Android nearSphere需要一个贴图操作符

//Rahees是Parse.com for android中的一个类，我想从中获得geopoint g的最近位置列表。Rahees类的列名为“Locations”

我想通过与Rahees类的Location列中列出的地质点进行比较，从g中获得最近的地质点列表

//******************拉希斯班************************//

@ParseClassName("Rahees")
public class Rahees extends ParseObject {

   public  Rahees()
    {
        super();
    }


    public String getDisplayName() {
        return getString("displayName");
    }
    public void setDisplayName(String value) {

        put("displayName", value);
    }
    public static ParseQuery<Rahees> getQuery() {
        return ParseQuery.getQuery(Rahees.class);
    }

}

public class MainActivity extends AppCompatActivity {
    ParseGeoPoint g;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ParseUser cuser = ParseUser.getCurrentUser();

        Rahees haila = new Rahees();

        haila.setDisplayName("Rahim");

    }


   //button for Logging out of system
    public void logout(View view)
    {
        ParseUser.logOut();
        Intent intent = new Intent(MainActivity.this, SignUp_Login.class);
        startActivity(intent);


    }

//Button for going to Map Masti class, it is this button which triggers to compare the geopoint g with the geopoints in the server


    public void go_to_maps(View view)
    {

        Intent intent = new Intent(MainActivity.this, Map_Masti.class);
        startActivity(intent);
    }
}

public class Map_Masti extends FragmentActivity  {
    ParseGeoPoint g;
    private TextView textView;
    private SupportMapFragment mapFragment;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_masti);

        textView = (TextView)findViewById(R.id.text);
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map_fragment);

//Query to get the geopoint g from server 

        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.getInBackground("ccm3xKMmr4", new GetCallback<ParseUser>() {
            public void done(ParseUser object, ParseException e) {
                if (e == null) {
                    g = (ParseGeoPoint) object.get("user_Location");
                    Log.d("mohit", g + "");

                } else {
                    // something went wrong
                    Log.d("mohit", e + " ");
                }
            }
        });

//****************************MapMasti类*****************************//

@ParseClassName("Rahees")
public class Rahees extends ParseObject {

   public  Rahees()
    {
        super();
    }


    public String getDisplayName() {
        return getString("displayName");
    }
    public void setDisplayName(String value) {

        put("displayName", value);
    }
    public static ParseQuery<Rahees> getQuery() {
        return ParseQuery.getQuery(Rahees.class);
    }

}

public class MainActivity extends AppCompatActivity {
    ParseGeoPoint g;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ParseUser cuser = ParseUser.getCurrentUser();

        Rahees haila = new Rahees();

        haila.setDisplayName("Rahim");

    }


   //button for Logging out of system
    public void logout(View view)
    {
        ParseUser.logOut();
        Intent intent = new Intent(MainActivity.this, SignUp_Login.class);
        startActivity(intent);


    }

//Button for going to Map Masti class, it is this button which triggers to compare the geopoint g with the geopoints in the server


    public void go_to_maps(View view)
    {

        Intent intent = new Intent(MainActivity.this, Map_Masti.class);
        startActivity(intent);
    }
}

public class Map_Masti extends FragmentActivity  {
    ParseGeoPoint g;
    private TextView textView;
    private SupportMapFragment mapFragment;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_masti);

        textView = (TextView)findViewById(R.id.text);
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map_fragment);

//Query to get the geopoint g from server 

        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.getInBackground("ccm3xKMmr4", new GetCallback<ParseUser>() {
            public void done(ParseUser object, ParseException e) {
                if (e == null) {
                    g = (ParseGeoPoint) object.get("user_Location");
                    Log.d("mohit", g + "");

                } else {
                    // something went wrong
                    Log.d("mohit", e + " ");
                }
            }
        });

公共类映射\u Masti扩展了碎片活动{
地理点g；
私有文本视图文本视图；
私有支持mapFragment mapFragment；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.map_masti）；
textView=（textView）findViewById（R.id.text）；
mapFragment=（SupportMapFragment）getSupportFragmentManager（）；
//查询以从服务器获取地理点g
ParseQuery=ParseUser.getQuery（）；
getInBackground（“ccm3xKMmr4”，新的GetCallback（）{
public void done（ParseUser对象，parsee异常）{
如果（e==null）{
g=（ParseGeoPoint）object.get（“用户位置”）；
Log.d（“莫希特”，g+）；
}否则{
//出了点问题
Log.d（“莫希特”，e+）；
}
}
});

//用于比较对象“Rahees”和列“Locations”中哪些地理点靠近地理定位“g”的查询

ParseQuery mapQuery1=Rahees.getQuery（）；
地图1.流量计（“位置”，g，6000）；
mapQuery1.setLimit（3）；
mapQuery1.findInBackground（新的FindCallback（）{
@凌驾
公共void done（列出对象，parsee异常）{
//处理结果
如果（e==null）{//****这就是异常错误出现的地方，它不会进入if语句****
对于（int i=0；i

下面是我从其他部分得到的错误

01-10 12:27:38.655 4348-4348/？D/错误：com.parse.ParseRequest$ParseRequestException:$nearSphere需要一个映射操作符

