StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PONetworkOnMainThreadException even after using asynctask
primarykey
Id
16732924
data
AcceptedAnswerId
16733871
AnswerCount
3
ClosedDate
CommentCount
9
CommunityOwnedDate
CreationDate
2013-05-24T10:31:06.060
FavoriteCount
0
LastActivityDate
2017-06-25T11:49:51.403
LastEditDate
2013-05-24T11:20:10.430
LastEditorUserId
1361357
OwnerUserId
1361357
ParentId
0
PostTypeId
1
Score
0
ViewCount
415
LastEditorDisplayName
text
Body
I have found few questions in stackOverflow related to this topic but was unable to find a suitable answer.In my app,I intend to do network communications via separate thread.So I used asynctask.But even after using asynctask I found the networkOnMainThreadException.Here is my code : <pre><code>private static final String CATEGORY_ALL_FETCHING_URL = "http://qpon.es/coupon/index.php/welcome/categories/all"; private static final String CATEGORY_IMAGE_URL = "http://qpon.es/images/coupons/"; private static final String TAG_CATEGORY_ID = "id"; private static final String TAG_CATEGORY_NAME = "name"; private static final String TAG_CATEGORY_IMAGE = "img"; private static final String TAG_CATEGORY_CREATE_DATE = "created"; private static final String CATEGORY_INTENT = "category"; private ProgressDialog downloadingStatusIndicator = null; private ArrayList<Category> categoryList = null; private CustomCategoryAdapter customAdapter = null; private class CateoryListDataGenerator extends AsyncTask<String, Void, String> { @Override protected void onPreExecute() { super.onPreExecute(); downloadingStatusIndicator = new ProgressDialog(getActivity()); downloadingStatusIndicator.setTitle(R.string.categoryDownloadTitle); downloadingStatusIndicator.setMessage("Retrieving Categories..."); downloadingStatusIndicator.show(); } @Override protected String doInBackground(String... params) { // TODO Auto-generated method stub String response = ""; try { Log.d("BACK THREAD STARTS", "YES"); categoryList = new ArrayList<Category>(); response = JSONParser .getRemoteResponse(CATEGORY_ALL_FETCHING_URL); // Thread.sleep(2000); } catch (Exception e) { Log.d("BACKGROUD", e.getMessage()); } return response; } @Override protected void onPostExecute(String response) { JSONArray categoriesJSON = null; try { categoriesJSON = new JSONArray(response); } catch (JSONException e) { Log.e("JSON Parser", "Error parsing data " + e.toString()); } for (int i = 0; i < categoriesJSON.length(); i++) { Log.d("LOOP BEGINS", "YES"); Category eachCategory = new Category(); JSONObject eachCategoryJSON = null; try { eachCategoryJSON = categoriesJSON.getJSONObject(i); eachCategory.setCategoryName(eachCategoryJSON .getString(TAG_CATEGORY_NAME)); eachCategory.setCategoryCreateDate(eachCategoryJSON .getString(TAG_CATEGORY_CREATE_DATE)); eachCategory.setCategoryImagePath(CATEGORY_IMAGE_URL + eachCategoryJSON.getString(TAG_CATEGORY_IMAGE)); eachCategory.setCategoryID(eachCategoryJSON .getInt(TAG_CATEGORY_ID)); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } categoryList.add(eachCategory); Log.d("CATEGORY INSERTED", categoryList.toString()); } Log.d("CATEGORY LIST", categoryList.toString()); if (categoryList != null || categoryList.size() > 0) { customAdapter.notifyDataSetChanged(); for (int i = 0; i < categoryList.size(); i++) { customAdapter.add(categoryList.get(i)); } downloadingStatusIndicator.dismiss(); customAdapter.notifyDataSetChanged(); } Toast.makeText(getActivity(), response, Toast.LENGTH_SHORT).show(); } } </code></pre> In JSONParder's setRemoteRenponse() method : <pre><code>boolean isURLFetched = false; while(!isURLFetched){ DefaultHttpClient client = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(url); try { HttpResponse execute = client.execute(httpGet); content = execute.getEntity().getContent(); isURLFetched = true; } catch (UnsupportedEncodingException e) { Log.d("HERE", "ONE"); e.printStackTrace(); } catch (ClientProtocolException e) { Log.d("HERE", "TWO"); e.printStackTrace(); } catch (IOException e) { Log.d("HERE", "THREE"); e.printStackTrace(); } } try { BufferedReader buffer = new BufferedReader(new InputStreamReader( content)); String s = ""; while ((s = buffer.readLine()) != null) { response += s; } } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString()); } return response; </code></pre> Lastly the asynctask class object is created & executed in the fragment's onActivityCreated() method : <pre><code>CateoryListDataGenerator dataGenerator = new CateoryListDataGenerator(); dataGenerator.execute(new String[] { CATEGORY_ALL_FETCHING_URL }); </code></pre> Am I doing something wrong here? I have included INTERNET permission too.For now,I have changed the thread policy to work this app on android 3.0 or higher but this is no solution. Here is the logcat message: <pre><code>05-24 17:11:36.025: E/AndroidRuntime(708): FATAL EXCEPTION: main 05-24 17:11:36.025: E/AndroidRuntime(708): android.os.NetworkOnMainThreadException 05-24 17:11:36.025: E/AndroidRuntime(708): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 05-24 17:11:36.025: E/AndroidRuntime(708): at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 05-24 17:11:36.025: E/AndroidRuntime(708): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 05-24 17:11:36.025: E/AndroidRuntime(708): at java.net.InetAddress.getAllByName(InetAddress.java:214) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273) 05-24 17:11:36.025: E/AndroidRuntime(708): at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168) 05-24 17:11:36.025: E/AndroidRuntime(708): at com.example.couponapp.adapters.CustomCategoryAdapter.getScaledBitmapFromFile(CustomCategoryAdapter.java:83) 05-24 17:11:36.025: E/AndroidRuntime(708): at com.example.couponapp.adapters.CustomCategoryAdapter.getView(CustomCategoryAdapter.java:58) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.AbsListView.obtainView(AbsListView.java:2267) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.ListView.makeAndAddView(ListView.java:1769) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.ListView.fillDown(ListView.java:672) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.ListView.fillFromTop(ListView.java:733) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.ListView.layoutChildren(ListView.java:1608) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.AbsListView.onLayout(AbsListView.java:2102) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.View.layout(View.java:13754) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewGroup.layout(ViewGroup.java:4362) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:948) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.View.layout(View.java:13754) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewGroup.layout(ViewGroup.java:4362) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.View.layout(View.java:13754) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewGroup.layout(ViewGroup.java:4362) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.View.layout(View.java:13754) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewGroup.layout(ViewGroup.java:4362) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1649) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1507) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.LinearLayout.onLayout(LinearLayout.java:1420) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.View.layout(View.java:13754) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewGroup.layout(ViewGroup.java:4362) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.View.layout(View.java:13754) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewGroup.layout(ViewGroup.java:4362) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1866) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1687) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.Choreographer.doCallbacks(Choreographer.java:555) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.Choreographer.doFrame(Choreographer.java:525) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.os.Handler.handleCallback(Handler.java:615) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.os.Handler.dispatchMessage(Handler.java:92) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.os.Looper.loop(Looper.java:137) 05-24 17:11:36.025: E/AndroidRuntime(708): at android.app.ActivityThread.main(ActivityThread.java:4745) 05-24 17:11:36.025: E/AndroidRuntime(708): at java.lang.reflect.Method.invokeNative(Native Method) 05-24 17:11:36.025: E/AndroidRuntime(708): at java.lang.reflect.Method.invoke(Method.java:511) 05-24 17:11:36.025: E/AndroidRuntime(708): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 05-24 17:11:36.025: E/AndroidRuntime(708): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 05-24 17:11:36.025: E/AndroidRuntime(708): at dalvik.system.NativeStart.main(Native Method) </code></pre>
Tags
<android><android-fragments><android-asynctask>
Title
NetworkOnMainThreadException even after using asynctask
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USSALEH
UserOwnerUserId
1. USSALEH
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.