Async Task Une erreur s'est produite lors de l'exécution de doInBackground()

De mon question précédente

Je recevais NullPointor exception. J'ai donc fait quelques modifications dans mon code et maintenant, la barre de progression s'affiche mais trouver ci-dessous les erreurs.

11-17 23:39:51.373: ERROR/AndroidRuntime(495): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
11-17 23:39:51.373: ERROR/AndroidRuntime(495): java.lang.RuntimeException: An error occured while executing doInBackground()
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at android.os.AsyncTask$3.done(AsyncTask.java:200)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
11-17 23:39:51.373: ERROR/AndroidRuntime(495):     at java.lang.Thread.run(Thread.java:1096)
11-17 23:39:51.373: ERROR/AndroidRuntime(495): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

Code est...

 public class JsonExampleActivity extends ListActivity {
/** Called when the activity is first created. */
ProgressDialog mDialog;
final String TAG="a.c.b";
JSONFunction JSONfunction;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listplaceholder);
new JSONPasingShowList().execute();
}
public void updateWithNewLocation(Location location2) {
if(location2!=null) {
double geoLat = location2.getLatitude();
double geoLng = location2.getLongitude();
}
}
class JSONPasingShowList extends AsyncTask<String, Integer,ArrayList<HashMap<String,String>>>
{
@Override
protected void onPreExecute() {
super.onPreExecute();
mDialog = new ProgressDialog(JsonExampleActivity.this);
mDialog.setCancelable(true);
mDialog.setMessage("Loading...");
mDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mDialog.setProgress(0);
mDialog.show();
}
@Override
protected ArrayList<HashMap<String,String>> doInBackground(String... params) {
double latitude[]=new double[20];
double longitude[]=new double[20];
String reference[]=new String[20];
double distance[]=new double[20];
LocationManager locationManager;
String context=Context.LOCATION_SERVICE;
locationManager=(LocationManager)getSystemService(context);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationManager.getBestProvider(criteria, true);
Location location = locationManager.getLastKnownLocation(provider);
final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
updateWithNewLocation(location);
}
public void onProviderDisabled(String provider){
updateWithNewLocation(null);
}
public void onProviderEnabled(String provider){ }
public void onStatusChanged(String provider, int status,
Bundle extras){ }
};
updateWithNewLocation(location);
locationManager.requestLocationUpdates(provider, 2000, 10,
locationListener);
double geoLat = location.getLatitude();
Log.v(TAG, "hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii"+geoLat);
double geoLng = location.getLongitude();
Log.v(TAG, "hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii"+geoLng);
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
JSONObject  json=JSONFunction.getJSONfromURL("https://maps.googleapis.com/maps/api/place/search/json?location=37.422006,-122.084095&radius=1000&types=doctor&sensor=true&key=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
try{
JSONArray  JArray = json.getJSONArray("results");
Log.v(TAG, "getting results");
for(int i=0;i<JArray.length();i++){                     
HashMap<String, String> map = new HashMap<String, String>();    
JSONObject e = JArray.getJSONObject(i);
JSONObject location1=e.getJSONObject("geometry").getJSONObject("location");
latitude[i]=location1.getDouble("lat");
longitude[i]=location1.getDouble("lng");
reference[i]=e.getString("reference");
Log.v(TAG, reference[i]);
distance[i]=GetLatAndLng.gps2m(geoLat, geoLng,latitude[i] ,longitude[i]); 
map.put("id",  String.valueOf(i));
map.put("name", "" + e.getString("name"));
map.put("vicinity", "Address " +  e.getString("vicinity")+" "+"Disance:"+distance[i]);
mylist.add(map);                        
}   }catch(JSONException e)        {
Log.e("log_tag", "Error parsing data "+e.toString());
}
final Intent intent=new Intent(JsonExampleActivity.this ,GetLatAndLng.class);
Bundle b=new Bundle();
b.putStringArray("key", reference);
intent.putExtras(b);   
return mylist;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
}
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
mDialog.dismiss();
ListAdapter adapter = new SimpleAdapter(JsonExampleActivity.this, result , R.layout.listview, 
new String[] { "name", "vicinity", }, 
new int[] { R.id.item_title, R.id.item_subtitle });
setListAdapter(adapter);
mDialog.dismiss();
final ListView lv = getListView();
lv.setTextFilterEnabled(true); 
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {          
@SuppressWarnings("unchecked")
HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);                   
Toast.makeText(JsonExampleActivity.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_SHORT).show();
final Intent intent=new Intent(JsonExampleActivity.this ,GetLatAndLng.class);
intent.putExtra("clickedid",position);
startActivity(intent);
}
});
}
public class MySimpleAdapter extends SimpleAdapter {
public MySimpleAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to) {
super(context, data, resource, from, to);
//TODO Auto-generated constructor stub
}
}
}
}

Ce qui ne va pas?
Merci à l'Avance!!!!!

OriginalL'auteur john smith | 2011-11-17