Enable Gps automatically if it is turned off. Similar to what OLA cab does. However to comply with policy it shows a popup to user with OK and CANCEL button. Still its better than showing location setting screen to user

EnableGpsAutomaticallyInAndroid.java

package com.irinnovative.enablegps;

import android.app.Activity;
import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationSettingsRequest;
import com.google.android.gms.location.LocationSettingsResult;
import com.google.android.gms.location.LocationSettingsStates;
import com.google.android.gms.location.LocationSettingsStatusCodes;

import butterknife.ButterKnife;
import butterknife.OnClick;

public class TestActivity extends Activity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);
      
      //  Bind your views manually here
        ButterKnife.bind(this);

    }

    @OnClick(R.id.btnClick)
    public void onClick() {
        EnableGPSAutoMatically();
    }

    private void EnableGPSAutoMatically() {
        GoogleApiClient googleApiClient = null;
        if (googleApiClient == null) {
            googleApiClient = new GoogleApiClient.Builder(this)
                    .addApi(LocationServices.API).addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this).build();
            googleApiClient.connect();
            LocationRequest locationRequest = LocationRequest.create();
            locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
            locationRequest.setInterval(30 * 1000);
            locationRequest.setFastestInterval(5 * 1000);
            LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                    .addLocationRequest(locationRequest);

            // **************************
            builder.setAlwaysShow(true); // this is the key ingredient
            // **************************

            PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi
                    .checkLocationSettings(googleApiClient, builder.build());
            result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
                @Override
                public void onResult(LocationSettingsResult result) {
                    final Status status = result.getStatus();
                    final LocationSettingsStates state = result
                            .getLocationSettingsStates();
                    switch (status.getStatusCode()) {
                        case LocationSettingsStatusCodes.SUCCESS:
                            toast("Success");
                            // All location settings are satisfied. The client can
                            // initialize location
                            // requests here.
                            break;
                        case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                            toast("GPS is not on");
                            // Location settings are not satisfied. But could be
                            // fixed by showing the user
                            // a dialog.
                            try {
                                // Show the dialog by calling
                                // startResolutionForResult(),
                                // and check the result in onActivityResult().
                                status.startResolutionForResult(TestActivity.this, 1000);

                            } catch (IntentSender.SendIntentException e) {
                                // Ignore the error.
                            }
                            break;
                        case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                            toast("Setting change not allowed");
                            // Location settings are not satisfied. However, we have
                            // no way to fix the
                            // settings so we won't show the dialog.
                            break;
                    }
                }
            });
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == 1000) {
            if(resultCode == Activity.RESULT_OK){
                String result=data.getStringExtra("result");
            }
            if (resultCode == Activity.RESULT_CANCELED) {
                //Write your code if there's no result
            }
        }
    }
    @Override
    public void onConnected(@Nullable Bundle bundle) {

    }

    @Override
    public void onConnectionSuspended(int i) {
        toast("Suspended");
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        toast("Failed");
    }
    private void toast(String message) {
        try {
            Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
        } catch (Exception ex) {
            log("Window has been closed");
        }
    }
}

Official documentation from Android can be found here : https://developer.android.com/training/location/change-location-settings.html

can we do this in background

can this be done via fragment call and getActivity Result in fragment?

can we do this in background
Hi yes, I did this with a good way.

After turn on GPS, how can I trun off programatically using same code?