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PONetworkOnMainThreadException after changing target sdkVersion
 

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  1. PONetworkOnMainThreadException after changing target sdkVersion
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    <p>How do I should this exception?</p> <p>After I changed my target sdkVersion to 13. this issue occurs! What went wrong?</p> <p>This is the logcat output after I tried to load my advertisement</p> <pre><code>02-04 12:51:23.910: E/AndroidRuntime(7379): FATAL EXCEPTION: main 02-04 12:51:23.910: E/AndroidRuntime(7379): android.os.NetworkOnMainThreadException 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099) 02-04 12:51:23.910: E/AndroidRuntime(7379): at java.net.InetAddress.lookupHostByName(InetAddress.java:391) 02-04 12:51:23.910: E/AndroidRuntime(7379): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242) 02-04 12:51:23.910: E/AndroidRuntime(7379): at java.net.InetAddress.getAllByName(InetAddress.java:220) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpConnection.&lt;init&gt;(HttpConnection.java:71) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpConnection.&lt;init&gt;(HttpConnection.java:50) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:460) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:432) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80) 02-04 12:51:23.910: E/AndroidRuntime(7379): at libcore.net.http.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:164) 02-04 12:51:23.910: E/AndroidRuntime(7379): at com.sfa.coverflow.ImageLoader.DisplayAdvert(ImageLoader.java:93) 02-04 12:51:23.910: E/AndroidRuntime(7379): at com.sfa.coverflow.MainActivity$LoadAdvert.onPostExecute(MainActivity.java:869) 02-04 12:51:23.910: E/AndroidRuntime(7379): at com.sfa.coverflow.MainActivity$LoadAdvert.onPostExecute(MainActivity.java:1) 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.os.AsyncTask.finish(AsyncTask.java:602) 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.os.AsyncTask.access$600(AsyncTask.java:156) 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.os.Handler.dispatchMessage(Handler.java:99) 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.os.Looper.loop(Looper.java:137) 02-04 12:51:23.910: E/AndroidRuntime(7379): at android.app.ActivityThread.main(ActivityThread.java:4446) 02-04 12:51:23.910: E/AndroidRuntime(7379): at java.lang.reflect.Method.invokeNative(Native Method) 02-04 12:51:23.910: E/AndroidRuntime(7379): at java.lang.reflect.Method.invoke(Method.java:511) 02-04 12:51:23.910: E/AndroidRuntime(7379): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-04 12:51:23.910: E/AndroidRuntime(7379): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-04 12:51:23.910: E/AndroidRuntime(7379): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>This is my DisplayAdvert method:</p> <pre><code>int advert_id = R.drawable.loader; public void DisplayAdvert(String image_url, int loader, ImageView image) { // TODO Auto-generated method stub advert_id = loader; imageViews.put(image, image_url); try { URL url = new URL(image_url); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setDoInput(true); connection.connect(); InputStream input = connection.getInputStream(); Bitmap myBitmap = BitmapFactory.decodeStream(input); if(myBitmap!=null) image.setImageBitmap(myBitmap); else { queuePhoto(image_url, image); image.setImageResource(loader); } } catch (IOException e) { e.printStackTrace(); } } </code></pre> <p>This is my LoadAdvert method: </p> <pre><code>/** * Background Async Task to Load all product by making HTTP Request * */ class LoadAdvert extends AsyncTask&lt;String, String, String&gt; { /** * getting All products from url * */ protected String doInBackground(String... args) { // Building Parameters List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;(); // getting JSON string from URL JSONObject json = jParser.makeHttpRequest(url_advertisement, "GET", params); // Check your log cat for JSON reponse Log.d("Advert: ", json.toString()); try { // Checking for SUCCESS TAG int success = json.getInt(TAG_SUCCESS); if (success == 1) { // ADVERT FOUND // RETRIEVE ADVENT URL advert = json.getJSONArray(TAG_PHOTOS); for (int i = 0; i &lt; advert.length(); i++) { JSONObject c = advert.getJSONObject(i); // STORE EACH JSON ITEM IN VARIABLE banner_url = c.getString(TAG_BANNER_IMAGE); banner_url = banner_url.toString(); Log.d("banner URL", banner_url); advert_url = c.getString(TAG_ADVERT_URL); advert_url = advert_url.toString(); Log.d("advert URL", advert_url); } } else { } } catch (JSONException e) { e.printStackTrace(); } return null; } /** * After completing background task Dismiss the progress dialog * **/ protected void onPostExecute(String file_url) { // Loader image - will be shown before loading image int loader = R.drawable.loader; // Imageview to show ImageView image = (ImageView) findViewById(R.id.img_advert); // Image url String imageUrl = banner_url; // ImageLoader class instance ImageLoader imgLoader = new ImageLoader(getApplicationContext()); // whenever you want to load an image from url // call DisplayImage function // url - image url to load // loader - loader image, will be displayed before getting image // image - ImageView imgLoader.DisplayAdvert(imageUrl, loader, image); } } } </code></pre>
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    1. COIf you are targeting Honeycomb sdk or higher, then you can't perform network operation on main thread. You must have to run all the network related task in background for that you can use AsyncTask.
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      1. USMoin Ahmed
    2. CO`imgLoader.DisplayAdvert(imageUrl, loader, image);` line causing problem just move network related code inside background
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    3. COHi, you mean I have to create an async task in my imgLoader class?
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