我需要获得设备导向.我知道通常使用TYPE_ACCELEROMETER和TYPE_MAGNETIC_FIELD传感器.我的问题是SensorManager.getDefaultSensor为地磁传感器返回null.它也为TYPE_ORIENTATION传感器返回null.
@H_301_2@manager = (SensorManager) getSystemService(SENSOR_SERVICE);
Sensor sensorAcc = manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),//normal object
sensorMagn = manager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD); //null
orientationListener = new OrientationSensorListener();
manager.registerListener(orientationListener,sensorAcc,10);
manager.registerListener(orientationListener,sensorMagn,10);
解决方法
要获得设备不平坦时的旋转角度,请执行OrientationEventListener. onOrientationChanged将给出设备方向.详见
https://developer.android.com/reference/android/view/OrientationEventListener.html.
