I am trying to build an app for informing people who don't have access to information available on net. I have completed it 90%, all the bugs that were coming have been resolved. When I launch and click on spinner value my app crashes.
My log cat is:
10-20 20:38:57.298 13722-13742/trial.spinners E/Surface: getSlotFromBufferLocked: unknown buffer: 0xab98af70
10-20 20:38:58.966 13722-13722/trial.spinners E/ANAME =: sector-18
10-20 20:38:59.001 13722-15968/trial.spinners E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
10-20 20:38:59.001 13722-15968/trial.spinners E/AndroidRuntime: Process: trial.spinners, PID: 13722
10-20 20:38:59.001 13722-15968/trial.spinners E/AndroidRuntime: java.lang.RuntimeException: An error occurred while executing doInBackground()
10-20 20:38:59.001 13722-15968/trial.spinners E/AndroidRuntime: at android.os.AsyncTask$3.done(AsyncTask.java:309)
10-20 20:38:59.001 13722-15968/trial.spinners E/AndroidRuntime: at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
public class ServerRequests {
ProgressDialog progressDialog;
public static final int CONNECTION_TIMEOUT = 15000;
public static final String SERVER_ADDRESS = "http://kamster.net16.net/";
public ServerRequests(Context context)
{
progressDialog = new ProgressDialog(context);
progressDialog.setCancelable(false);
progressDialog.setTitle("Processing");
progressDialog.setMessage("Please wait..");
}
public void fetchDataInBackground(Contact contact , GetUserCallback callback)
{
progressDialog.show();
new FetchDataAsyncTask(contact, callback).execute();
}
public class FetchDataAsyncTask extends AsyncTask<Void , Void , Contact>
{
Contact contact;
GetUserCallback callback;
Contact returnedContact;
public FetchDataAsyncTask(Contact contact , GetUserCallback callback)
{
this.contact = contact;
this.callback = callback;
}
@Override
protected Contact doInBackground(Void... voids) {
ArrayList<NameValuePair> data_to_send = new ArrayList<NameValuePair>();
data_to_send.add(new BasicNameValuePair("areaname" , contact.areaname));
data_to_send.add(new BasicNameValuePair("distance" , contact.distance));
HttpParams httpRequestParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpRequestParams , CONNECTION_TIMEOUT);
HttpConnectionParams.setSoTimeout(httpRequestParams , CONNECTION_TIMEOUT);
HttpClient client = new DefaultHttpClient(httpRequestParams);
HttpPost post = new HttpPost(SERVER_ADDRESS + "newInput.php");
// Contact returnedContact = null;
try {
post.setEntity(new UrlEncodedFormEntity(data_to_send));
HttpResponse httpResponse = client.execute(post);
HttpEntity entity = httpResponse.getEntity();
String result = EntityUtils.toString(entity);
try {
JSONObject jsonObject = new JSONObject(result);
returnedContact = null;
if (jsonObject.length() == 0) {
returnedContact = null;
} else {
// String areaname,distance;
// areaname = null;
// distance=null;
// if(jsonObject.has("areaname"))
// areaname = jsonObject.getString("areaname");
// if(jsonObject.has("distance"))
// distance =jsonObject.getString("distance");
// returnedContact = new Contact(areaname,distance);
returnedContact = new Contact(contact.areaname, contact.distance);
}
}catch(JSONException jE){
jE.printStackTrace();
}
}
catch(IOException e)
{
e.printStackTrace();
}
return returnedContact;
}
@Override
protected void onPostExecute(Contact returnedContact) {
progressDialog.dismiss();
callback.done(returnedContact);
super.onPostExecute(returnedContact);
}
}
}
I think the problem is the Json data retrieved. You may refer to this post : Android sending data to php and receiving issue nullpointerexception
Hope it can help you !
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