获取Marshmallow中的当前位置0，其中低于23的API使用fused Location给出确切的当前位置

Question

我得到了当前位置在以下23设备，但得到（0.0,0.0）纬度和经度在23模拟器设备。

编辑当前我正在使用Fused Location Provider获取当前位置

public class ContactUsFragment extends Fragment implements ConnectionCallbacks, OnConnectionFailedListener, LocationListener {
 @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.i("TAG", "OnCreate Called");
    locationManager = (LocationManager) getActivity()
            .getSystemService(Context.LOCATION_SERVICE);
    buildGoogleApiClient();


}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         final Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    view = inflater.inflate(R.layout.fragment_contact_us, container, false);

    Log.i("TAG", "OnCreateView Called");
    setComponants(view);  // **** Method For Set Componants Of Layout

这是地图图像点击它我想得到当前位置，并将其传递给本机谷歌地图应用的设备导航到目标位置

 mapImage.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.i("TAG", "On ImageView Click");


            if (Build.VERSION.SDK_INT >= 23) {

                if (checkPermission(Manifest.permission.ACCESS_FINE_LOCATION, getActivity().getApplicationContext(), getActivity())) {

                    if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                        navigateToGoogleMap();
                    } else {
                        showSettingsAlert();
                    }
                } else {
                    requestPermission(Manifest.permission.ACCESS_FINE_LOCATION, PERMISSION_REQUEST_CODE, getActivity().getApplicationContext(), getActivity());
                }
            } else {

                if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                    navigateToGoogleMap();
                } else {
                    showSettingsAlert();
                }

            }


        }


    });
    return view;
}

下面是获取当前位置的代码

private synchronized void buildGoogleApiClient() {
    Log.i("TAG", "Building GoogleApiClient");
    mGoogleApiClient = new GoogleApiClient.Builder(getActivity().getApplicationContext())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    createLocationRequest();
}

private void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL);
    mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(mLocationRequest);
    //**************************
    builder.setAlwaysShow(true); //this is the key ingredient
    //**************************

}
@Override
public void onConnected(Bundle bundle) {

    Location mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    // Note that this can be NULL if last location isn't already known.
    if (mCurrentLocation != null) {
        // Print current location if not null
        Log.d("DEBUG", "current location: " + mCurrentLocation.toString());
        currentlatitude = mCurrentLocation.getLatitude();
        currentlongitude = mCurrentLocation.getLongitude();
    }
    // Begin polling for new location updates.
    startLocationUpdates();
}

private void startLocationUpdates() {

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

private void stopLocationUpdates() {
    LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}

@Override
public void onConnectionSuspended(int i) {
    if (i == CAUSE_SERVICE_DISCONNECTED) {
        Toast.makeText(getActivity().getApplicationContext(), "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show();
    } else if (i == CAUSE_NETWORK_LOST) {
        Toast.makeText(getActivity().getApplicationContext(), "Network lost. Please re-connect.", Toast.LENGTH_SHORT).show();
    }
    mGoogleApiClient.connect();
}

@Override
public void onLocationChanged(Location location) {
    String msg = "Updated Location: " +
            Double.toString(location.getLatitude()) + "," +
            Double.toString(location.getLongitude());
    Toast.makeText(getActivity().getApplicationContext(), msg, Toast.LENGTH_SHORT).show();

    currentlatitude = location.getLatitude();
    currentlongitude = location.getLongitude();
}

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {

}

*当我在下面的API23设备中使用时，该代码工作正常，但当我在Marshmallow设备上尝试时，它给出了当前位置0.0,0.0*

下面是我的清单文件

    <uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />

<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission-sdk-23 android:name="android.permission.ACCESS_FINE_LOCATION"/>

<uses-library android:name="com.google.android.maps" />

<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".SplashActivity"
        android:label="@string/app_name"
        android:screenOrientation="portrait"
        android:theme="@style/Theme.AppCompat.NoActionBar" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".HomeMainActivity"
        android:label="@string/app_name"
        android:windowSoftInputMode="adjustPan"
        android:screenOrientation="portrait"
        >
        <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>

