Android ActionBar Tabs onclick问题

Question

i have a problem with the onclick event for tabs at the ActionBar. I want to "outsource" the ActionBar-Tab logic to a class, so that i can reuse the ActionBar-Tabs-navigation in all activities.

Here is the outsourced "ActionBar-Tab" logic:

public class TabActivity extends Activity implements TabListener 

{

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_tab);

    // Set up the ActionBar to show tabs:
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Add Tabs:
    actionBar.addTab(actionBar.newTab().setText("Dashboard").setTabListener(this),0,true);
    actionBar.addTab(actionBar.newTab().setText("Search").setTabListener(this),1,false);
    actionBar.addTab(actionBar.newTab().setText("Map").setTabListener(this),2,false);
}

@Override
public void onTabSelected(Tab arg0, FragmentTransaction arg1) 
{
    switch(arg0.getPosition())
    {
       case 0:
           Intent dashboard = new Intent(this,DashBoardActivity.class);
           startActivity(dashboard);
       break;

       case 1:
           Intent suche = new Intent(this,SucheActivity.class);
           startActivity(suche);
       break;

       case 2:
           // Start Intent
       break;

       case 3:
           // Start Intent
       break;

       case 4:
         // Start Intent
       break;
    }
}

@Override
public void onTabReselected(Tab arg0, FragmentTransaction arg1) {

}

@Override
public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {

}

}

And here is the DashBoardActivity which extends the TabActivity class:

public class DashBoardActivity extends TabActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dash_board);
}

}

The DashBoardActivity is also the Launcher Activity for my app.

So, my problem. When the App starts, the ActionBar navigation is successfully show as expected. I saw (via Log.i), that when the App starts, the ActionBar's onTabSelected() is called (without clicking it).

As you can see, i want to start different Activities depending on the Tab that was clicked.

The problem: The app starts,- onTabSelected is called automatically on launch,- and then the Activity "DashBoardActivity.class" get started. (but the current activity is DashBoardActivity!?!)

The started Activity extends the TabActivity,- but the ActionBar-Tabs are not show.

Is there a solution ?

Answer 1

Change this line:

actionBar.addTab(actionBar.newTab().setText("Dashboard").setTabListener(this),0,true);

to:

actionBar.addTab(actionBar.newTab().setText("Dashboard").setTabListener(this),0,false);

What I got from the Android Documentation:

public abstract void addTab (ActionBar.Tab tab, int position, boolean setSelected)

• setSelected - True if the added tab should become the selected tab.