Ufyukyu

Question

  package com.jaygandhi.map3;



 import android.Manifest;

 import android.content.pm.PackageManager;

 import android.location.Location;

 import android.os.Build;

 import android.support.v4.app.ActivityCompat;

 import android.support.v4.app.FragmentActivity;

 import android.os.Bundle;

 import android.support.v4.content.ContextCompat;

 import android.support.v7.app.AppCompatActivity;

 import android.widget.Toast;



 import com.google.android.gms.common.ConnectionResult;

 import com.google.android.gms.common.api.GoogleApiClient;

 import com.google.android.gms.location.LocationListener;

 import com.google.android.gms.location.LocationRequest;

 import com.google.android.gms.location.LocationServices;

 import com.google.android.gms.maps.CameraUpdateFactory;

 import com.google.android.gms.maps.GoogleMap;

 import com.google.android.gms.maps.OnMapReadyCallback;

 import com.google.android.gms.maps.SupportMapFragment;

 import com.google.android.gms.maps.model.BitmapDescriptorFactory;

 import com.google.android.gms.maps.model.LatLng;

 import com.google.android.gms.maps.model.Marker;

 import com.google.android.gms.maps.model.MarkerOptions;







public class MapsActivity extends AppCompatActivity

        implements OnMapReadyCallback,

        GoogleApiClient.ConnectionCallbacks,

        GoogleApiClient.OnConnectionFailedListener,

        LocationListener

{



    GoogleMap mGoogleMap;

    SupportMapFragment mapFrag;

    LocationRequest mLocationRequest;

    GoogleApiClient mGoogleApiClient;

    Location mLastLocation;

    Marker mCurrLocationMarker;



    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_maps);



        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            checkLocationPermission();

        }



        mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

        mapFrag.getMapAsync(this);

    }



    @Override

    public void onPause() {

        super.onPause();



        //stop location updates when Activity is no longer active

        if (mGoogleApiClient != null) {

            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

        }

    }



    @Override

    public void onMapReady(GoogleMap googleMap)

    {

        mGoogleMap=googleMap;

        mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);



        //Initialize Google Play Services

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            if (ContextCompat.checkSelfPermission(this,

                    Manifest.permission.ACCESS_FINE_LOCATION)

                    == PackageManager.PERMISSION_GRANTED) {

                buildGoogleApiClient();

                mGoogleMap.setMyLocationEnabled(true);

            }

        }

        else {

            buildGoogleApiClient();

            mGoogleMap.setMyLocationEnabled(true);

        }

    }



    protected synchronized void buildGoogleApiClient() {

        mGoogleApiClient = new GoogleApiClient.Builder(this)

                .addConnectionCallbacks(this)

                .addOnConnectionFailedListener(this)

                .addApi(LocationServices.API)

                .build();

        mGoogleApiClient.connect();

    }



    @Override

    public void onConnected(Bundle bundle)

    {

        mLocationRequest = new LocationRequest();

        mLocationRequest.setInterval(1000);

        mLocationRequest.setFastestInterval(1000);

        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                == PackageManager.PERMISSION_GRANTED)

        {



            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);



        }

    }



    @Override

    public void onConnectionSuspended(int i) {}



    @Override

    public void onConnectionFailed(ConnectionResult connectionResult) {}



    @Override

    public void onLocationChanged(Location location)

    {

        mLastLocation = location;

        if (mCurrLocationMarker != null)

        {

            mCurrLocationMarker.remove();

        }



        //Place current location marker

        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

        MarkerOptions markerOptions = new MarkerOptions();

        markerOptions.position(latLng);

        markerOptions.title("Current Position");

        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));

        mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);



        //move map camera

        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));



        if (mGoogleApiClient != null)

        {

            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

        }

    }



    public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

    public boolean checkLocationPermission(){

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                != PackageManager.PERMISSION_GRANTED) {



            // Should we show an explanation?

            if (ActivityCompat.shouldShowRequestPermissionRationale(this,

                    Manifest.permission.ACCESS_FINE_LOCATION)) {



                // Show an expanation to the user *asynchronously* -- don't block

                // this thread waiting for the user's response! After the user

                // sees the explanation, try again to request the permission.



                //Prompt the user once explanation has been shown

                ActivityCompat.requestPermissions(this,

                        new String{Manifest.permission.ACCESS_FINE_LOCATION},

                        MY_PERMISSIONS_REQUEST_LOCATION);





            } else {

                // No explanation needed, we can request the permission.