我可以从解析中检索g的值，g的日志输出为： ParseGeoPoint[40.000000,30.000000]

---

请帮助

您应该在得到第一个查询的结果后才进行第二次查询，因为

g

为

null

直到将通过回调初始化

更新：

public class Map_Masti extends FragmentActivity {
    ParseGeoPoint g;
    private SupportMapFragment mapFragment;
    private TextView textView;

    private void getG() {
        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.getInBackground("ccm3xKMmr4", new GetCallback<ParseUser>() {
            public void done(ParseUser object, ParseException e) {
                if (e == null) {
                    g = (ParseGeoPoint) object.get("user_Location");
                    Log.d("mohit", g + "");
                    getLocations();

                } else {
                    // something went wrong
                    Log.d("mohit", e + " ");
                }
            }
        });
    }

    private void getLocations() {
        ParseQuery<Rahees> mapQuery1 = Rahees.getQuery();
        mapQuery1.whereWithinKilometers("Locations", g, 6000);
        mapQuery1.setLimit(3);
        mapQuery1.findInBackground(new FindCallback<Rahees>() {
            @Override
            public void done(List<Rahees> objects, ParseException e) {
                // Handle the results
                if (e == null) {//****this is where the exception error comes, it doesn't goes inside if statement****
                    for (int i = 0; i < objects.size(); i++) {
                        Log.d("mohit", "2" + objects.get(i).get("Locations"));

                    }
                } else {
                    Log.d("mohit", "" + e);
                }
            }
        });
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_masti);
        textView = (TextView) findViewById(R.id.text);
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map_fragment);
        getG();
    }
}

公共类映射\u Masti扩展了碎片活动{
地理点g；
私有支持mapFragment mapFragment；
私有文本视图文本视图；
私有void getG（）{
ParseQuery=ParseUser.getQuery（）；
getInBackground（“ccm3xKMmr4”，新的GetCallback（）{
public void done（ParseUser对象，parsee异常）{
如果（e==null）{
g=（ParseGeoPoint）object.get（“用户位置”）；
Log.d（“莫希特”，g+）；
getLocations（）；
}否则{
//出了点问题
Log.d（“莫希特”，e+）；
}
}
});
}
私有void getLocations（）{
ParseQuery mapQuery1=Rahees.getQuery（）；
地图1.流量计（“位置”，g，6000）；
mapQuery1.setLimit（3）；
mapQuery1.findInBackground（新的FindCallback（）{
@凌驾
公共void done（列出对象，parsee异常）{
//处理结果
如果（e==null）{//****这就是异常错误出现的地方，它不会进入if语句中****
对于（int i=0；i

您应该在得到第一个查询的结果之后才进行第二个查询，因为

g

是

null

直到将通过回调初始化

更新：

public class Map_Masti extends FragmentActivity {
    ParseGeoPoint g;
    private SupportMapFragment mapFragment;
    private TextView textView;

    private void getG() {
        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.getInBackground("ccm3xKMmr4", new GetCallback<ParseUser>() {
            public void done(ParseUser object, ParseException e) {
                if (e == null) {
                    g = (ParseGeoPoint) object.get("user_Location");
                    Log.d("mohit", g + "");
                    getLocations();

                } else {
                    // something went wrong
                    Log.d("mohit", e + " ");
                }
            }
        });
    }

    private void getLocations() {
        ParseQuery<Rahees> mapQuery1 = Rahees.getQuery();
        mapQuery1.whereWithinKilometers("Locations", g, 6000);
        mapQuery1.setLimit(3);
        mapQuery1.findInBackground(new FindCallback<Rahees>() {
            @Override
            public void done(List<Rahees> objects, ParseException e) {
                // Handle the results
                if (e == null) {//****this is where the exception error comes, it doesn't goes inside if statement****
                    for (int i = 0; i < objects.size(); i++) {
                        Log.d("mohit", "2" + objects.get(i).get("Locations"));

                    }
                } else {
                    Log.d("mohit", "" + e);
                }
            }
        });
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_masti);
        textView = (TextView) findViewById(R.id.text);
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map_fragment);
        getG();
    }
}

公共类映射\u Masti扩展了碎片活动{
地理点g；
私有支持mapFragment mapFragment；
私有文本视图文本视图；
私有void getG（）{
ParseQuery=ParseUser.getQuery（）；
getInBackground（“ccm3xKMmr4”，新的GetCallback（）{
public void done（ParseUser对象，parsee异常）{
如果（e==null）{
g=（ParseGeoPoint）object.get（“用户位置”）；
Log.d（“莫希特”，g+）；
getLocations（）；
}否则{
//出了点问题
Log.d（“莫希特”，e+）；
}
}
});
}
私有void getLocations（）{
ParseQuery mapQuery1=Rahees.getQuery（）；
地图1.流量计（“位置”，g，6000）；
mapQuery1.setLimit（3）；
mapQuery1.findInBackground（新的FindCallback（）{
@凌驾
公共void done（列出对象，parsee异常）{
//处理结果
如果（e==null）{//****这就是异常错误出现的地方，它不会进入if语句中****