借助 传感器 API,您可以实时读取应用中的原始传感器数据。使用 此 API 可以执行以下操作:
- 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。
列出可用的数据源
获取设备和配套设备上所有可用数据源的列表
设备,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));
如需为数据源获取设备信息,请使用
DataSource.getDevice
方法。设备信息有助于与类似设备区分开来
不同设备上的传感器,可显示从传感器到
用户或根据设备以不同方式处理数据。例如,您可以
专门从穿戴式设备上的传感器读取数据
但并非来自手机上同类型的传感器。
获取 Device
例如,对于运行 activity 的设备,请使用
Device.getLocalDevice
方法。如果您想检查某个数据源是否位于
运行您的应用的设备
添加监听器
添加监听器,以从特定健身数据类型或从
特定数据源,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
要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."));