Android project working in 2.2(Level8) and 2.3.3(level10) not working in 4.2.2(level16)?

Question

in my project JSONObject and JSONArray data work in level 8 and level 10 but same code not working level 16 why this happen here is my code

  HttpClient httpclient = new DefaultHttpClient();

    HttpGet httpget = new HttpGet(url);
    HttpResponse response;
    try {
        response = httpclient.execute(httpget);
        Log.i("response", "response" + response);
        HttpEntity entity = response.getEntity();
        Log.i("entity", "entity" + entity);

        if (entity != null) {

            InputStream instream = entity.getContent();
            String result = convertStreamToString(instream);
            JSONObject json = new JSONObject(result);

            JSONObject jsonOnb = json.getJSONObject("query").getJSONObject("pages") ;
            JSONObject pagesObj = jsonOnb.getJSONObject(jsonOnb.names().getString(0));          

            Log.i("pageid", "pageid= " +pagesObj.get("pageid"));                   
            Log.i("title", "title= " +pagesObj.get("title"));  
            instream.close();
        }
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

this code working in level 8 and 10 but not working level 16 facing this errors in level 16

02-18 16:00:22.480: D/AndroidRuntime(605): Shutting down VM
02-18 16:00:22.480: W/dalvikvm(605): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
02-18 16:00:22.500: E/AndroidRuntime(605): FATAL EXCEPTION: main
02-18 16:00:22.500: E/AndroidRuntime(605): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.a/com.example.a.MainActivity}: android.os.NetworkOnMainThreadException
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.os.Looper.loop(Looper.java:137)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.ActivityThread.main(ActivityThread.java:4745)
02-18 16:00:22.500: E/AndroidRuntime(605):  at java.lang.reflect.Method.invokeNative(Native Method)
02-18 16:00:22.500: E/AndroidRuntime(605):  at java.lang.reflect.Method.invoke(Method.java:511)
02-18 16:00:22.500: E/AndroidRuntime(605):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-18 16:00:22.500: E/AndroidRuntime(605):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-18 16:00:22.500: E/AndroidRuntime(605):  at dalvik.system.NativeStart.main(Native Method)
02-18 16:00:22.500: E/AndroidRuntime(605): Caused by: android.os.NetworkOnMainThreadException
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
02-18 16:00:22.500: E/AndroidRuntime(605):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
02-18 16:00:22.500: E/AndroidRuntime(605):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
02-18 16:00:22.500: E/AndroidRuntime(605):  at java.net.InetAddress.getAllByName(InetAddress.java:214)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-18 16:00:22.500: E/AndroidRuntime(605):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
02-18 16:00:22.500: E/AndroidRuntime(605):  at com.example.a.MainActivity.onCreate(MainActivity.java:41)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.Activity.performCreate(Activity.java:5008)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
02-18 16:00:22.500: E/AndroidRuntime(605):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
02-18 16:00:22.500: E/AndroidRuntime(605):  ... 11 more

line 41 isresponse = httpclient.execute(httpget);`

no ... search for "NetworkOnMainThreadException android stackoverflow" ... and DO NOT PLAY with StrictMode ... this is a bad solution ... and negtive mark is for not using search ... asked 100 times in a week — Selvin, Feb 18 '13 at 10:59
@Selvin searching lot of time in google iam not geting proper answer that why asing here... — NagarjunaReddy, Feb 18 '13 at 11:03

score 1 · Answer 1 · answered Feb 18 '13 at 10:59

Thats because you are calling Network Operations(like webService) in the main thread itself.

According to official doc:NetworkOnMainThreadException

The exception that is thrown when an application attempts to perform a networking operation on its main thread.

This is only thrown for applications targeting the Honeycomb SDK or higher. Applications targeting earlier SDK versions are allowed to do networking on their main event loop threads, but it's heavily discouraged.

Its Better to use AsyncTask

score 0 · Accepted Answer · answered Feb 18 '13 at 10:47

0

You need to add these two line of code on your onCreate() function

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();

StrictMode.setThreadPolicy(policy);

answered Feb 18 '13 at 10:47

Bucks

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Android project working in 2.2(Level8) and 2.3.3(level10) not working in 4.2.2(level16)?

2 Answers2