实现 Android 启动和停止传感器

Question

我正在研究iPhone上的传感器操作，想知道如何在Android中实现启动和停止传感器操作。我在这个论坛上搜索过，但没有找到确定的答案。有人有什么线索吗？

- user788511

Answer 1

在活动中使用传感器很容易，基本上你需要：

1º 声明你需要的传感器。

    // Sensor static
static private SensorManager mSensorManager;
static private List<Sensor> deviceSensors;
static private Sensor mAccelerometer;
static private Sensor mGravity;
static private Sensor mGyroscope;
static private Sensor mLinearAcceleration;
static private Sensor mRotationVector;
static private Sensor mOrientation;
static private Sensor mMagneticField;
static private Sensor mProximity;
static private Sensor mPressure;
static private Sensor mLight;

2º 您必须在所有onCreate中初始化，就像这样：

       // Add sensor manager STATIC (only 1 time)
    mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    deviceSensors = mSensorManager.getSensorList(Sensor.TYPE_ALL);


    // Load default Sensors
    loadDefaultSensors();

    // Set Sensor Listener
    setAllSensorListener();

loadDefaultSensors 的第三个参数类似于这样：

        mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    mGravity = mSensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY);
    mGyroscope = mSensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);
    mLinearAcceleration = mSensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION);
    mRotationVector = mSensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR);
    mOrientation = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
    mMagneticField = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
    mProximity = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
    mPressure = mSensorManager.getDefaultSensor(Sensor.TYPE_PRESSURE);
    mLight = mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);

第四步，设置监听器：

        mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mGravity, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mGyroscope, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mLinearAcceleration, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mRotationVector, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mOrientation, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mMagneticField, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mProximity, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mPressure, SensorManager.SENSOR_DELAY_NORMAL);
    mSensorManager.registerListener(this, mLight, SensorManager.SENSOR_DELAY_NORMAL);

如果您需要节省CPU等资源，可以在onPause中取消监听器，然后在onResume中重新注册。

        mSensorManager.unregisterListener(this);

我希望这有助于开始...... 你需要知道的一切，在这里

- vgonisanz

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如果我有机会给你100个+1，我会这样做。在整个SO中，没有人曾经说过要使用unregisterListener。 - VenomVendor