                ActivityCompat.requestPermissions(this,

                        new String{Manifest.permission.ACCESS_FINE_LOCATION},

                        MY_PERMISSIONS_REQUEST_LOCATION);

            }

            return false;

        } else {

            return true;

        }

    }



    @Override

    public void onRequestPermissionsResult(int requestCode,

                                           String permissions, int grantResults) {

        switch (requestCode) {

            case MY_PERMISSIONS_REQUEST_LOCATION: {

                // If request is cancelled, the result arrays are empty.

                if (grantResults.length > 0

                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {



                    // permission was granted, yay! Do the

                    // contacts-related task you need to do.

                    if (ContextCompat.checkSelfPermission(this,

                            Manifest.permission.ACCESS_FINE_LOCATION)

                            == PackageManager.PERMISSION_GRANTED) {



                        if (mGoogleApiClient == null) {

                            buildGoogleApiClient();

                        }

                        mGoogleMap.setMyLocationEnabled(true);

                    }



                } else {



                    // permission denied, boo! Disable the

                    // functionality that depends on this permission.

                    Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();

                }

                return;

            }



            // other 'case' lines to check for other

            // permissions this app might request

        }

    }



}

This code I get from different answer but it did not update in real time.

I tried this code but when maps loads first time marker show current location but when my location is changed marker do not move to new location.

score 4 · Accepted Answer · 2016-04-16 18:47:08Z

You just need to remove the call to removeLocationUpdates() in onLocationChanged():

@Override

public void onLocationChanged(Location location)

{

    mLastLocation = location;

    if (mCurrLocationMarker != null)

    {

        mCurrLocationMarker.remove();

    }



    //Place current location marker

    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

    MarkerOptions markerOptions = new MarkerOptions();

    markerOptions.position(latLng);

    markerOptions.title("Current Position");

    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));

    mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);



    //move map camera

    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

    mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));



    //Remove this code:

    //if (mGoogleApiClient != null)

    //{

      //LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

    //}

}

Also add an onResume() Override and re-register for location updates if the Google API Client is not null:

@Override

public void onResume() {

    super.onResume();

    if (mGoogleApiClient != null &&

            ContextCompat.checkSelfPermission(this,

            Manifest.permission.ACCESS_FINE_LOCATION)

            == PackageManager.PERMISSION_GRANTED) {

        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

    }

}

The original code was designed to only get one location, and then remove location updates after the first location comes in.

Bear in mind that keeping a location listener active for long periods will cause more battery drain.

Also note that for testing purposes, you can set more aggressive values in the location request:

@Override

public void onConnected(Bundle bundle)

{

    mLocationRequest = new LocationRequest();

    mLocationRequest.setInterval(1000);

    mLocationRequest.setFastestInterval(1000);

    mLocationRequest.setSmallestDisplacement(0.1F); //added

    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); //changed

    if (ContextCompat.checkSelfPermission(this,

            Manifest.permission.ACCESS_FINE_LOCATION)

            == PackageManager.PERMISSION_GRANTED)

    {



        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);



    }

}

Making the above changes, this code works for me:

public class MapLocationActivity extends AppCompatActivity

        implements OnMapReadyCallback,

        GoogleApiClient.ConnectionCallbacks,

        GoogleApiClient.OnConnectionFailedListener,

        LocationListener {



    GoogleMap mGoogleMap;

    SupportMapFragment mapFrag;

    LocationRequest mLocationRequest;

    GoogleApiClient mGoogleApiClient;

    Location mLastLocation;

    Marker mCurrLocationMarker;



    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            checkLocationPermission();

        }



        mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

        mapFrag.getMapAsync(this);

    }



    @Override

    public void onPause() {

        super.onPause();



        //stop location updates when Activity is no longer active

        if (mGoogleApiClient != null) {

            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

        }

    }



    @Override

    public void onResume() {

        super.onResume();

        if (mGoogleApiClient != null &&

                ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                == PackageManager.PERMISSION_GRANTED) {

            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

        }

    }



    @Override

    public void onMapReady(GoogleMap googleMap)

    {

        mGoogleMap=googleMap;

        mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);



        //Initialize Google Play Services

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            if (ContextCompat.checkSelfPermission(this,