        <meta-data
            android:name="android.app.searchable"
            android:resource="@layout/searchable" />
    </activity>
    <activity
        android:name=".HomeActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name=".DoctorsDetailsActivity"
        android:screenOrientation="portrait" />
    <activity android:name=".ServiceActivity" />

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

Answer 1

在androidmanifest中添加这些权限。xml

然后转到设置-----

<uses-permission-sdk-23   android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission-sdk-23 android:name="android.permission.ACCESS_FINE_LOCATION"/>

您还可以添加运行时权限。http://developer.android.com/intl/es/training/permissions/requesting.html

GPSTacker。JAVA

import android.Manifest;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location; 
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
import java.security.Provider;

public class GPSTracker extends Activity implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;

public GPSTracker(Context context) {
    this.mContext = context;
    getLocation();
}

public Location getLocation() {
    try {
        locationManager = (LocationManager) mContext
                .getSystemService(LOCATION_SERVICE);

        // getting GPS status
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);
        // getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        if (!isGPSEnabled && !isNetworkEnabled) {
            // no network provider is enabled
        } else {
            this.canGetLocation = true;
            if (isNetworkEnabled) {
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                Log.d("Network", "Network");
                if (locationManager != null) {
                    location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) {
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    }
                }
            }
            // if GPS Enabled get lat/long using GPS Services
            if (isGPSEnabled) {
                if (location == null) {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null) {
                        location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return location;
}

/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app
 */
@TargetApi(Build.VERSION_CODES.M)
public void stopUsingGPS() {
    if (locationManager != null) {
        if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
              // TODO: Consider calling
            //    public void requestPermissions(@NonNull String[] permissions, int requestCode)
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for Activity#requestPermissions for more details.
            return;
        }
        locationManager.removeUpdates(GPSTracker.this);
    }
}

/**
 * Function to get latitude
 */
public double getLatitude() {
    if (location != null) {
        latitude = location.getLatitude();
    }
    // return latitude
    return latitude;
}

/**
 * Function to get longitude
 */
public double getLongitude() {
    if (location != null) {
        longitude = location.getLongitude();
    }
    // return longitude
    return longitude;
}

/**
 * Function to check GPS/wifi enabled
 *
 * @return boolean
 */
public boolean canGetLocation() {
    return this.canGetLocation;
}

/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch Settings Options
 */
public void showSettingsAlert() {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");
    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
    // On pressing Settings button
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });
    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });
    // Showing Alert Message
    alertDialog.show();
}

@Override
public void onLocationChanged(Location currentLocation) {
// TODO Auto-generated method stub
    this.location = currentLocation;
    getLatitude();
    getLongitude();

}

@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}

@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}

DirectionsJSONParser。JAVA

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

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

public class DirectionsJSONParser {

/** Receives a JSONObject and returns a list of lists containing latitude and longitude */
public List<List<HashMap<String,String>>> parse(JSONObject jObject){

    List<List<HashMap<String, String>>> routes = new ArrayList<List<HashMap<String,String>>>() ;
    JSONArray jRoutes = null;
    JSONArray jLegs = null;
    JSONArray jSteps = null;

    try {

        jRoutes = jObject.getJSONArray("routes");

        /** Traversing all routes */
        for(int i=0;i<jRoutes.length();i++){
            jLegs = ( (JSONObject)jRoutes.get(i)).getJSONArray("legs");
            List path = new ArrayList<HashMap<String, String>>();

            /** Traversing all legs */
            for(int j=0;j<jLegs.length();j++){
                jSteps = ( (JSONObject)jLegs.get(j)).getJSONArray("steps");

                /** Traversing all steps */
                for(int k=0;k<jSteps.length();k++){
                    String polyline = "";
                    polyline = (String)((JSONObject)((JSONObject)jSteps.get(k)).get("polyline")).get("points");
                    List<LatLng> list = decodePoly(polyline);

