MainActivity

class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener, LocationListener {

    private var mLocationManager: LocationManager? = null
    private var mLOcation: Location? = null
    private var storeListFragment: Fragment? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val toolbar = findViewById(R.id.toolbar) as Toolbar
        setSupportActionBar(toolbar)

        val fab = findViewById(R.id.fab) as FloatingActionButton
        fab.setOnClickListener(object : View.OnClickListener() {
            fun onClick(view: View) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show()
            }
        })

        val drawer = findViewById(R.id.drawer_layout) as DrawerLayout
        val toggle = ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)
        drawer.setDrawerListener(toggle)
        toggle.syncState()

        val navigationView = findViewById(R.id.nav_view) as NavigationView
        navigationView.setNavigationItemSelectedListener(this)
        navigationView.setCheckedItem(0)

        mLocationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

            // cek izin
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                //minta izin
                ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
                        1)

                return
            }
        }

        mLocationManager!!.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
                10,
                10f, this)

        PopupUtil.showLoading(this, "", "Finding your location ...")
    }

    private fun loadStoreListFragment() {
        storeListFragment = StoreListFragment()
        supportFragmentManager.beginTransaction().replace(R.id.container, storeListFragment).commit()
    }

    override fun onRequestPermissionsResult(requestCode: Int,
                                            permissions: Array<String>,
                                            grantResults: IntArray) {
        if (requestCode == 1) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //diizinkan
                // baru minta location
                if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

                    return
                }
                mLocationManager!!.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
                        10,
                        10f, this)
                PopupUtil.showLoading(this, "", "Finding your location ...")

            }
        }
    }

    override fun onBackPressed() {
        val drawer = findViewById(R.id.drawer_layout) as DrawerLayout
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START)
        } else {
            super.onBackPressed()
        }
    }

    fun onCreateOptionsMenu(menu: Menu): Boolean {
        // Inflate the menu; this adds items to the action bar if it is present.
        menuInflater.inflate(R.menu.main, menu)
        return true
    }

    fun onOptionsItemSelected(item: MenuItem): Boolean {
        // 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.
        val id = item.getItemId()


        return if (id == R.id.action_settings) {
            true
        } else super.onOptionsItemSelected(item)

    }

    fun onNavigationItemSelected(item: MenuItem): Boolean {
        // Handle navigation view item clicks here.
        val id = item.getItemId()

        if (storeListFragment == null) {
            storeListFragment = StoreListFragment()
        }

        var fragment: Fragment? = null

        if (id == R.id.nav_camera) {
            fragment = storeListFragment
        } else if (id == R.id.nav_gallery) {

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        supportFragmentManager.beginTransaction().replace(R.id.container, fragment).commit()

        val drawer = findViewById(R.id.drawer_layout) as DrawerLayout
        drawer.closeDrawer(GravityCompat.START)
        return true
    }

    fun onLocationChanged(location: Location) {
        PopupUtil.dismissDialog()
        mLOcation = location
        mLocationManager!!.removeUpdates(this)

        Log.d("MainActivity",
                String.format("onLocationChanged: %f %f",
                        location.getLatitude(),
                        location.getLongitude()))

        loadStoreListFragment()
    }

    override fun onStatusChanged(s: String, i: Int, bundle: Bundle) {

    }

    override fun onProviderEnabled(s: String) {

    }

    override fun onProviderDisabled(s: String) {

    }
}