nullpointer

package id.amikom.jogjabankfinder.activity;

import java.util.ArrayList;

import org.json.JSONObject;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.GoogleMap.OnInfoWindowClickListener;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import id.amikom.jogjabankfinder.GPSHelper;
import id.amikom.jogjabankfinder.JSONHelper;
import id.amikom.jogjabankfinder.R;
import id.amikom.jogjabankfinder.Utils;
import id.amikom.jogjabankfinder.entity.Bank;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.annotation.TargetApi;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.view.KeyEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.AdapterView.OnItemSelectedListener;

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class PetaLokasi extends FragmentActivity implements OnItemSelectedListener, OnInfoWindowClickListener,
        LocationListener
{
    private GoogleMap           map;
    private GPSHelper           gps;
    private LocationManager     locManager;
    private Location            location;
    private JSONHelper          json;
    private LatLng              myLocation;
    private Context             context;

    private ArrayList<Bank>     listBank;
    private Marker              markerMyLocation;
    private final int           ZOOM    = 14;

    private ProgressDialog      pDialog;

    private Spinner             spLokasiBank;
    private ArrayList<String>   listBankSpinner;

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

        spLokasiBank = (Spinner) findViewById(R.id.spinnerBank);
        spLokasiBank.setOnItemSelectedListener(this);
        locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        context = this;

        json = new JSONHelper();

        new AsycnTaskBank().execute();

        setupGPS();

        setupMapIfNeeded();

    }

    private void setupGPS()
    {
        gps = new GPSHelper(context, locManager, this);
        location = gps.getLocation();

        if (location != null)
        {
            myLocation = new LatLng(location.getLatitude(),
                    location.getLongitude());
            onLocationChanged(location);
        }
    }

    private void setupMapIfNeeded()
    {

        if (map == null)
        {
            // map = ((SupportMapFragment)
            // getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB)
            {
                // jika dibawah honeycomb
                Utils.TRACE("API " + Build.VERSION.SDK_INT);
                FragmentManager fragmentManager = getSupportFragmentManager();
                SupportMapFragment supportMapFragment = (SupportMapFragment) fragmentManager.findFragmentById(R.id.map);
                map = supportMapFragment.getMap();

            } else
            {
                Utils.TRACE("API " + Build.VERSION.SDK_INT);
                android.app.FragmentManager fragmentManager = getFragmentManager();
                MapFragment mapFragment = (MapFragment) fragmentManager.findFragmentById(R.id.map);
                map = mapFragment.getMap();

            }
        }

        setupMap();
    }

    private void setupMap()
    {
        map.setOnInfoWindowClickListener(this);

        if (myLocation != null)
        {
            markerMyLocation = map.addMarker(new MarkerOptions()
                    .position(myLocation)
                    .title("Posisi anda")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));

            map.moveCamera(CameraUpdateFactory.newLatLngZoom(myLocation, 14));

        }

    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        // TODO Auto-generated method stub
        if (keyCode == KeyEvent.KEYCODE_BACK)
        {
            startActivity(new Intent(PetaLokasi.this, MenuUtama.class));
            finish();
        }
        return super.onKeyDown(keyCode, event);
    }

    public void tampilSpinner()
    {
        // TODO Auto-generated method stub
        ArrayAdapter<String> bankAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,
                listBankSpinner);
        bankAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        spLokasiBank.setAdapter(bankAdapter);

    }

    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1, int loc, long arg3)
    {
        // TODO Auto-generated method stub

        if (loc != 0)
        {
            tampilBank(loc);
        }

    }

    private void tampilBank(int i)
    {
        i -= 1;
        double lat = listBank.get(i).getLat();
        double lng = listBank.get(i).getLng();
        // String title = listBank.get(i).getName();

        // if (markerBank != null)
        // {
        // markerBank.remove();
        // }
        //
        // markerBank = map.addMarker(new MarkerOptions()
        // .position(new LatLng(lat, lng))
        // .title(title));
        map.animateCamera((CameraUpdateFactory.newLatLngZoom(new LatLng(lat, lng),
                ZOOM)));

    }

    @Override
    public void onInfoWindowClick(Marker marker)
    {
        // TODO Auto-generated method stub

        Bundle bundle = new Bundle();

        bundle.putString("to", marker.getTitle());
        bundle.putDouble("start_lat", myLocation.latitude);
        bundle.putDouble("start_lng", myLocation.longitude);
        bundle.putDouble("end_lat", marker.getPosition().latitude);
        bundle.putDouble("end_lng", marker.getPosition().longitude);

        Intent i = new Intent(PetaLokasi.this,
                Navigasi.class);
        i.putExtras(bundle);
        startActivity(i);
        finish();
    }

    @Override
    public void onLocationChanged(Location location)
    {
        // TODO Auto-generated method stub
        Toast.makeText(this, "Lokasi berubah", Toast.LENGTH_SHORT).show();

        if (markerMyLocation != null)
        {
            markerMyLocation.remove();
            markerMyLocation = map.addMarker(new MarkerOptions()
                    .position(new LatLng(location.getLatitude(),
                            location.getLongitude()))
                    .title("Posisi anda")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
            map.animateCamera(CameraUpdateFactory.newLatLngZoom(new
                    LatLng(location.getLatitude(), location.getLongitude()),
                    14));

        }
    }

    @Override
    public void onProviderDisabled(String provider)
    {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider)
    {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras)
    {
        // TODO Auto-generated method stub

    }

    @Override
    protected void onResume()
    {
        // TODO Auto-generated method stub
        super.onResume();

        int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
        if (resultCode == ConnectionResult.SUCCESS)
        {
            Utils.TRACE("Google service ada");
        } else
        {
            GooglePlayServicesUtil.getErrorDialog(resultCode, this, 1);
        }
    }

    @Override
    protected void onPause()
    {
        // TODO Auto-generated method stub
        super.onPause();
    }

    @Override
    protected void onStart()
    {
        // TODO Auto-generated method stub
        super.onStart();
        // gps.checkGPS();
    }

    @Override
    protected void onStop()
    {
        // TODO Auto-generated method stub
        super.onStop();
        // locManager.removeUpdates(this);
        gps.stopGPS();
    }

    private class AsycnTaskBank extends AsyncTask<Void, Void, Void>
    {

        @Override
        protected Void doInBackground(Void... params)
        {
            // TODO Auto-generated method stub
            String URL = "http://jogjabankfinder.tk/lokasibank.php";

            JSONObject jObj = json.getJSONFromUrl(URL);
            listBank = json.getAllBankLocation(jObj);

            return null;
        }

        @Override
        protected void onPostExecute(Void result)
        {
            // TODO Auto-generated method stub

            pDialog.dismiss();
            runOnUiThread(new Runnable()
            {

                @Override
                public void run()
                {
                    // TODO Auto-generated method stub
                    listBankSpinner = new ArrayList<String>();
                    listBankSpinner.add("Daftar Bank");

                    for (int i = 0; i < listBank.size(); i++)
                    {
                        listBankSpinner.add(listBank.get(i).getName());

                        map.addMarker(new MarkerOptions()
                                .position(new LatLng(listBank.get(i).getLat(), listBank.get(i)
                                        .getLng()))
                                .title(listBank.get(i).getName())
                                .snippet(listBank.get(i).getDesc()));
                    }

                }
            });

            tampilSpinner();
            super.onPostExecute(result);
        }

        @Override
        protected void onPreExecute()
        {
            // TODO Auto-generated method stub
            super.onPreExecute();

            pDialog = new ProgressDialog(PetaLokasi.this);
            pDialog.setMessage("Loading....");
            pDialog.setCancelable(true);
            pDialog.show();
        }

    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0)
    {
        // TODO Auto-generated method stub

    }
}