Question

My TabActivity contains ProgressBar and two tabs (Activities with ListView).

Where does I must initialize progress = (ProgressBar)findViewById(R.id.progress_bc); and how can I set progress.setVisibility(View.GONE); from onItemClick in ListView in Activity?

<ProgressBar 
    android:id="@+id/progress_bc"
    android:indeterminate="true" 
    android:layout_width="18dip" 
    android:layout_height="18dip"
    style="@android:style/Widget.ProgressBar.Small"/>

Answer 1

The initialization should be to the Activity where you want to show the dialog. So it is better to have two ProgressBar, one for every layout of your two Activities and control it there.

So in the tab parent Activity (call it CustomTabActivity):

public ProgressDialog dialog;

In the onCreate() you initialize the dialog.

Now when you want to use it from a child Activity, you use:

((CustomTabActivity)getParent()).dialog.show(); or

((CustomTabActivity)getParent()).dialog.dismiss();

Hope this helps!