操作：

  • 列出设备和配套设备上可用的数据源。
  • 注册监听器以接收原始传感器数据。
  • 取消注册监听器，使其不再接收原始传感器数据。

列出可用数据源

如需获取设备和配套设备上所有可用数据源的列表，请使用 SensorsClient.findDataSources 方法：

Kotlin

private val fitnessOptions = FitnessOptions.builder().addDataType(DataType.TYPE_STEP_COUNT_DELTA).build()

// Note: Fitness.SensorsApi.findDataSources() requires the
// ACCESS_FINE_LOCATION permission.
Fitness.getSensorsClient(requireContext(), GoogleSignIn.getAccountForExtension(requireContext(), fitnessOptions))
    .findDataSources(
        DataSourcesRequest.Builder()
            .setDataTypes(DataType.TYPE_STEP_COUNT_DELTA)
            .setDataSourceTypes(DataSource.TYPE_RAW)
            .build())
    .addOnSuccessListener { dataSources ->
        dataSources.forEach {
            Log.i(TAG, "Data source found: ${it.streamIdentifier}")
            Log.i(TAG, "Data Source type: ${it.dataType.name}")

            if (it.dataType == DataType.TYPE_STEP_COUNT_DELTA) {
                Log.i(TAG, "Data source for STEP_COUNT_DELTA found!")

                ...
            }
        }
    }
    .addOnFailureListener { e ->
        Log.e(TAG, "Find data sources request failed", e)
    }

Java

FitnessOptions fitnessOptions = FitnessOptions.builder().addDataType(DataType.TYPE_STEP_COUNT_DELTA).build();

// Note: Fitness.SensorsApi.findDataSources() requires the
// ACCESS_FINE_LOCATION permission.
Fitness.getSensorsClient(getApplicationContext(), GoogleSignIn.getAccountForExtension(getApplicationContext(), fitnessOptions))
        .findDataSources(
                new DataSourcesRequest.Builder()
                        .setDataTypes(DataType.TYPE_STEP_COUNT_DELTA)
                        .setDataSourceTypes(DataSource.TYPE_RAW)
                        .build())
        .addOnSuccessListener(dataSources -> {
            dataSources.forEach(dataSource -> {
                Log.i(TAG, "Data source found: ${it.streamIdentifier}");
                Log.i(TAG, "Data Source type: ${it.dataType.name}");

                if (dataSource.getDataType() == DataType.TYPE_STEP_COUNT_DELTA) {
                    Log.i(TAG, "Data source for STEP_COUNT_DELTA found!");
                    ...
                }
            })})
        .addOnFailureListener(e ->
            Log.e(TAG, "Find data sources request failed", e));

如需获取数据源的设备相关信息，请使用 DataSource.getDevice 方法。设备信息有助于区分不同设备上的类似传感器、向用户显示来自传感器的设备信息，或根据设备以不同方式处理数据。例如，您可能想要专门从穿戴式设备上的传感器读取数据，而不是从手机上同一类型的传感器读取数据。

如需获取运行 activity 的设备的 Device 实例，请使用 Device.getLocalDevice 方法。当您想要检查数据源是否与您的应用运行在同一设备上时，这非常有用。

添加监听器

如需添加监听器来接收特定健身数据类型的原始数据或从特定数据源接收原始数据，请使用 SensorsClient.add 方法：

Kotlin

val listener = OnDataPointListener { dataPoint ->
        for (field in dataPoint.dataType.fields) {
            val value = dataPoint.getValue(field)
            Log.i(TAG, "Detected DataPoint field: ${field.name}")
            Log.i(TAG, "Detected DataPoint value: $value")
        }
    }

Fitness.getSensorsClient(this, GoogleSignIn.getAccountForExtension(this, fitnessOptions))
    .add(
        SensorRequest.Builder()
            .setDataSource(dataSource) // Optional but recommended for custom
            // data sets.
            .setDataType(dataType) // Can't be omitted.
            .setSamplingRate(10, TimeUnit.SECONDS)
            .build(),
        listener
    )
    .addOnSuccessListener {
    	Log.i(TAG, "Listener registered!")
    }
    .addOnFailureListener {
    	Log.e(TAG, "Listener not registered.", task.exception)
    }

Java

OnDataPointListener listener = dataPoint -> {
    for (Field field : dataPoint.getDataType().getFields()) {
        Value value = dataPoint.getValue(field);
        Log.i(TAG, "Detected DataPoint field: ${field.getName()}");
        Log.i(TAG, "Detected DataPoint value: $value");
    }
};
Fitness.getSensorsClient(this, GoogleSignIn.getAccountForExtension(this, fitnessOptions))
        .add(
                new SensorRequest.Builder()
                        .setDataSource(dataSource) // Optional but recommended
                        // for custom data sets.
                        .setDataType(dataType) // Can't be omitted.
                        .setSamplingRate(10, TimeUnit.SECONDS)
                        .build(),
                listener
        )
        .addOnSuccessListener(unused ->
                Log.i(TAG, "Listener registered!"))
        .addOnFailureListener(task ->
    Log.e(TAG, "Listener not registered.", task.getCause()));
}

移除监听器

如需从原始数据更新中移除监听器，请使用 SensorsClient.remove 方法：

Kotlin

Fitness.getSensorsClient(this, GoogleSignIn.getAccountForExtension(this, fitnessOptions))
    .remove(listener)
    .addOnSuccessListener {
    	Log.i(TAG, "Listener was removed!")
    }
    .addOnFailureListener {
    	Log.i(TAG, "Listener was not removed.")
    }

Java

Fitness.getSensorsClient(this, GoogleSignIn.getAccountForExtension(this, fitnessOptions))
        .remove(listener)
        .addOnSuccessListener(unused ->
                Log.i(TAG, "Listener was removed!"))
        .addOnFailureListener(e ->
                Log.i(TAG, "Listener was not removed."));