使用片段的ViewPager

Question

I am using ViewPager which uses three Fragments, and one of the Fragments uses database operations. So when I launch my application it takes much time to load(because of databse operation) and it crashes most of the time. I used AsyncTask for databse operations in Fragment but still this problem is there. Any other solutions ??

Answer 1

Have you already considered these rules for AsyncTasks?

There are a few threading rules that must be followed for this class to work properly:

• The AsyncTask class must be loaded on the UI thread. This is done automatically as of JELLY_BEAN.
• The task instance must be created on the UI thread. execute(Params...) must be invoked on the UI thread.
• Do not call onPreExecute(), onPostExecute(Result), doInBackground(Params...), onProgressUpdate(Progress...) manually.
• The task can be executed only once (an exception will be thrown if a second execution is attempted.)

from: http://developer.android.com/reference/android/os/AsyncTask.html

Answer 2

Try this site,It will help you

http://tamsler.blogspot.in/2011/10/android-viewpager-and-fragments.html