I want to fetch user's location on a splash screen, and after fetching location, splash screen must end

I want to fetch user's location on a splash screen, and after fetching location, splash screen must end.

I want to store the latitude and longitude in two strings.

Here is my code : SplashScreen.java

package com.example.black_ghost.miniproject;

import android.content.Intent;
import android.content.SharedPreferences;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;

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

public class SplashScreen extends AppCompatActivity implements GoogleApiClient.CoectionCallbacks, GoogleApiClient.OnCoectionFailedListener
{

private Location mLastLocation;
public LocationManager mLocationManager;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash_screen);
    Thread t=new Thread()
    {
        public void run()
        {
            try
            {
                sleep(2000);

                finish();
                SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SplashScreen.this);
                if(!prefs.getBoolean("firstTime", false))
                {
                    // run your one time code
                    Intent cv=new Intent(SplashScreen.this,FirstTimeActivity.class);
                    startActivity(cv);
                    SharedPreferences.Editor editor = prefs.edit();
                    editor.putBoolean("firstTime", true);
                    editor.commit();
                }else
                {
                    Intent cv=new Intent(SplashScreen.this,MainActivity.class);
                    startActivity(cv);
                }
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
        }
    };
    t.start();
}

@Override
public void onCoected(Bundle bundle) {

}

@Override
public void onCoectionSuspended(int i) {

}

@Override
public void onCoectionFailed(CoectionResult coectionResult) {

}
}

I am new to android, and I have to submit this assignment, please help I want to store the latitude and longitude in two strings.