带固定标签的操作栏

Question

Right now in my application I have a TabActivity with three fixed tabs each of them containing a standard Activity .

Here is the relative code snippet:

public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);

    setContentView(R.layout.tab_activity);

    Resources res = getResources(); // Resource object to get Drawables
    TabHost tabHost = getTabHost();  // The activity TabHost
    TabHost.TabSpec spec;  // Resusable TabSpec for each tab
    Intent intent;  // Reusable Intent for each tab

    // Create an Intent to launch an Activity for the tab (to be reused)
    intent = new Intent().setClass(this, Tab1Activity.class);

    // Initialize a TabSpec for each tab and add it to the TabHost
    spec = tabHost.newTabSpec("tab1").setIndicator("Tab 1", res.getDrawable(R.drawable.Tab1Icon)).setContent(intent);
    tabHost.addTab(spec);

    // Do the same for the other tabs
    intent = new Intent().setClass(this, Tab2Activity.class);
    spec = tabHost.newTabSpec("tab2").setIndicator("Tab 2", res.getDrawable(R.drawable.Tab2Icon)).setContent(intent);
    tabHost.addTab(spec);

    intent = new Intent().setClass(this, Tab3Activity.class);
    spec = tabHost.newTabSpec("tab3").setIndicator("Tab 3", res.getDrawable(R.drawable.Tab3Icon)).setContent(intent);
    tabHost.addTab(spec);

    tabHost.setCurrentTab(0);
}

In this way each time I select a Tab the application will show on screen the Activity associated to that that tab.

I'd like to use the ActionBar design pattern to obtain the same result.

For now I'm just interested in having the fixed tab layout as you can see here :

How should I change my code?

These SO questions did not help much:

• ActionBar Tabs - Fixed and Scrollable?
• ActionBar Tabs with multiple fragments
• Customizing ActionBar Tabs on Android 4

Answer 1

In this way each time I select a Tab the application will show on screen the Activity associated to that that tab.

This approach is officially deprecated.

I'd like to use the ActionBar design pattern to obtain the same result. How should I change my code?

The most straightforward approach is to convert those nested activities to fragments, then commit FragmentTransaction s as the selected tab changes. If you are using the native API Level 11 action bar, you can use the native API Level 11 Fragment class and the FragmentTransaction passed into your TabListener . If you wish to use ActionBarSherlock, you will wind up using the Fragment and FragmentTransaction from the Android Support package.