(ActionBar) Tabs + Pager + detail Fragments inside ViewPager container

Question

For ActionBarSherlock I would like to have (Action Bar) Tabs + Pager. I use Fragments inside that pager container. I already got the examples of http://actionbarsherlock.com

Answer 1

I still did not find a possibility to have a Pager container where fragments should be loaded in and also keep the (ActionBar) Tabs. I have however found a really dirty solution to acomplish this, with starting intens (Main Activity with the Tabs) and finishing the previous ones when the backbutton doesn't need it anymore.

I adapted the code from ABS: Support Demos - Tabs and Pager. But again it's really dirty:

LoaderCursorSupport.CursorLoaderListFragment under Tab2

@Override public void onListItemClick(ListView l, View v, int position, long id) {
        Intent intent = new Intent();
        intent.setClass(getActivity(), ActionBarTabsPager.class);
        intent.putExtra("index", position);
        intent.putExtra("fragment", "details");
        intent.putExtra("tab", 1);
        ActionBarTabsPager.mPreviousActivity = getActivity();

        startActivity(intent);

ActionBarTabsPager (Main Activity with Tabs)

public class ActionBarTabsPager extends FragmentActivity {
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
static Activity mPreviousActivity;
static Activity mActivity;
static int mTabPosition = -1;
static Boolean mTabRefreshed = false;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.actionbar_tabs_pager);
    getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    ActionBar.Tab tab1 = getSupportActionBar().newTab().setText("Tab 1");
    ActionBar.Tab tab2 = getSupportActionBar().newTab().setText("Tab 2");
    ActionBar.Tab tab3 = getSupportActionBar().newTab().setText("Tab 3");
    ActionBar.Tab tab4 = getSupportActionBar().newTab().setText("Tab 4");
    String fragment = "";
    try {
        Bundle bundle = this.getIntent().getExtras();
        fragment = bundle.getString("fragment");
        mTabPosition = bundle.getInt("tab");
    } catch (Exception ex) {
    }

    mViewPager = (ViewPager) findViewById(R.id.pager);
    mTabsAdapter = new TabsAdapter(this, getSupportActionBar(), mViewPager);
    mTabsAdapter.addTab(tab1, FragmentStackSupport.CountingFragment.class);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ECLAIR) {
        mTabsAdapter.addTab(tab2, FragmentStackSupport.CountingFragment.class);
        mTabsAdapter.addTab(tab3, FragmentStackSupport.CountingFragment.class);
        mTabsAdapter.addTab(tab4, FragmentStackSupport.CountingFragment.class);
    } else {
        if (!fragment.contains("details")) {
            mTabsAdapter.addTab(tab2, LoaderCursorSupport.CursorLoaderListFragment.class);
        } else {
            mTabsAdapter.addTab(tab2, ExampleFragment.class);
        }
        mTabsAdapter.addTab(tab3, LoaderCustomSupport.AppListFragment.class);
        mTabsAdapter.addTab(tab4, LoaderThrottleSupport.ThrottledLoaderListFragment.class);
    }

    if (savedInstanceState != null) {
        getSupportActionBar().setSelectedNavigationItem(savedInstanceState.getInt("index"));
    }

    if (mTabPosition > -1) {
        mTabsAdapter.setPrimaryItem(mTabPosition);

        mActivity = this;

    }
}

Inside this Class there's a TabsAdapter

public static class TabsAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener, ActionBar.TabListener {
    private final Context mContext;
    private final ActionBar mActionBar;
    private final ViewPager mViewPager;
    private final ArrayList mTabs = new ArrayList();


    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        if (mTabPosition > -1 && mTabRefreshed) {
            int tabPosition = tab.getPosition();
            if (mTabPosition != tabPosition) {
                if (mPreviousActivity != null) {
                    mPreviousActivity.finish();
                    mTabRefreshed = false;
                    mPreviousActivity = null;
                    mTabPosition = -1;
                    Intent intent = new Intent();
                    intent.setClass(mContext, ActionBarTabsPager.class);
                    intent.putExtra("fragment", "home");
                    intent.putExtra("tab", tabPosition);
                    mActivity.startActivity(intent);
                    mActivity.finish();

                }
            }
        }
        mViewPager.setCurrentItem(tab.getPosition());
    }

Can this be done simpler? Or should I just give up on having Tabs together with fragment history? This was done before Android 3.0 with ActivityGroups and Activities, but it seems this can't be done with fragments.