App works fine in android 2.3.7 and not in 4.1.2

Question

I have an app that works fine in android 2.3.4, 2.3.6 and 2.3.7 but it doesn´t in android 4.1.2 or 4.2.2 (I have no more devices)

The app calls to a jar file that returns a result, when I test the app in 2.3.7 I make the call to the jar and takes the result but when I do it with android 4.1.2 it forces the close. It´s quite weird because the only difference is the OS because the app is the same.

The jar file makes a call to internet, I don´t think this could be the mistake

Thanks again everybody!

`The jar file makes a call to internet, I don´t think this could be the mistake` - This could make a huge difference actually. — Rahul, Apr 05 '13 at 10:21
Is your jar file externally placed or inside the project itself? — Jai Kumar, Apr 05 '13 at 10:22
where is the jar placed? where do you make the call to the jar? post some code. — Ovidiu Latcu, Apr 05 '13 at 10:28
I use HttpClient for the internet. I have no logcat because I have to export the file to be used in the devices. The jar is added in Referenced libraries and Android Dependencies — Ivan, Apr 05 '13 at 10:29
You are targetting it for API level 13 ? Android 4.1 is API level 16 !! You should be targetting for the latest api level, i.e. 17.. — Laksh, Apr 05 '13 at 10:39

score 1 · Accepted Answer · answered Apr 05 '13 at 10:52

The jar file makes a call to internet, I don´t think this could be the mistake

=> Sorry dude problem is here, as you said your app is working fine in < 2.3 versions but not in >2.3, reasons behind this failure is NetworkOnMainThreadException.

Now, Why this exception is being raised whenever you run app in >2.3 version device?

=> NetworkOnMainThreadException occurs whenever an application attempts to perform a networking operation on its main thread.

Solutions:

Below are the two solutions to resolve this issue:

1) Standard way is to make webservice call by implementing AsyncTask.

2) The lazy way of handling this is to turn the check of:

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

Thanks Paresh, I´m with the standard way as RajaReddy said, thanks for the link — Ivan, Apr 05 '13 at 11:00

score 0 · Answer 2 · edited Apr 05 '13 at 11:37

0

From android Versions 4.0 (ICS) onwards networking operation should be run in AsynTask. Run your code in AsyncTask:

private class Task extends AsyncTask<Void, Void, Void> {

    private Exception exception;

    @Override
    protected Void doInBackground(Void... urls) { 
        /// run your network operations here     
        return null;         
    }

    @Override
    protected void onPostExecute(RSSFeed feed) {

   }     
}

 new Task ().execute();

edited Apr 05 '13 at 11:37

Ahmad

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answered Apr 05 '13 at 10:30

RajaReddy PolamReddy

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So RajaReddy what you say is to put the call in the jar in an AsynTask?? – Ivan Apr 05 '13 at 10:33
Network related operation should be in asyncTask. i mean calling network jar related functions should be in main thread. – RajaReddy PolamReddy Apr 05 '13 at 10:36
Thanks RajaReddy I´ll try that and let you know – Ivan Apr 05 '13 at 10:39

App works fine in android 2.3.7 and not in 4.1.2

2 Answers2

Solutions: