监测屏幕旋转的方案，这里简要说一下screenOrientation，OrientationEventListener，SensorEventListener。

方案一

screenOrientation。

在AndroidManifest中，activity配置screenOrientation，比如值为sensor，系统可以自动改变activity的界面方向。在回调onConfigurationChanged()中可以判断当前方向。

       <activity android:name=".ui.sensor.ScreenOrientationActivity"android:configChanges="orientation|keyboardHidden"android:screenOrientation="sensor"/>

优点：简单，系统自动。

缺点：只能监听屏幕方向；系统自动设置方向，当有条件切换时，无法实现需求；无法知道旋转方向。

方案二

OrientationEventListener。

实现OrientationEventListener方法。在适当的位置调用enable()和disable()来开启和关闭监听。

public class OrientationEventActivity extends AppCompatActivity {@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_sensor);initOrientationEvent();}OrientationEventListener mOrientationEventListener;public void initOrientationEvent(){mOrientationEventListener = new OrientationEventListener(this,SensorManager.SENSOR_DELAY_NORMAL) {@Overridepublic void onOrientationChanged(int orientation) {if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {return;  //手机平放时，检测不到有效的角度}//只检测是否有四个角度的改变if (orientation > 350 || orientation < 10) { //0度orientation = 0;} else if (orientation > 80 && orientation < 100) { //90度orientation = 90;} else if (orientation > 170 && orientation < 190) { //180度orientation = 180;} else if (orientation > 260 && orientation < 280) { //270度orientation = 270;} else {return;}}};if (mOrientationEventListener.canDetectOrientation()) {mOrientationEventListener.enable();} else {mOrientationEventListener.disable();}}@Overrideprotected void onDestroy() {super.onDestroy();if(mOrientationEventListener !=null){mOrientationEventListener.disable();}}
}

优点：可以判断角度，解决按需设置方向。也能通过判断知道旋转方向。但平放时，无法得到有效的角度。可以通过反射，解决平放时，无法获取角度问题。

    public  class ScreenOrientationListener extends OrientationEventListener {private int mOrientation;private OnOrientationChangedListener mOnOrientationChangedListener;private Context mContext;private Field mFieldRotation;private Object mOLegacy;public ScreenOrientationListener(Context context) {super(context);mContext = context;}public void setOnOrientationChangedListener(OnOrientationChangedListener listener) {this.mOnOrientationChangedListener = listener;}public int getOrientation() {int rotation = -1;try {if (null == mFieldRotation) {SensorManager sensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);Class clazzLegacy = Class.forName("android.hardware.LegacySensorManager");Constructor constructor = clazzLegacy.getConstructor(SensorManager.class);constructor.setAccessible(true);mOLegacy = constructor.newInstance(sensorManager);mFieldRotation = clazzLegacy.getDeclaredField("sRotation");mFieldRotation.setAccessible(true);}rotation = mFieldRotation.getInt(mOLegacy);} catch (Exception e) {LogUtil.e( "getRotation e=" + e.getMessage());e.printStackTrace();}
//        Log.d(TAG, "getRotation rotation=" + rotation);int orientation = -1;switch (rotation) {case Surface.ROTATION_0:orientation = 0;break;case Surface.ROTATION_90:orientation = 90;break;case Surface.ROTATION_180:orientation = 180;break;case Surface.ROTATION_270:orientation = 270;break;default:break;}
//        Log.d(TAG, "getRotation orientation=" + orientation);return orientation;}@Overridepublic void onOrientationChanged(int orientation) {if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {return; // 手机平放时，检测不到有效的角度}orientation = getOrientation();if (mOrientation != orientation) {mOrientation = orientation;if (null != mOnOrientationChangedListener) {mOnOrientationChangedListener.onOrientationChanged(mOrientation);LogUtil.d("ScreenOrientationListener onOrientationChanged orientation=" + mOrientation);}}}public interface OnOrientationChangedListener {void onOrientationChanged(int orientation);}}

