(1)AndroidManifest.xml file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.journaldev.gpslocationtracking"> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <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> </application> </manifest>
(2)LocationTrack.java file
package com.om.gpslocationtracking; import android.Manifest; import android.app.Service; 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.Bundle; import android.os.IBinder; import android.provider.Settings; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AlertDialog; import android.widget.Toast; /** * Created by anupamchugh on 28/11/16. */ public class LocationTrack extends Service implements LocationListener { private final Context mContext; boolean checkGPS = false; boolean checkNetwork = false; boolean canGetLocation = false; Location loc; double latitude; double longitude; private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; protected LocationManager locationManager; public LocationTrack(Context mContext) { this.mContext = mContext; getLocation(); } private Location getLocation() { try { locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE); // get GPS status checkGPS = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); // get network provider statuscheckNetwork = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!checkGPS && !checkNetwork) { Toast.makeText(mContext, "No Service Provider is available",Toast.LENGTH_SHORT).show(); } else { this.canGetLocation = true; // if GPS Enabled get lat/long using GPS Servicesif (checkGPS) { if (ActivityCompat.checkSelfPermission(mContext,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED&& ActivityCompat.checkSelfPermission(mContext,Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED){ // TODO: Consider calling // ActivityCompat#requestPermissions // 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 ActivityCompat#requestPermissions for more details. } locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this); if (locationManager != null) { loc = locationManager .getLastKnownLocation(LocationManager.GPS_PROVIDER); if (loc != null) { latitude = loc.getLatitude(); longitude = loc.getLongitude(); } } } /*if (checkNetwork) { if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling // ActivityCompat#requestPermissions // 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 ActivityCompat#requestPermissions for more details. } locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this); if (locationManager != null) { loc = locationManager .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); } if (loc != null) { latitude = loc.getLatitude(); longitude = loc.getLongitude(); } }*/ } } catch (Exception e) { e.printStackTrace(); } return loc; } public double getLongitude() { if (loc != null) { longitude = loc.getLongitude(); } return longitude; } public double getLatitude() { if (loc != null) { latitude = loc.getLatitude(); } return latitude; } public boolean canGetLocation() { return this.canGetLocation; } public void showSettingsAlert() { AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); alertDialog.setTitle("GPS is not Enabled!"); alertDialog.setMessage("Do you want to turn on GPS?"); alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { Intent intent = newIntent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); mContext.startActivity(intent); } }); alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); alertDialog.show(); } public void stopListener() { if (locationManager != null) { if (ActivityCompat.checkSelfPermission(mContext,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED&& ActivityCompat.checkSelfPermission(mContext,Manifest.permission.ACCESS_COARSE_LOCATION) !=PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling// ActivityCompat#requestPermissions// 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 ActivityCompat#requestPermissions for more details. return; }locationManager.removeUpdates(LocationTrack.this); } } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onLocationChanged(Location location) { } @Override public void onStatusChanged(String s, int i, Bundle bundle){ } @Override public void onProviderEnabled(String s) { } @Override public void onProviderDisabled(String s) { } }(2)write code for res/layout/activity_main.xml file:<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"android:layout_width="match_parent" android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.journaldev.gpslocationtracking.MainActivity"><Button android:layout_width="wrap_content"android:layout_height="wrap_content" android:id="@+id/btn"android:layout_centerInParent="true" android:text="GET LOCATION" /> </RelativeLayout>(3) Write code for MainActivity.java file:package com.om.gpslocationtracking; import android.annotation.TargetApi; import android.content.DialogInterface; import android.content.pm.PackageManager; import android.os.Build; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.Toast; import java.util.ArrayList; import static android.Manifest.permission.ACCESS_COARSE_LOCATION; import static android.Manifest.permission.ACCESS_FINE_LOCATION; public class MainActivity extends AppCompatActivity { private ArrayList<String> permissionsToRequest; private ArrayList<String> permissionsRejected = new ArrayList<>(); private ArrayList<String> permissions = new ArrayList<>(); private final static int ALL_PERMISSIONS_RESULT = 101; LocationTrack locationTrack; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); permissions.add(ACCESS_FINE_LOCATION); permissions.add(ACCESS_COARSE_LOCATION); permissionsToRequest = findUnAskedPermissions(permissions); //get the permissions we have asked for before but are not granted.. //we will store this in a global list to access later. if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (permissionsToRequest.size() > 0) requestPermissions(permissionsToRequest.toArray(new String[permissionsToRequest.size()]), ALL_PERMISSIONS_RESULT); } Button btn = (Button) findViewById(R.id.btn); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { locationTrack = new LocationTrack(MainActivity.this); if (locationTrack.canGetLocation()) { double longitude = locationTrack.getLongitude(); double latitude = locationTrack.getLatitude(); Toast.makeText(getApplicationContext(), "Longitude:"+ Double.toString(longitude) + "\nLatitude:" + Double.toString(latitude),Toast.LENGTH_SHORT).show(); } else { locationTrack.showSettingsAlert(); } } }); } private ArrayList<String> findUnAskedPermissions(ArrayList<String> wanted) { ArrayList<String> result = new ArrayList<String>(); for (String perm : wanted) { if (!hasPermission(perm)) { result.add(perm); } } return result; } private boolean hasPermission(String permission) { if (canMakeSmores()) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { return (checkSelfPermission(permission) ==PackageManager.PERMISSION_GRANTED); } } return true; } private boolean canMakeSmores() { return (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP_MR1); } @TargetApi(Build.VERSION_CODES.M) @Override public void onRequestPermissionsResult(int requestCode,String[] permissions, int[] grantResults) { switch (requestCode) { case ALL_PERMISSIONS_RESULT: for (String perms : permissionsToRequest) { if (!hasPermission(perms)) { permissionsRejected.add(perms); } } if (permissionsRejected.size() > 0) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){ if (shouldShowRequestPermissionRationale(permissionsRejected.get(0))){ showMessageOKCancel("These permissions are mandatory for the application. Please allow access.", new DialogInterface.OnClickListener(){ @Override public void onClick(DialogInterface dialog, int which) { if (Build.VERSION.SDK_INT >=Build.VERSION_CODES.M) { requestPermissions(permissionsRejected.toArray(new String[permissionsRejected.size()]),ALL_PERMISSIONS_RESULT); } } }); return; } } } break; } } private void showMessageOKCancel(String message,DialogInterface.OnClickListener okListener) { new AlertDialog.Builder(MainActivity.this) .setMessage(message) .setPositiveButton("OK", okListener) .setNegativeButton("Cancel", null) .create() .show(); } @Override protected void onDestroy() { super.onDestroy(); locationTrack.stopListener(); } }Output:
