Sencha Touch Apk and NetworkOnMainThreadException

Question

I developed a Sencha Touch App that uses network connections to call different web services during login process. I build native apk with Sencha CMD and it works right in Android 2.3.7 but not in newer versions. I read that this is a NetworkOnMainThreadException problem. The solutions I found for Android are:

1) to make webservice calls by implementing AsyncTask.

2) use StrictMode Class in Android and set the policy

But how can apply these solutions in my Sencha Javascript App? I really hope that someone of you had found a solution!

Thanks for any advice!

Edit

After some tests I discover that my app works fine in android 2.3.7 but not in android 4 because of one of my webservice. It's a liferay json web service. It's the fourth web service that i call and if i don't call it my app works fine. Does someone of you know if the Android (versions >2.3.7) Web View doesn't support Liferay Web Service?

Answer 1

I think You're performing network operations on UI Thread . This will cause blocking User Interface. Since Android 3.0, performing network operations on UI Thread is not applicable and it throws NetworkOnMainThreadException .

In the API document, it says:

Network operations can involve unpredictable delays. To prevent this from causing a poor user experience, always perform network operations on a separate thread from the UI. The AsyncTask class provides one of the simplest ways to fire off a new task from the UI thread.

So you should use AsyncTask in order to handle this problem.

Check this out link . This can be a sample for writing AsyncTask

If you wonder why this procedure is applied and why this exception is thrown. Check this out as well.

Hope this may help you!