Introduction and programming examples related to sensors in Android system

Sensors play an important role in Android development. They can provide the physical status and environmental information of the device, such as acceleration, gyroscope, light, temperature, etc. This article will introduce the basic concepts of sensors in the Android system and provide programming examples to demonstrate how to use the sensor API.

1. Obtaining the Sensor Manager
   To use a sensor, you first need to obtain an instance of the sensor manager. The sensor manager is responsible for managing the sensors on the device and providing an interface to access them. The following code demonstrates how to obtain a sensor manager instance:

SensorManager sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

2. Get the Sensor List
   The Sensor Manager provides methods to get the list of sensors available on the device. Methods can be used getSensorList()to obtain a list of sensors. The following code demonstrates how to get all sensors on the device: