1.实现SensorEventListener
public class OrientationListener implements SensorEventListener {
private int mOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
private OnOrientationChangeListener mListener;
public OrientationListener(OnOrientationChangeListener listener) {
mListener = listener;
}
@Override
public void onSensorChanged(SensorEvent event) {
if (Sensor.TYPE_ACCELEROMETER != event.sensor.getType()) {
return;
}
float[] values = event.values;
float x = values[0];
float y = values[1];
int newOrientation;
if (x < 4.5 && x >= -4.5 && y >= 4.5) {
newOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
} else if (x >= 4.5 && y < 4.5 && y >= -4.5) {
newOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
} else if (x <= -4.5 && y < 4.5 && y >= -4.5) {
newOrientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
}else {
newOrientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
}
if (mOrientation != newOrientation) {
if (mListener != null) {
mListener.orientationChanged(newOrientation);
}
mOrientation = newOrientation;
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public interface OnOrientationChangeListener {
void orientationChanged(int newOrientation);
}
}
2.注册Listener
private SensorManager mSensorManager;
private OrientationListener mOrientationListener;
private void init(){
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mOrientationListener = new OrientationListener(newOrientation -> {
//设置屏幕方向
//setRequestedOrientation(newOrientation);
});
mSensorManager.registerListener(mOrientationListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
}
3.取消注册
记得在onDestroy()中取消注册的监听
@Override
protected void onDestroy() {
super.onDestroy();
mSensorManager.unregisterListener(mOrientationListener);
}