                    /** Traversing all points */
                    for(int l=0;l<list.size();l++){
                        HashMap<String, String> hm = new HashMap<String, String>();
                        hm.put("lat", Double.toString(((LatLng)list.get(l)).latitude) );
                        hm.put("lng", Double.toString(((LatLng)list.get(l)).longitude) );
                        path.add(hm);
                    }
                }
                routes.add(path);
            }
        }

    } catch (JSONException e) {
        e.printStackTrace();
    }catch (Exception e){
    }

    return routes;
}
/**
 * Method to decode polyline points
 * Courtesy : http://jeffreysambells.com/2010/05/27/decoding-polylines-from-google-maps-direction-api-with-java
 * */
private List<LatLng> decodePoly(String encoded) {

    List<LatLng> poly = new ArrayList<LatLng>();
    int index = 0, len = encoded.length();
    int lat = 0, lng = 0;

    while (index < len) {
        int b, shift = 0, result = 0;
        do {
            b = encoded.charAt(index++) - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
        lat += dlat;

        shift = 0;
        result = 0;
        do {
            b = encoded.charAt(index++) - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
        lng += dlng;

        LatLng p = new LatLng((((double) lat / 1E5)),
                (((double) lng / 1E5)));
        poly.add(p);
    }

    return poly;
}
}

现在，无论你想在哪里设置活动中的位置，请添加以下内容

 // create class object
    gps = new GPSTracker(ImageUpload.this);
    // check if GPS enabled
    if (gps.canGetLocation()) {
        double latitude = gps.getLatitude();
        double longitude = gps.getLongitude();

        tv.setText("Latitude:" + latitude + ", Longitude:" + longitude);

    } else {
        // can't get location
        // GPS or Network is not enabled
        // Ask user to enable GPS/network in settings
        gps.showSettingsAlert();
    }

Answer 2

经过一些调试和搜索，我得到了确切的问题

GoogleAppClient OnConnection（）未调用，因此称为onConnectionFailed（）方法

在该方法中，我发现错误代码为2，这意味着需要播放服务更新

所以我把gradle文件中的play service和设备Playservice版本更改为相同，这样我就能得到当前位置

我在这里发布一些代码：

private synchronized void buildGoogleApiClient() {
 Log.i("TAG", "Building GoogleApiClient");
    mGoogleApiClient = new GoogleApiClient.Builder(getActivity().getApplicationContext())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    createLocationRequest();}

private void createLocationRequest() {
    Log.i("TAG", "CreateLocationRequest");
    mLocationRequest = new LocationRequest();
    long UPDATE_INTERVAL = 10 * 1000;
    mLocationRequest.setInterval(UPDATE_INTERVAL);
    long FASTEST_INTERVAL = 10000;
    mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(mLocationRequest);
    //**************************
    builder.setAlwaysShow(true); //this is the key ingredient
    //**************************

}

private void startLocationUpdates() {

    Log.i("TAG", "StartLocationUpdates");

    if (Build.VERSION.SDK_INT >= 23) {
        if (ContextCompat.checkSelfPermission(getActivity().getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(getActivity().getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
                    mLocationRequest, this);

        }
    } else {
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
                mLocationRequest, this);
    }

}

private void stopLocationUpdates() {
    Log.i("TAG", "StopLocationUpdates");
    LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);

}
 @Override
public void onConnectionSuspended(int i) {
    Log.i("TAG", "onConnectionSuspended");
    if (i == CAUSE_SERVICE_DISCONNECTED) {
        Toast.makeText(getActivity().getApplicationContext(), "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show();
    } else if (i == CAUSE_NETWORK_LOST) {
        Toast.makeText(getActivity().getApplicationContext(), "Network lost. Please re-connect.", Toast.LENGTH_SHORT).show();
    }
    mGoogleApiClient.connect();
}

@Override
public void onLocationChanged(Location location) {
    Log.i("TAG", "OnLocationChanged");
    Log.i("TAG", "Current Location==>" + location);
    currentlatitude = location.getLatitude();
    currentlongitude = location.getLongitude();
}