                    Manifest.permission.ACCESS_FINE_LOCATION)

                    == PackageManager.PERMISSION_GRANTED) {

                buildGoogleApiClient();

                mGoogleMap.setMyLocationEnabled(true);

            }

        }

        else {

            buildGoogleApiClient();

            mGoogleMap.setMyLocationEnabled(true);

        }

    }



    protected synchronized void buildGoogleApiClient() {

        mGoogleApiClient = new GoogleApiClient.Builder(this)

                .addConnectionCallbacks(this)

                .addOnConnectionFailedListener(this)

                .addApi(LocationServices.API)

                .build();

        mGoogleApiClient.connect();

    }



    @Override

    public void onConnected(Bundle bundle) {

        mLocationRequest = new LocationRequest();

        mLocationRequest.setInterval(1000);

        mLocationRequest.setFastestInterval(1000);

        mLocationRequest.setSmallestDisplacement(0.1f);

        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                == PackageManager.PERMISSION_GRANTED) {

            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

        }

    }



    @Override

    public void onConnectionSuspended(int i) {}



    @Override

    public void onConnectionFailed(ConnectionResult connectionResult) {}



    @Override

    public void onLocationChanged(Location location)

    {

        Toast.makeText(this, "Location Changed " + location.getLatitude()

                + location.getLongitude(), Toast.LENGTH_LONG).show();



        mLastLocation = location;

        if (mCurrLocationMarker != null) {

            mCurrLocationMarker.remove();

        }



        //Place current location marker

        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

        MarkerOptions markerOptions = new MarkerOptions();

        markerOptions.position(latLng);

        markerOptions.title("Current Position");

        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));

        mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);



        //move map camera

        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));





    }



    public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

    public boolean checkLocationPermission(){

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                != PackageManager.PERMISSION_GRANTED) {



            // Should we show an explanation?

            if (ActivityCompat.shouldShowRequestPermissionRationale(this,

                    Manifest.permission.ACCESS_FINE_LOCATION)) {



                // Show an expanation to the user *asynchronously* -- don't block

                // this thread waiting for the user's response! After the user

                // sees the explanation, try again to request the permission.



                //Prompt the user once explanation has been shown

                ActivityCompat.requestPermissions(this,

                        new String{Manifest.permission.ACCESS_FINE_LOCATION},

                        MY_PERMISSIONS_REQUEST_LOCATION);





            } else {

                // No explanation needed, we can request the permission.

                ActivityCompat.requestPermissions(this,

                        new String{Manifest.permission.ACCESS_FINE_LOCATION},

                        MY_PERMISSIONS_REQUEST_LOCATION);

            }

            return false;

        } else {

            return true;

        }

    }



    @Override

    public void onRequestPermissionsResult(int requestCode,

                                           String permissions, int grantResults) {

        switch (requestCode) {

            case MY_PERMISSIONS_REQUEST_LOCATION: {

                // If request is cancelled, the result arrays are empty.

                if (grantResults.length > 0

                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {



                    // permission was granted, yay! Do the

                    // contacts-related task you need to do.

                    if (ContextCompat.checkSelfPermission(this,

                            Manifest.permission.ACCESS_FINE_LOCATION)

                            == PackageManager.PERMISSION_GRANTED) {



                        if (mGoogleApiClient == null) {

                            buildGoogleApiClient();

                        }

                        mGoogleMap.setMyLocationEnabled(true);

                    }



                } else {



                    // permission denied, boo! Disable the

                    // functionality that depends on this permission.

                    Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();

                }

                return;

            }



            // other 'case' lines to check for other

            // permissions this app might request

        }

    }



}

sir, i removed this lines you told me and i went outside and check it again... but still marker is not moving to new location — Apr 16 '16 at 16:40
google's default current location marker(blue dot) is moving to new location , but costume marker markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE)); is not moving to new location — Apr 16 '16 at 16:55
@HammadNasir This example only uses one Marker to show your current location. Of course, you can add as many Markers as you like in addition to the current location Marker. — Feb 23 '17 at 19:18
@HammadNasir Well, you'll need to develop server functionality such that each user can tell the server their location, and also query the server to get the location of other users in their group. Then, for each location the server gives you for other users, place a Marker on the map. — Feb 23 '17 at 19:32

score 1 · Accepted Answer · 2017-08-17 23:11:13Z

Here is a Simple method of updating marker as soon as the location changes!
As we know the onLocationChanged() methode is called when ever there is a change in location. And here we basically set the marker to the current position.
Follow the process given bellow. That works for me and I hope it will do for you as well :)

