Avoid recreating same view when perform tab switching

Question

Current, I have 2 Fragments, which is switch-able through ActionBar\'s tab.

    getSupportActionBar().setNavigationMode(ActionBar.NAVIG         


        

Answer 1

I started searching for a simple solution for this many hours ago and finally stumbled across the answer by @roger which saved me lots of hair....

When using the ViewPager in other implementations, I could simply call:

mViewPager.setOffscreenPageLimit(//number of pages to cache);

So, I was very surprised it took me so many hours to resolve this. The example he gave wasn't entirely clear though, so for the sake of completeness, here is the code I use for the Fragments in my FragmentTabHost

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class FragmentExample extends Fragment {

    private View rootView;

    public FragmentExample() {
    }

    @Override
    public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {

        if (rootView == null) {

            rootView = inflater.inflate(R.layout.fragment_example_layout, container, false);

            // Initialise your layout here

        } else {
            ((ViewGroup) rootView.getParent()).removeView(rootView);
        }

        return rootView;
    }
}

I searched for the following key phrases which I'm adding here, in the hope that I may save someone else from the frustration I've just experienced!

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FragmentTabHost save Fragment state

FragmentTabHost views recreated

FragmentTabHost cache Fragments

FragmentTabHost onCreateView Fragment destroyed

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