方案三

SensorEventListener

package com.ader.demo_unit.ui.sensor;import android.annotation.TargetApi;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Build;
import android.os.Bundle;
import android.view.OrientationEventListener;
import android.view.Surface;import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;import com.ader.baseapp.base.ui.BaseActivity;
import com.ader.baseapp.base.utils.LogUtil;
import com.ader.demo_unit.R;import java.lang.reflect.Constructor;
import java.lang.reflect.Field;/*** Create by Wang Xiaowu on 2023-02-06* Describe:*/
public class SensorActivity extends AppCompatActivity {SensorManager sm;SensorEventListener mSensorEventListener = new SensorEventListener() {@Overridepublic void onSensorChanged(SensorEvent event) {
//            float[] values=event.values;
//            String sb="x方向加速度："+
//                    values[0]+
//                    "\nY轴方向加速度："+
//                    values[1]+
//                    "\nZ轴方向加速度："+
//                    values[2];
//            LogUtil.e(String.format("%s accuracy:%d sensor:%s",sb,event.accuracy,event.sensor.toString()));
//
//            /* 判断Sensor的种类 */if (event.sensor.getType() == Sensor.TYPE_ORIENTATION) {/* 取得X值资料 */float x_data = event.values[SensorManager.DATA_X];if ((x_data > 0 && x_data <= 22.5) || x_data > 337.5) {LogUtil.e("北方" + String.valueOf(x_data));} else if (x_data > 22.5 && x_data <= 67.5) {LogUtil.e("东北方" + String.valueOf(x_data));} else if (x_data > 67.5 && x_data <= 112.5) {LogUtil.e("东方" + String.valueOf(x_data));} else if (x_data > 112.5 && x_data <= 157.5) {LogUtil.e("东南方" + String.valueOf(x_data));} else if (x_data > 157.5 && x_data <= 202.5) {LogUtil.e("南方" + String.valueOf(x_data));} else if (x_data > 202.5 && x_data <= 247.5) {LogUtil.e("西南方" + String.valueOf(x_data));} else if (x_data > 247.5 && x_data <= 292.5) {LogUtil.e("西方" + String.valueOf(x_data));} else if (x_data > 292.5 && x_data <= 337.5) {LogUtil.e("西北方" + String.valueOf(x_data));}}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {LogUtil.e(String.format("onAccuracyChanged accuracy:%d sensor:%s",accuracy,sensor.toString()));}};@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_sensor);//1.获取系统的传感器管理服务sm =  (SensorManager)getSystemService(SENSOR_SERVICE);}@TargetApi(Build.VERSION_CODES.LOLLIPOP)@Overrideprotected void onResume() {super.onResume();//2.// 为系统的加速度传感器注册监听事件
//        sm.registerListener(mSensorEventListener,
//                sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
//                SensorManager.SENSOR_DELAY_GAME);
//        //方向传感器sm.registerListener(mSensorEventListener,sm.getDefaultSensor(Sensor.TYPE_ORIENTATION),SensorManager.SENSOR_DELAY_FASTEST);//* Sensor.TYPE_ORIENTATION：方向传感器。////* Sensor.TYPE_GYROSCOPE：陀螺仪传感器。////* Sensor.TYPE_MAGNETIC_FIELD：磁场传感器。////* Sensor.TYPE_GRAVITY：重力传感器。////* Sensor.TYPE_LINEAR_ACCELERATION：线性加速度传感器。////* Sensor.TYPE_AMBIENT_TEMPERATURE：温度传感器。////* Sensor.TYPE_LIGHT：光传感器。////* Sensor.TYPE_PRESSURE：压力传感器。}@Overrideprotected void onPause() {super.onPause();//取消注册sm.unregisterListener(mSensorEventListener);}}

可以获取位置方向，但获取屏幕方向有点困难。已经被废弃。官方推荐使用 SensorManager.getOrientation() 替代。