- Data provided by the compass sensor denotes the current orientation of the user device, which helps your application accurately navigate for the user.
With the sensor module, a device can obtain sensor data. For example, the device can subscribe to data of the orientation sensor to detect its own orientation, and data of the pedometer sensor to learn the number of steps the user walks every day.
- Data provided by the proximity sensor denotes the distance between the device and a visible object, which enables the device to automatically turn on or off its screen accordingly to prevent accidental touch on the screen.
- Data provided by the barometer sensor helps your application accurately determine the altitude of the device.
- Data provided by the ambient light sensor helps your device automatically adjust its backlight.
- Data provided by the Hall effect sensor implements the smart cover mode of your device.
- Data provided by the heart rate sensor helps your application track the heart health of a user.
- Data provided by the pedometer sensor helps your application obtain the number of steps a user has walked.
- Data provided by the wear detection sensor helps your application detect whether a user is wearing a wearable device.
For details about the APIs, see [Sensor](../reference/apis/js-apis-sensor.md).
## Available APIs
| Module| API| Description|
| -------- | -------- | -------- |
| ohos.sensor | sensor.on(sensorType, callback:AsyncCallback<Response>): void | Subscribes to data changes of a type of sensor.|
| ohos.sensor | sensor.once(sensorType, callback:AsyncCallback<Response>): void | Subscribes to only one data change of a type of sensor.|
| ohos.sensor | sensor.off(sensorType, callback?:AsyncCallback<void>): void | Unsubscribes from sensor data changes.|
| ohos.sensor | sensor.on(sensorId, callback:AsyncCallback<Response>): void | Subscribes to data changes of a type of sensor.|
| ohos.sensor | sensor.once(sensorId, callback:AsyncCallback<Response>): void | Subscribes to only one data change of a type of sensor.|
| ohos.sensor | sensor.off(sensorId, callback?:AsyncCallback<void>): void | Unsubscribes from sensor data changes.|
## How to Develop
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@@ -43,52 +31,49 @@
For details about how to configure a permission, see [Declaring Permissions](../security/accesstoken-guidelines.md).
2. Subscribe to data changes of a type of sensor.
2. Subscribe to data changes of a type of sensor. The following uses the acceleration sensor as an example.
@@ -34,8 +34,7 @@ For details about the APIs, see [AudioRenderer in Audio Management](../reference
1. Use **createAudioRenderer()** to create an **AudioRenderer** instance.
Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. This instance is used to render audio, control and obtain the rendering status, and register a callback for notification.
Set parameters of the **AudioRenderer** instance in **audioRendererOptions**. This instance is used to render audio, control and obtain the rendering status, and register a callback for notification.
