使用Android加速度传感器进行距离测量

public class DistanceMeasurementActivity extends AppCompatActivity implements SensorEventListener {

    private SensorManager sensorManager;
    private Sensor accelerometer;
    private float acceleration = 0.0f;
    private float velocity = 0.0f;
    private float distance = 0.0f;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    }

    @Override
    protected void onResume() {
        super.onResume();
        sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    protected void onPause() {
        super.onPause();
        sensorManager.unregisterListener(this);
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
            // 获取加速度数据
            float x = event.values[0];
            float y = event.values[1];
            float z = event.values[2];

            // 计算重力加速度的影响
            float gravity = Math.abs(x + y + z - SensorManager.GRAVITY_EARTH);

            // 计算净加速度
            acceleration = Math.sqrt(x * x + y * y + z * z) - gravity;

            // 计算速度和距离
            velocity += acceleration * event.timestamp / 1000000000.0f;
            distance += velocity * event.timestamp / 1000000000.0f;
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // 处理精度变化
    }
}