@RequiresApi(api = Build.VERSION_CODES.N)//This line requires if you are using 25/26 API

@Override

public void onLocationChanged(Location location) {

    //Removing previously added markers here!

    mMap.clear();

    Log.d(TAG, "Firing onLocationChanged..............................................");

    mCurrentLocation = location;

    mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());



    updateUI();

}

We can simply clear previously added markers using the mMap.clear() where mMap is the GoogleMap object and is also called and assigned in onMapReady() methode. Then we can get current location and set marker in an external method which is here: updateUI();

private void updateUI() {

    Log.d(TAG, "UI update initiated .............");

    if (null != mCurrentLocation) {



        LatLng allLatLang = new LatLng(mCurrentLocation.getLatitude(),mCurrentLocation.getLongitude());



        MarkerOptions markerOptions = new MarkerOptions();

        markerOptions.position(allLatLang);

        markerOptions.title("USER NAME");

        markerOptions.snippet("Users Basic Information");

        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));

        locationMarker = mMap.addMarker(markerOptions);



        //You can add this lines if you want to show the realtime data change on any TextView

        String lat = String.valueOf(mCurrentLocation.getLatitude());

        String lng = String.valueOf(mCurrentLocation.getLongitude());

        locationUpdate.setText("At Time: " + mLastUpdateTime + "n" +

                "Latitude: " + lat + "n" +

                "Longitude: " + lng + "n" +

                "Accuracy: " + mCurrentLocation.getAccuracy() + "n" +

                "Provider: " + mCurrentLocation.getProvider());

    } else {

        Log.d(TAG, "location is null ...............");

    }

}

So, when ever the location is changing, the onLocationChanged() method is called and then we are removing the existing markers and setting it again to the new position.
Hope this will work out. Let me know if it helps.
Thank you.!

kalpeshdeokalpeshdeo 6211514 · Accepted Answer · 2017-03-01 09:16:26Z

0

Implement OnCameraMoveListener and set new position for existing marker in onCameraMove

@Override

public void onCameraMove() {



    mMarker.setPosition(mMap.getCameraPosition().target);



}

answered Mar 1 '17 at 9:16

kalpeshdeo

6211514

add a comment |

Jahangir KabirJahangir Kabir 728512 · Accepted Answer · 2017-11-12 01:48:22Z

Inside your onLocationChanged try like this

        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLocationLatLng, 18));

        if(myMarker == null) {

            myMarker = mMap.addMarker(new MarkerOptions().position(currentLocationLatLng)

                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));

        } else {

            myMarker.setPosition(currentLocationLatLng);

        }

This is the better way to move existing marker then clear and create it again.

score 4 · Accepted Answer · 2016-04-16 18:47:08Z

You just need to remove the call to removeLocationUpdates() in onLocationChanged():

@Override

public void onLocationChanged(Location location)

{

    mLastLocation = location;

    if (mCurrLocationMarker != null)

    {

        mCurrLocationMarker.remove();

    }



    //Place current location marker

    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

    MarkerOptions markerOptions = new MarkerOptions();

    markerOptions.position(latLng);

    markerOptions.title("Current Position");

    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));

    mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);



    //move map camera

    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

    mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));



    //Remove this code:

    //if (mGoogleApiClient != null)

    //{

      //LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

    //}

}

Also add an onResume() Override and re-register for location updates if the Google API Client is not null:

@Override

public void onResume() {

    super.onResume();

    if (mGoogleApiClient != null &&

            ContextCompat.checkSelfPermission(this,

            Manifest.permission.ACCESS_FINE_LOCATION)

            == PackageManager.PERMISSION_GRANTED) {

        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

    }

}

The original code was designed to only get one location, and then remove location updates after the first location comes in.

Bear in mind that keeping a location listener active for long periods will cause more battery drain.

