Runs on 2.2 but crashes in Android 3.0

I started out making an app for android 2.2 but now changed to Android 3.0. The app runns fine on 2.2 but when I run it on 3.0 it crashes. Eclipse do not find any errors.

开发者_运维问答

Are there stuff in 2.2 that is not included or in 3.0?

Any suggestions?

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When you do any modification of the title bar like

requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

and say target version = 11 , it will crash as those things are not compatible with the ActionBar.

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Ok, the problem was that I was making a network call in the main thread. This seems not to be allowed in Android 3.0 Honeycomb. I solved the problem with making the network call in an AsyncTask.