下面展示 百度地图后台定位。

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using ThreeSpaceJoin;
using System;
using MR_LBS.Client.Unity3D;
using LitJson;
using UnityEngine.SceneManagement;

//切换到地图界面，与Android相互传递消息，后台定位
public class BaiduMapAPI : MonoBehaviour
{
    public static BaiduMapAPI instance;

    [HideInInspector]
    //接收定位点的经纬度的信息
    public string myLongitude, myLatitude;

    //[HideInInspector]
    //是否由地图场景切换来
    //public int fromMap;

    //接收百度地图的指北针
    Vector3 heading;
    [HideInInspector]
    public long containerId;
    //当前Activity的对象
    //AndroidJavaObject currentActivity;
    
    void Awake()
    {
        instance = this;
    }

    void Start()
    {
        if (Application.platform != RuntimePlatform.Android)
            return;


        //获取context
        //AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        UnityActivity in this demo.
        //currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");


        openGPSDialog();

    }
    public void DelayToMap()
    {
        StartCoroutine(DelayToMapIEnumerator());
    }

    IEnumerator DelayToMapIEnumerator()
    {
        yield return new WaitForSeconds(2);
        StartLBSMapOnClick();
    }

    

    /// <summary>
    ///通过按钮切换到百度地图
    /// </summary>
    public void StartLBSMapOnClick()
    {
        StopAllCoroutines();
        UnityPhotonClient unityPhotonClient = UnityPhotonClient.Instance;

        //总功能界面，探险按钮
        if (unityPhotonClient.fightInfo == "" || unityPhotonClient.fightInfo == "null")
        {

            //StartCoroutine(SliderShow());
            //调用AndroidJavaObject.Call 参数1表示调用UnityActivity.JAVA类中的方法名称，参数2表示该方法传递过去的参数
            using (AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
            {
                using (AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"))
                {
                    //Debug.LogError(unityPhotonClient.loginData.ToJson().ToString());

                    //调用Android插件中UnityTestActivity中StartActivity0方法，stringToEdit表示它的参数
                    jo.Call("LoginMainActivity", unityPhotonClient.loginData.ToJson().ToString());
                }
            }
        }
        //战斗结束，确定按钮
        else {

            #region 友盟的数据统计
            //UMengMethod.CardIDSet(BattleController.instance.myMonsters);
            #endregion


            PlayerController playerCon = PlayerController.instance;
            //LoginController logCon = LoginController.instance;
            //EnemyController enemyCon = EnemyController.instance;
            BattleController battleCno = BattleController.instance;
            //MainView mView = MainView.instance;
            Player opp = playerCon.Opponent;
            //object[] data = new object[2];
            //当局获得积分
            //(int)battleCno.attackerScore - battleCno.defenseScore;
            //次元门desc
            //JsonClass.ResourceToJson();
            //次元门战斗力
            //battleCno.aggressivity;
            //次元门掠夺后的剩余资产
            //(int)battleCno.resourceCount - battleCno.battleCoin;
            JsonData battleResults = new JsonData();
            battleResults["result"] = battleCno.result.ToString();
            battleResults["battleCoin"] = (long)battleCno.spaceEnergy;
            battleResults["battleScore"] = (long)(battleCno.battleScores);
            if (battleCno.aggressivity == 0) {
                battleResults["noOne"] = 1;//占领
            }
            else
                battleResults["noOne"] = 0;
            //次元门有主人，并且战斗结束战斗力不为0
            if (opp != null && opp.UserId != UnityPhotonClient.Instance.wildOppUid)
                battleResults["battleResHostId"] = opp.UserId;
            else
                battleResults["battleResHostId"] = UnityPhotonClient.Instance.wildOppUid;
            if (battleCno.time_EnterGame.ToString().Length == 13 && battleCno.time_Gameover.ToString().Length == 13) {
                 battleResults["battleDuration"] = (int)Math.Ceiling((float)((battleCno.time_Gameover - battleCno.time_EnterGame) / 60000));
            }
            else
                battleResults["battleDuration"] = 0;
            unityPhotonClient.loginData["battleResult"] = battleResults;
            //StartCoroutine(SliderShow());

            #region

            //AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            //AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity");
            //调用Android插件中UnityTestActivity中StartActivity0方法，stringToEdit表示它的参数

            //exp milage
            //jo.Call("StartMainsActivity", toJson);//tostMsg为安卓方法名
            #endregion
            //调用AndroidJavaObject.Call 参数1表示调用UnityActivity.JAVA类中的方法名称，参数2表示该方法传递过去的参数
            //using (AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
            //{
            //    using (AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"))
            //    {
            //        //调用Android插件中UnityTestActivity中StartActivity0方法，stringToEdit表示它的参数
            //        jo.Call("WarEnd", unityPhotonClient.loginData.ToJson().ToString(), containerId);
            //    }

