This exception occurs when you write network code on main thread (UI thread). It will throw following exception
android.os.NetworkOnMainThreadException
Solution:-
Write your network part code on background threat (AsyncTask)
class void extends AsyncTask<String, Void, String> {
private Exception exception;
protected String doInBackground(String... urls) {
try {
// network part
// Don't use user interface here
return null;
} catch (Exception e) {
this.exception = e;
return null;
}
}
protected void onPostExecute(String str) {
// TODO: check this.exception
// TODO: show output on user interface
}
}
For more detail check following links:
How to use background thread in android. Android thread example