title: Google Maps Android app with multiple users' location
body: <p>I am attempting to make an app where multiple users send their current location to a remote MySQL database and then each user can pull the lat, long coords to see all users on the map.  The problem I am having at the moment is that when I try to send my location to the MySQL database my app crashes.  Any help would be greatly appreciated.  Here is my java activity:</p>
  
  <pre><code>   package com.paul.locations;
  
     import java.text.SimpleDateFormat;
     import java.util.ArrayList;
     import java.util.Calendar;
     import java.util.List;
  
     import org.apache.http.NameValuePair;
     import org.apache.http.message.BasicNameValuePair;
     import org.json.JSONException;
     import org.json.JSONObject;
  
     import com.paul.locations.JSONParser;
     import com.paul.locations.R;
     import com.google.android.gms.maps.GoogleMap;
     import com.google.android.gms.maps.MapFragment;
  
     import android.location.LocationManager;
     import android.os.AsyncTask;
     import android.os.Bundle;
     import android.app.Activity;
     import android.app.ProgressDialog;
     import android.content.Context;
     import android.util.Log;
     import android.view.View;
     import android.view.View.OnClickListener;
     import android.widget.Button;
  
  
     public class Location extends Activity implements OnClickListener {
  private GoogleMap googlemap;
  private String lat="", lon="", current = "";
  private Button  bLoad, bStore;
  
   // Progress Dialog
  private ProgressDialog pDialog;
  
  // JSON parser class
  JSONParser jsonParser = new JSONParser();
  
  //php add a comment script
  
  //localhost :  
  //testing on your device
  //put your local ip instead,  on windows, run CMD &gt; ipconfig
  //or in mac's terminal type ifconfig and look for the ip under en0 or en1
     private static final String LOAD_INFO_URL = "http://192.168.1.14/locations/load_info.php";
    private static final String UPDATE_INFO_URL = "http://192.168.1.14/locations/update_info.php";
  
  
  //testing on Emulator:
  //private static final String POST_COMMENT_URL = "http://10.0.2.2:1234/webservice/addcomment.php";
  
  //testing from a real server:
  //private static final String POST_COMMENT_URL = "http://www.mybringback.com/webservice/addcomment.php";
  
  //ids
  private static final String TAG_SUCCESS = "success";
  private static final String TAG_MESSAGE = "message";
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
  
          setContentView(R.layout.map);
          setUpMap();
  
      bLoad = (Button)findViewById(R.id.bLoad);
      bLoad.setOnClickListener(this);
      bStore = (Button)findViewById(R.id.bStore);
      bStore.setOnClickListener(this);        
  }
  
  @Override
  public void onClick(View v) {
      // TODO Auto-generated method stub
      switch (v.getId()) {
      case R.id.bLoad:
  
          new AttemptLoad().execute();
          break;
      case R.id.bStore:
          LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
          android.location.Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
          lon = Double.toString(location.getLongitude());
          lat = Double.toString(location.getLatitude());
          System.out.println(lon + ", " + lat);
          Calendar c = Calendar.getInstance();
          SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
          current = df.format(c.getTime());
          System.out.println(current);
          new AttemptStore().execute();
          break;
  
      default:
          break;
      }
  }
  
  class AttemptLoad extends AsyncTask&lt;String, String, String&gt; {
  
      @Override
      protected void onPreExecute() {
          super.onPreExecute();
          pDialog = new ProgressDialog(Location.this);
          pDialog.setMessage("Attempting to load locations...");
          pDialog.setIndeterminate(false);
          pDialog.setCancelable(true);
          pDialog.show();
      }
  
      @Override
      protected String doInBackground(String... params) {
          // TODO Auto-generated method stub
          return null;
      }       
  }
  
  class AttemptStore extends AsyncTask&lt;String, String, String&gt; {
  
      @Override
      protected void onPreExecute() {
          super.onPreExecute();
          pDialog = new ProgressDialog(Location.this);
          pDialog.setMessage("Attempting to store your location...");
          pDialog.setIndeterminate(false);
          pDialog.setCancelable(true);
          pDialog.show();
      }
  
      @Override
      protected String doInBackground(String... args) {
          // TODO Auto-generated method stub
          String success;
          try {
              // Building Parameters
              List&lt;NameValuePair&gt; params1 = new ArrayList&lt;NameValuePair&gt;();
              params1.add(new BasicNameValuePair("lat", lat));
              params1.add(new BasicNameValuePair("lon", lon));
              params1.add(new BasicNameValuePair("time", current));
  
              Log.d("request!", "starting");
  
              //Posting user data to script 
              JSONObject json = jsonParser.makeHttpRequest(
                      UPDATE_INFO_URL, "POST", params1);
  
              // full json response
              Log.d("Store location attempt", json.toString());
  
              // json success element
              success = json.getString(TAG_SUCCESS);
              if(success.equals("SUCCESS")) {
                  Log.d("Location Stored!", json.toString());    
                  finish();
                  return json.getString(TAG_MESSAGE);
              }else{
                  Log.d("Storing Location Failure!", json.getString(TAG_MESSAGE));
                  return json.getString(TAG_MESSAGE);
              }
          } catch (JSONException e) {
              e.printStackTrace();
          }           
          return null;
      }
  
      protected void onPostExecute(String file_url) {
          // dismiss the dialog once product deleted
          pDialog.dismiss();
          //if (file_url != null){
              //Toast.makeText(Location.this, file_url, Toast.LENGTH_LONG).show();
          //}
      }
  }
  
  private void setUpMap() {
      if(googlemap == null){
          googlemap = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
  
          if(googlemap != null){
              //code to initialize the map
              googlemap.setMyLocationEnabled(true);
          }
      }
  }   
      }
  </code></pre>
  
  <p>I am fairly certain the error is occurring in the "Attempt Store" class as clicking on the bStore button creates the error</p>
  
  <p>This is the logcat:</p>
  
  <pre><code>   07-31 13:27:40.245: D/SensorManager(30830): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41d55290
     07-31 13:27:40.245: I/SensorManager(30830): Set normal delay = true
     07-31 13:27:40.245: D/SensorManager(30830): registerListener :: handle = 4  name= MPL accel delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41d58410
     07-31 13:27:40.255: W/IInputConnectionWrapper(30830): getSelectedText on inactive InputConnection
     07-31 13:27:40.265: W/IInputConnectionWrapper(30830): setComposingText on inactive InputConnection
     07-31 13:27:43.779: D/request!(30830): starting
     07-31 13:27:43.799: I/Adreno200-EGLSUB(30830): &lt;ConfigWindowMatch:2087&gt;: Format RGBA_8888.
     07-31 13:27:43.829: D/SensorManager(30830): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41d58410
     07-31 13:27:43.829: I/SensorManager(30830): Set normal delay = true
     07-31 13:27:45.241: D/Login attempt(30830): {"message":"Login successful!","success":1}
     07-31 13:27:45.241: D/Login Successful!(30830): {"message":"Login successful!","success":1}
     07-31 13:27:45.661: D/AbsListView(30830): Get MotionRecognitionManager
     07-31 13:27:45.771: I/Adreno200-EGLSUB(30830): &lt;ConfigWindowMatch:2087&gt;: Format RGBA_8888.
     07-31 13:27:45.801: I/Adreno200-EGLSUB(30830): &lt;ConfigWindowMatch:2098&gt;: Format RGBX_8888.
     07-31 13:27:45.961: W/IInputConnectionWrapper(30830): getSelectedText on inactive InputConnection
     07-31 13:27:45.961: W/IInputConnectionWrapper(30830): setComposingText on inactive InputConnection
     07-31 13:27:49.765: I/System.out(30830): -117.21201925, 32.75091863
     07-31 13:27:49.765: I/System.out(30830): 13:27:49
     07-31 13:27:49.796: D/request!(30830): starting
     07-31 13:27:49.816: I/Adreno200-EGLSUB(30830): &lt;ConfigWindowMatch:2087&gt;: Format RGBA_8888.
     07-31 13:27:50.987: E/JSON Parser(30830): Error parsing data org.json.JSONException: Value &lt;br of type java.lang.String cannot be converted to JSONObject
     07-31 13:27:50.987: D/Store location attempt(30830): {"message":"Login successful!","success":1}
     07-31 13:27:50.987: D/Storing Location Failure!(30830): Login successful!
  </code></pre>
  
  <p>The error is the JSON parser cannot parse the data.  I know my PHP scripts are correct because i can send and receive data by just loading them in my browser.  Any help would be super cool</p>
  
  <p>Thanks!</p>