MainActivity.java

package com.headdetect.android.mocklocation;

import android.app.Activity;

import android.app.ActionBar;
import android.app.FragmentManager;
import android.location.Location;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.widget.DrawerLayout;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationClient;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;


public class MainActivity extends Activity implements NavigationDrawerFragment.NavigationDrawerCallbacks {

    /**
     * Fragment managing the behaviors, interactions and presentation of the navigation drawer.
     */
    private NavigationDrawerFragment mNavigationDrawerFragment;

    /**
     * Used to store the last screen title. For use in {@link #restoreActionBar()}.
     */
    private CharSequence mTitle;

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

        mNavigationDrawerFragment = (NavigationDrawerFragment)
                getFragmentManager().findFragmentById(R.id.navigation_drawer);
        mTitle = getTitle();

        // Set up the drawer.
        mNavigationDrawerFragment.setUp(
                R.id.navigation_drawer,
                (DrawerLayout) findViewById(R.id.drawer_layout));
    }

    @Override
    public void onNavigationDrawerItemSelected(int position) {
        // update the main content by replacing fragments
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.container, LocationMapFragment.newInstance(position + 1))
                .commit();
    }

    public void onSectionAttached(int number) {
        switch (number) {
            case 1:
                mTitle = getString(R.string.title_section1);
                break;
            case 2:
                mTitle = getString(R.string.title_section2);
                break;
        }
    }

    public void restoreActionBar() {
        ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setTitle(mTitle);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        if (!mNavigationDrawerFragment.isDrawerOpen()) {
            // Only show items in the action bar relevant to this screen
            // if the drawer is not showing. Otherwise, let the drawer
            // decide what to show in the action bar.
            getMenuInflater().inflate(R.menu.maps, menu);
            restoreActionBar();
            return true;
        }
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_set_location) {
            if(LocationMapFragment.currentMarker != null) {
                MarkerOptions marker = LocationMapFragment.currentMarker;

                try {
                    setMockLocation(marker.getPosition());
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                Toast.makeText(this, "Location Set to " + marker.getTitle(), Toast.LENGTH_SHORT).show();

            } else {
                Toast.makeText(this, "You must mark location on map", Toast.LENGTH_SHORT).show();
            }
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private LocationClient client;
    public void setMockLocation(final LatLng location) throws InterruptedException {
        client = new LocationClient(this, new GooglePlayServicesClient.ConnectionCallbacks() {
            @Override
            public void onConnected(Bundle bundle) {
                client.setMockMode(true);

                Location newLocation = new Location("flp");
                newLocation.setLatitude(location.latitude);
                newLocation.setLongitude(location.longitude);
                newLocation.setAccuracy(3f);

                client.setMockLocation(newLocation);
            }

            @Override
            public void onDisconnected() {

            }
        }, new GoogleApiClient.OnConnectionFailedListener() {
            @Override
            public void onConnectionFailed(ConnectionResult connectionResult) {
                Toast.makeText(MainActivity.this, "Make sure that Mock Location is enabled in developer settings", Toast.LENGTH_SHORT).show();
            }
        });
        client.connect();
    }

}