Also note that for testing purposes, you can set more aggressive values in the location request:

@Override

public void onConnected(Bundle bundle)

{

    mLocationRequest = new LocationRequest();

    mLocationRequest.setInterval(1000);

    mLocationRequest.setFastestInterval(1000);

    mLocationRequest.setSmallestDisplacement(0.1F); //added

    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); //changed

    if (ContextCompat.checkSelfPermission(this,

            Manifest.permission.ACCESS_FINE_LOCATION)

            == PackageManager.PERMISSION_GRANTED)

    {



        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);



    }

}

Making the above changes, this code works for me:

public class MapLocationActivity extends AppCompatActivity

        implements OnMapReadyCallback,

        GoogleApiClient.ConnectionCallbacks,

        GoogleApiClient.OnConnectionFailedListener,

        LocationListener {



    GoogleMap mGoogleMap;

    SupportMapFragment mapFrag;

    LocationRequest mLocationRequest;

    GoogleApiClient mGoogleApiClient;

    Location mLastLocation;

    Marker mCurrLocationMarker;



    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            checkLocationPermission();

        }



        mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

        mapFrag.getMapAsync(this);

    }



    @Override

    public void onPause() {

        super.onPause();



        //stop location updates when Activity is no longer active

        if (mGoogleApiClient != null) {

            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

        }

    }



    @Override

    public void onResume() {

        super.onResume();

        if (mGoogleApiClient != null &&

                ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                == PackageManager.PERMISSION_GRANTED) {

            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

        }

    }



    @Override

    public void onMapReady(GoogleMap googleMap)

    {

        mGoogleMap=googleMap;

        mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);



        //Initialize Google Play Services

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            if (ContextCompat.checkSelfPermission(this,

                    Manifest.permission.ACCESS_FINE_LOCATION)

                    == PackageManager.PERMISSION_GRANTED) {

                buildGoogleApiClient();

                mGoogleMap.setMyLocationEnabled(true);

            }

        }

        else {

            buildGoogleApiClient();

            mGoogleMap.setMyLocationEnabled(true);

        }

    }



    protected synchronized void buildGoogleApiClient() {

        mGoogleApiClient = new GoogleApiClient.Builder(this)

                .addConnectionCallbacks(this)

                .addOnConnectionFailedListener(this)

                .addApi(LocationServices.API)

                .build();

        mGoogleApiClient.connect();

    }



    @Override

    public void onConnected(Bundle bundle) {

        mLocationRequest = new LocationRequest();

        mLocationRequest.setInterval(1000);

        mLocationRequest.setFastestInterval(1000);

        mLocationRequest.setSmallestDisplacement(0.1f);

        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                == PackageManager.PERMISSION_GRANTED) {

            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);

        }

    }



    @Override

    public void onConnectionSuspended(int i) {}



    @Override

    public void onConnectionFailed(ConnectionResult connectionResult) {}



    @Override

    public void onLocationChanged(Location location)

    {

        Toast.makeText(this, "Location Changed " + location.getLatitude()

                + location.getLongitude(), Toast.LENGTH_LONG).show();



        mLastLocation = location;

        if (mCurrLocationMarker != null) {

            mCurrLocationMarker.remove();

        }



        //Place current location marker

        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

        MarkerOptions markerOptions = new MarkerOptions();

        markerOptions.position(latLng);

        markerOptions.title("Current Position");

        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));

        mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);



        //move map camera

        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));





    }



    public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

    public boolean checkLocationPermission(){

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.ACCESS_FINE_LOCATION)

                != PackageManager.PERMISSION_GRANTED) {



            // Should we show an explanation?

            if (ActivityCompat.shouldShowRequestPermissionRationale(this,

                    Manifest.permission.ACCESS_FINE_LOCATION)) {



                // Show an expanation to the user *asynchronously* -- don't block

                // this thread waiting for the user's response! After the user

                // sees the explanation, try again to request the permission.



                //Prompt the user once explanation has been shown

                ActivityCompat.requestPermissions(this,

                        new String{Manifest.permission.ACCESS_FINE_LOCATION},

                        MY_PERMISSIONS_REQUEST_LOCATION);





            } else {

                // No explanation needed, we can request the permission.

