Android编程基于重力传感器实现横竖屏放向切换功能

package com.d1ev.touch.App.helper;import android.app.Activity;import android.content.pm.ActivityInfo;import android.util.Log;import android.view.OrientationEventListener;import java.lang.ref.WeakReference;/** * Created by Administrator on 2016/12/3 0003. * 监听重力系统传感器的变化，为Vr视频播放器而定制 */public class MySensorHelper {  private static final String TAG = MySensorHelper.class.getSimpleName();  private OrientationEventListener mLandOrientationListener;  private OrientationEventListener mPortOrientationListener;  private WeakReference<Activity> mActivityWeakRef;  private boolean isPortLock = false;  private boolean isLandLock=false;  public MySensorHelper(final Activity activity) {    this.mActivityWeakRef = new WeakReference(activity);    this.mLandOrientationListener = new OrientationEventListener(activity, 3) {      public void onOrientationChanged(int orientation) {        Log.d(MySensorHelper.TAG, "mLandOrientationListener");        if(orientation < 100 && orientation > 80 || orientation < 280 && orientation > 260) {          Log.e(MySensorHelper.TAG, "转到了横屏");          if(!MySensorHelper.this.isLandLock) {            Activity mActivity = (Activity)MySensorHelper.this.mActivityWeakRef.get();            if(mActivity != null) {              Log.e(MySensorHelper.TAG, "转到了横屏##################");              mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);              isLandLock=true;              isPortLock=false;            }          }        }      }    };    this.mPortOrientationListener = new OrientationEventListener(activity, 3) {      public void onOrientationChanged(int orientation) {        Log.w(MySensorHelper.TAG, "mPortOrientationListener");        if(orientation < 10 || orientation > 350 || orientation < 190 && orientation > 170) {          Log.e(MySensorHelper.TAG, "转到了竖屏");          if(!MySensorHelper.this.isPortLock) {            Activity mActivity = (Activity)MySensorHelper.this.mActivityWeakRef.get();            if(mActivity != null) {              Log.e(MySensorHelper.TAG, "转到了竖屏!!!!!!!!!!!!!!!!!!!!!!");              mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);              isPortLock=true;              isLandLock=false;            }          }        }      }    };   //this.disable();  }  //禁用切换屏幕的开关  public void disable() {    Log.e(TAG, "disable");    this.mPortOrientationListener.disable();    this.mLandOrientationListener.disable();  }  //开启横竖屏切换的开关  public void enable(){    this.mPortOrientationListener.enable();    this.mLandOrientationListener.enable();  }  //设置竖屏是否上锁，true锁定屏幕,fanle解锁  public void setPortLock(boolean lockFlag) {    this.isPortLock = lockFlag;  }  //设置横屏是否锁定，true锁定，false解锁  public void setLandLock(boolean isLandLock){    this.isLandLock=isLandLock;  }}

helper.disable();