Fixing a crash, some users appear to be getting a null XMLRPCException message.

git-svn-id: https://android.svn.wordpress.org/trunk@891 a6565c4b-a94d-4d28-bb26-aa9e5ab542c0
Moving some FragmentActivity code to onPostResume() in an attempt to fix the "java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState" error when trying to show an alert dialog after resuming. Solution found at: http://code.google.com/p/android/issues/detail?id=23096. Appears to be related to the support library.

git-svn-id: https://android.svn.wordpress.org/trunk@892 a6565c4b-a94d-4d28-bb26-aa9e5ab542c0
Don't attempt to share URL unless we have a valid post.

git-svn-id: https://android.svn.wordpress.org/trunk@893 a6565c4b-a94d-4d28-bb26-aa9e5ab542c0
Fixes ActionBar styles on < 3.0 devices. ActionBarSherlock requires that you duplicate each style item without the 'android:'. See http://actionbarsherlock.com/theming.html. Refs #413

git-svn-id: https://android.svn.wordpress.org/trunk@894 a6565c4b-a94d-4d28-bb26-aa9e5ab542c0
add null check when fetching http resource.

Fixes #415

git-svn-id: https://android.svn.wordpress.org/trunk@895 a6565c4b-a94d-4d28-bb26-aa9e5ab542c0