Apps Android Java GPS Coordinates SMS LocationListener

[Abdul Smith Mustafi]

I am developing an app where gps coordinates (longitude and latitude) are sent back automatically to the person that sent a message in the first hand. I am testing on both 2 emulators and a smartphone. On an emulator, to hit the location service and send back the coordinates, i must press send in the location settings of the emulator. If i don't, the coordinates wont get fetched. How should i make it so that when Emulator A sends a message to Emulator B, Emulator B automatically sends the coordinates back to A as text Message without sending the coordinates on the emulator? Thanks


In the OnCreate Method:

        ActivityCompat.requestPermissions(this, new
               String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 0);

       ActivityCompat.requestPermissions(this, new
               String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

       ActivityCompat.requestPermissions(this, new
               String[]{Manifest.permission.SEND_SMS}, 0);

       ActivityCompat.requestPermissions(this, new
               String[]{Manifest.permission.RECEIVE_SMS}, 0);

      // getGPS();
      // something();
      // Toast.makeText(MainActivity.this, "OnCreate Working", Toast.LENGTH_SHORT).show();


       if(ActivityCompat.checkSelfPermission(getBaseContext(), Manifest.permission.ACCESS_FINE_LOCATION)
               != PackageManager.PERMISSION_GRANTED
               || ActivityCompat.checkSelfPermission(getBaseContext(), Manifest.permission.ACCESS_COARSE_LOCATION)
               != PackageManager.PERMISSION_GRANTED)
       {
           if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
           {
               //Ask user for permission if android OS us newer than lollipop
               requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,
                       Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_GPS_PERMISSION);
           }
           else
           {
               Toast.makeText(MainActivity.this, "Permission Denied", Toast.LENGTH_SHORT).show();
           }
       }
       else
       {
           getGPS();
       }

   }

Outside the OnCreate:

@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        //callback user permission
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(requestCode == REQUEST_GPS_PERMISSION)
        {
            if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED))
            {
                //if permission granted by the user
                getGPS();
                something();
            }
            else
            {
                Toast.makeText(MainActivity.this, "Permission Denied", Toast.LENGTH_SHORT).show();
            }
        }
    }

    public void getGPS() {
        Toast.makeText(MainActivity.this, "Getting GPS Test", Toast.LENGTH_SHORT).show();
        manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        listener = new LocationListener() {

            @Override
            public void onLocationChanged(Location location) {

                Toast.makeText(MainActivity.this, "Got GPS Location", Toast.LENGTH_SHORT).show();

                location.getLatitude();
                location.getLongitude();

                 strLongitude = location.convert(location.getLongitude(), location.FORMAT_DEGREES);
                 strLatitude = location.convert(location.getLatitude(), location.FORMAT_DEGREES);


                myLocation = "Latitude: " + strLatitude + " Longitude: " + strLongitude;
                Toast.makeText(MainActivity.this, myLocation, Toast.LENGTH_SHORT).show();

            //    SmsManager smsManager = SmsManager.getDefault();
                // Send a text based SMS
           //     smsManager.sendTextMessage(senderNum, null, myLocation, null, null);

            }

public void something() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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;
    }
    manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);


    Toast.makeText(MainActivity.this, "Started GPS", Toast.LENGTH_SHORT).show();
}

P.s I also tried calling the listener in the on receive but still didn't work :/