            //}

            SceneManager.LoadScene("EnterAndroid");
        }
      
    }

    //进入地图前进度条
    IEnumerator SliderShow()
    {
        GameObject go;
        go = MainView.instance.toMapSlider;
        go.transform.parent.gameObject.SetActive(true);
        Slider slider = go.GetComponent<Slider>();
        slider.value = 0.9f;
        yield return 0;
        //while (slider.value < 1)
        //{
        //    yield return new WaitForFixedUpdate();
        //    slider.value += 0.01f;
        //}
    }

    // 当前我的位置   myLocation是一个经纬度，用空格分开，1秒钟调用一次
    // onReceiveLocation: {"latitude":32.086939,"longitude":118.919104}
    public void currentLocationToUnity(string json)
    {
        JsonData jsonLoc = JsonMapper.ToObject(json);
        myLatitude = jsonLoc["latitude"].ToString();
        myLongitude = jsonLoc["longitude"].ToString();
    }

    /// <summary>
    /// Send Currents orientation to unity.
    /// onSensorChanged: {"z":-1.916988730430603,"x":9.419827256351709E-4,"y":0.004167246166616678}
    /// </summary>
    /// <param name="json">Json.</param>
    public void currentOrientationToUnity(string json)
    {
        JsonData jsonOri = JsonMapper.ToObject(json);

        heading = new Vector3(float.Parse(jsonOri["x"].ToString()), float.Parse(jsonOri["y"].ToString()), float.Parse(jsonOri["z"].ToString()));

    }

    //从地图获取对战的容器
    //public void GetContainer(long containerId, long opponentId)
    public void GetContainer(string content)
    {
        JsonData deJson = JsonMapper.ToObject(content);
        PlayerController playerCon = PlayerController.instance;
        //Debug.LogError("Test");
        containerId = long.Parse(ExceptionSolve.StringExc(deJson["containerId"].ToJson()));
        long opponentId = long.Parse(ExceptionSolve.StringExc(deJson["opponentId"].ToJson()));

        //Debug.LogError("containerId:" + containerId);
        //Debug.LogError("opponentId: " + opponentId);
        BattleController.instance.containerId = containerId;
        //0 位置，1 上锁，2 解锁
        Operations.ResourceUpdateStatus(playerCon.PlayerMe.UserId, containerId, 1);
        Operations.GetResource(opponentId, containerId);
        //Debug.LogError("Test 2");
    }

    /// <summary>
    /// 弹出GPS提示框
    /// </summary>
    public void openGPSDialog()
    {
        using (AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
        {
            using (AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"))
            {
                //调用Android插件中UnityTestActivity中StartActivity0方法，stringToEdit表示它的参数
                jo.Call("openGPS");
            }

        }
        //currentActivity.Call("openGPS");
    }

    /// <summary>
    /// Position Conversion.
    /// </summary>
    public Vector3 PositionConversion(double targetLat, double targetLon)
    {
        //B代表纬度，L代表经度，H代表高程
        Vector3 myPosBLH = new Vector3(float.Parse(myLatitude), float.Parse(myLongitude), 0);

        Vector3 targetPosBLH = new Vector3((float)targetLat, (float)targetLon, myPosBLH.z);

        WGS84Model wgs84ModelMe = new WGS84Model(myPosBLH.x, myPosBLH.y, myPosBLH.z);

        //WGS84Model wgs84ModelTarget = new WGS84Model (targetPosBLH.x, targetPosBLH.y, targetPosBLH.z);

        WGS84Model wgs84ModelX = new WGS84Model(myPosBLH.x, targetPosBLH.y, myPosBLH.z);
        WGS84Model wgs84ModelZ = new WGS84Model(targetPosBLH.x, myPosBLH.y, myPosBLH.z);

        double distanceX = Math.Sqrt(Math.Pow(wgs84ModelMe.X - wgs84ModelX.X, 2) + Math.Pow(wgs84ModelMe.Y - wgs84ModelX.Y, 2) + Math.Pow(wgs84ModelMe.Z - wgs84ModelX.Z, 2));
        double distanceY = FloatToDouble.ToFixedDecimal(targetPosBLH.z) - FloatToDouble.ToFixedDecimal(myPosBLH.z);
        double distanceZ = Math.Sqrt(Math.Pow(wgs84ModelMe.X - wgs84ModelZ.X, 2) + Math.Pow(wgs84ModelMe.Y - wgs84ModelZ.Y, 2) + Math.Pow(wgs84ModelMe.Z - wgs84ModelZ.Z, 2));


        //		double radian = FloatToDouble.ToFixedDecimal(Input.compass.trueHeading) * Math.PI / 180;
        float trueHeading;
        if (heading.z <= 0 && heading.z >= -Mathf.PI)
        {
            trueHeading = heading.z + 2 * Mathf.PI;
        }
        else
        {
            trueHeading = heading.z;
        }
        double radian = FloatToDouble.ToFixedDecimal(trueHeading);


        MobileToWorldModel mobileToWorldModel;
        if (targetPosBLH.y >= myPosBLH.y && targetPosBLH.x >= myPosBLH.x)
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(distanceX, distanceY, distanceZ, radian);
        }
        else if (targetPosBLH.y >= myPosBLH.y && targetPosBLH.x < myPosBLH.x)
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(distanceX, distanceY, -distanceZ, radian);
        }
        else if (targetPosBLH.y < myPosBLH.y && targetPosBLH.x >= myPosBLH.x)
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(-distanceX, distanceY, distanceZ, radian);
        }
        else
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(-distanceX, distanceY, -distanceZ, radian);
        }
        //double distance = mobileToWorldModel.Radius;

        //		return new Vector3((float)mobileToWorldModel.X, (float)mobileToWorldModel.Y, -(float)mobileToWorldModel.Z);
        return new Vector3((float)mobileToWorldModel.X, (float)mobileToWorldModel.Y, (float)mobileToWorldModel.Z);
    }

    public Vector3 PositionConversion(double targetLat, double targetLon, out double distance)
    {
        //B代表纬度，L代表经度，H代表高程
        Vector3 myPosBLH = new Vector3(float.Parse(myLatitude), float.Parse(myLongitude), 0);

        Vector3 targetPosBLH = new Vector3((float)targetLat, (float)targetLon, myPosBLH.z);

        WGS84Model wgs84ModelMe = new WGS84Model(myPosBLH.x, myPosBLH.y, myPosBLH.z);

        //WGS84Model wgs84ModelTarget = new WGS84Model (targetPosBLH.x, targetPosBLH.y, targetPosBLH.z);

        WGS84Model wgs84ModelX = new WGS84Model(myPosBLH.x, targetPosBLH.y, myPosBLH.z);
        WGS84Model wgs84ModelZ = new WGS84Model(targetPosBLH.x, myPosBLH.y, myPosBLH.z);

        double distanceX = Math.Sqrt(Math.Pow(wgs84ModelMe.X - wgs84ModelX.X, 2) + Math.Pow(wgs84ModelMe.Y - wgs84ModelX.Y, 2) + Math.Pow(wgs84ModelMe.Z - wgs84ModelX.Z, 2));
        double distanceY = FloatToDouble.ToFixedDecimal(targetPosBLH.z) - FloatToDouble.ToFixedDecimal(myPosBLH.z);
        double distanceZ = Math.Sqrt(Math.Pow(wgs84ModelMe.X - wgs84ModelZ.X, 2) + Math.Pow(wgs84ModelMe.Y - wgs84ModelZ.Y, 2) + Math.Pow(wgs84ModelMe.Z - wgs84ModelZ.Z, 2));


        //      double radian = FloatToDouble.ToFixedDecimal(Input.compass.trueHeading) * Math.PI / 180;
        float trueHeading;
        if (heading.z <= 0 && heading.z >= -Mathf.PI)
        {
            trueHeading = heading.z + 2 * Mathf.PI;
        }
        else
        {
            trueHeading = heading.z;
        }
        double radian = FloatToDouble.ToFixedDecimal(trueHeading);


        MobileToWorldModel mobileToWorldModel;
        if (targetPosBLH.y >= myPosBLH.y && targetPosBLH.x >= myPosBLH.x)
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(distanceX, distanceY, distanceZ, radian);
        }
        else if (targetPosBLH.y >= myPosBLH.y && targetPosBLH.x < myPosBLH.x)
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(distanceX, distanceY, -distanceZ, radian);
        }
        else if (targetPosBLH.y < myPosBLH.y && targetPosBLH.x >= myPosBLH.x)
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(-distanceX, distanceY, distanceZ, radian);
        }
        else
        {
            //Debug.Log (Input.gyro.attitude.eulerAngles.z);
            mobileToWorldModel = new MobileToWorldModel(-distanceX, distanceY, -distanceZ, radian);
        }
        distance = mobileToWorldModel.Radius;

        //      return new Vector3((float)mobileToWorldModel.X, (float)mobileToWorldModel.Y, -(float)mobileToWorldModel.Z);
        return new Vector3((float)mobileToWorldModel.X, (float)mobileToWorldModel.Y, (float)mobileToWorldModel.Z);
    }
}