                ActivityCompat.requestPermissions(this,

                        new String{Manifest.permission.ACCESS_FINE_LOCATION},

                        MY_PERMISSIONS_REQUEST_LOCATION);

            }

            return false;

        } else {

            return true;

        }

    }



    @Override

    public void onRequestPermissionsResult(int requestCode,

                                           String permissions, int grantResults) {

        switch (requestCode) {

            case MY_PERMISSIONS_REQUEST_LOCATION: {

                // If request is cancelled, the result arrays are empty.

                if (grantResults.length > 0

                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {



                    // permission was granted, yay! Do the

                    // contacts-related task you need to do.

                    if (ContextCompat.checkSelfPermission(this,

                            Manifest.permission.ACCESS_FINE_LOCATION)

                            == PackageManager.PERMISSION_GRANTED) {



                        if (mGoogleApiClient == null) {

                            buildGoogleApiClient();

                        }

                        mGoogleMap.setMyLocationEnabled(true);

                    }



                } else {



                    // permission denied, boo! Disable the

                    // functionality that depends on this permission.

                    Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();

                }

                return;

            }



            // other 'case' lines to check for other

            // permissions this app might request

        }

    }



}

sir, i removed this lines you told me and i went outside and check it again... but still marker is not moving to new location — Apr 16 '16 at 16:40
google's default current location marker(blue dot) is moving to new location , but costume marker markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE)); is not moving to new location — Apr 16 '16 at 16:55
@HammadNasir This example only uses one Marker to show your current location. Of course, you can add as many Markers as you like in addition to the current location Marker. — Feb 23 '17 at 19:18
@HammadNasir Well, you'll need to develop server functionality such that each user can tell the server their location, and also query the server to get the location of other users in their group. Then, for each location the server gives you for other users, place a Marker on the map. — Feb 23 '17 at 19:32

score 1 · Accepted Answer · 2017-08-17 23:11:13Z

Here is a Simple method of updating marker as soon as the location changes!
As we know the onLocationChanged() methode is called when ever there is a change in location. And here we basically set the marker to the current position.
Follow the process given bellow. That works for me and I hope it will do for you as well :)

@RequiresApi(api = Build.VERSION_CODES.N)//This line requires if you are using 25/26 API

@Override

public void onLocationChanged(Location location) {

    //Removing previously added markers here!

    mMap.clear();

    Log.d(TAG, "Firing onLocationChanged..............................................");

    mCurrentLocation = location;

    mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());



    updateUI();

}

We can simply clear previously added markers using the mMap.clear() where mMap is the GoogleMap object and is also called and assigned in onMapReady() methode. Then we can get current location and set marker in an external method which is here: updateUI();

private void updateUI() {

    Log.d(TAG, "UI update initiated .............");

    if (null != mCurrentLocation) {



        LatLng allLatLang = new LatLng(mCurrentLocation.getLatitude(),mCurrentLocation.getLongitude());



        MarkerOptions markerOptions = new MarkerOptions();

        markerOptions.position(allLatLang);

        markerOptions.title("USER NAME");

        markerOptions.snippet("Users Basic Information");

        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE));

        locationMarker = mMap.addMarker(markerOptions);



        //You can add this lines if you want to show the realtime data change on any TextView

        String lat = String.valueOf(mCurrentLocation.getLatitude());

        String lng = String.valueOf(mCurrentLocation.getLongitude());

        locationUpdate.setText("At Time: " + mLastUpdateTime + "n" +

                "Latitude: " + lat + "n" +

                "Longitude: " + lng + "n" +

                "Accuracy: " + mCurrentLocation.getAccuracy() + "n" +

                "Provider: " + mCurrentLocation.getProvider());

    } else {

        Log.d(TAG, "location is null ...............");

    }

}

So, when ever the location is changing, the onLocationChanged() method is called and then we are removing the existing markers and setting it again to the new position.
Hope this will work out. Let me know if it helps.
Thank you.!

kalpeshdeokalpeshdeo 6211514 · Accepted Answer · 2017-03-01 09:16:26Z

0

Implement OnCameraMoveListener and set new position for existing marker in onCameraMove

@Override

public void onCameraMove() {



    mMarker.setPosition(mMap.getCameraPosition().target);



}

answered Mar 1 '17 at 9:16

kalpeshdeo

6211514

add a comment |

Jahangir KabirJahangir Kabir 728512 · Accepted Answer · 2017-11-12 01:48:22Z

Inside your onLocationChanged try like this

        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLocationLatLng, 18));

        if(myMarker == null) {

            myMarker = mMap.addMarker(new MarkerOptions().position(currentLocationLatLng)

                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));

        } else {

            myMarker.setPosition(currentLocationLatLng);

        }

This is the better way to move existing marker then clear and create it again.

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