    @Override
public void onConnectionFailed(ConnectionResult connectionResult) {
if (connectionResult.hasResolution()) {
        try {
            // Start an Activity that tries to resolve the error
            connectionResult.startResolutionForResult(getActivity(), connectionResult.RESOLUTION_REQUIRED);
        } catch (IntentSender.SendIntentException e) {
            e.printStackTrace();
        }
    } else {
        Log.e("TAG", "Location services connection failed with code==>" + connectionResult.getErrorCode());
        Log.e("TAG", "Location services connection failed Because of==> " + connectionResult.getErrorMessage());
    }

}

@Override
public void onDestroy() {
    super.onDestroy();
    if (mGoogleApiClient != null)
        mGoogleApiClient.disconnect();
}
@Override
public void onConnected(Bundle bundle) {
    Location mCurrentLocation;

    Log.i("TAG", "OnConnected");
    if (Build.VERSION.SDK_INT >= 23) {
        if (ContextCompat.checkSelfPermission(getActivity().getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(getActivity().getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);

            // Note that this can be NULL if last location isn't already known.
            if (mCurrentLocation != null) {
                // Print current location if not null
                Log.d("DEBUG", "current location: " + mCurrentLocation.toString());
                currentlatitude = mCurrentLocation.getLatitude();
                currentlongitude = mCurrentLocation.getLongitude();
            } else {
                startLocationUpdates();
            }


        }
    } else {
        mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);

        // Note that this can be NULL if last location isn't already known.
        if (mCurrentLocation != null) {
            // Print current location if not null
            Log.d("DEBUG", "current location: " + mCurrentLocation.toString());
            currentlatitude = mCurrentLocation.getLatitude();
            currentlongitude = mCurrentLocation.getLongitude();
        }
        // Begin polling for new location updates.
        startLocationUpdates();
    }
}

有关更多信息，请参阅官方文件https://developers.google.com/android/guides/setup

Answer 3

使用下面的代码。希望这是有用的。

确保只在真实设备上运行此代码。

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"/>

</LinearLayout>

MainActivity.java

import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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 MainActivity extends AppCompatActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener, LocationListener
{
    GoogleMap mGoogleMap;
    SupportMapFragment mapFrag;
    LocationRequest mLocationRequest;
    GoogleApiClient mGoogleApiClient;
    Location mLastLocation;
    Marker mCurrLocationMarker;
    LocationManager locationManager;

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

        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
        {
            checkLocationPermission();
        }
        else
        {
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
            {
                showGPSDisabledAlertToUser();
            }
        }

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

    private void showGPSDisabledAlertToUser()
    {
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
        alertDialogBuilder.setMessage("GPS is disabled in your device. Would you like to enable it?")
                .setCancelable(false)
                .setPositiveButton("Settings", new DialogInterface.OnClickListener()
                {
                    public void onClick(DialogInterface dialog, int id)
                    {
                        Intent callGPSSettingIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        startActivity(callGPSSettingIntent);

                        mapFrag.getMapAsync(MainActivity.this);
                    }
                });
        alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener()
        {
            public void onClick(DialogInterface dialog, int id)
            {
                dialog.cancel();
            }
        });
        AlertDialog alert = alertDialogBuilder.create();
        alert.show();
    }

    @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, android.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, android.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_MAGENTA));
        mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);

        //move map camera
        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));

        //stop location updates
        if (mGoogleApiClient != null)
        {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
        }
    }

    public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

    public boolean checkLocationPermission()
    {
        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            // Should we show an explanation?
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, android.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[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                        MY_PERMISSIONS_REQUEST_LOCATION);
            }
            else
            {
                // No explanation needed, we can request the permission.
                ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                        MY_PERMISSIONS_REQUEST_LOCATION);
            }
            return false;
        }
        else
        {
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
            {
                showGPSDisabledAlertToUser();
            }

            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, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
                    {

                        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
                        {
                            showGPSDisabledAlertToUser();
                        }

                        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
        }
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.sneha.mymapdemo">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="YOUR API KEY"/>

    </application>

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.INTERNET"/>

</manifest>