Implementing a TabListener using the Support Library

Question

I am trying to implement Tab Navigation, but I want to make sure people that have older versions of Android can still use my application. The app in mind ATM is fairly simple, I just want to be able to understand how to implement the layout and then I'll add the missing bits. Anyhow, I have a Container Activity that extends Fragment Activity (to ensure compatibility), and this Activity creates a TabView using an ActionBar (I believe my problem resides here). The app will try to create three tabs and add them to the ActionBar, and I want to make sure the user can scroll back and forth using lateral navigation. Here is TabListener I am trying to implement: ``` public static class TabListener implements ActionBar.TabListener { private Fragment mFragment; private final Activity mActivity; private final String mTag; private final Class mClass; public TabListener(Activity activity, String tag, Class clz) { mActivity = activity; mTag = tag; mClass = clz; } public vo…

Accepted Answer

```
actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

actionBar.setDisplayShowHomeEnabled(false);
actionBar.setDisplayShowTitleEnabled(false);

tabA = actionBar.newTab().setText("");
tabB = actionBar.newTab().setText("");

Fragment fragmentA = new AFragmentTab();
Fragment fragmentB = new BFragmentTab();

tabA.setTabListener(new MyTabsListener(fragmentA));
tabB.setTabListener(new MyTabsListener(fragmentB));

actionBar.addTab(tabA);
actionBar.addTab(tabB);
```

The tab listener is as follows:

```
protected class MyTabsListener implements ActionBar.TabListener{
    private Fragment fragment;

public MyTabsListener(Fragment fragment){
        this.fragment = fragment;
    }
    public void onTabSelected(Tab tab, FragmentTransaction ft){
        ft.add(R.id.layout2, fragment, null);
    }
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
    }
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        ft.remove(fragment);
    }
}
```

and then you make a class for each tab:

```
public class BFragmentTab extends Fragment {

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        return inflater.inflate(R.layout.login, container, false);
    }
}
```

But keep in mind that the action bar isn't supported for android versions below 3.0 . If you want to use it in older versions I suggest you use actionBarSherlock Library.

Implementing a TabListener using the Support Library

Solution

Problem