Why do I get an error while trying to set the content of a tabspec in android?

Question

I have an android activity in which I\'m using tabs.

public class UnitActivity extends TabActivity {
  @Override
  public void onCreate(Bundle savedInstanceS         


        

Answer 1

While Activity.setContentView takes an id of a Layout, TabSpec.setContent takes an id of a View. This means you need to pass an id that looks like R.id.something and not R.layout.something.

To solve your particular problem, give the top level view in your layout a view id:

  
  ...

and update your source:

public class UnitActivity extends TabActivity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.unit_view);

    TabHost tabHost = getTabHost();
    TabSpec spec;

    spec = tabHost.newTabSpec("controls");
    spec.setIndicator("Control");
    spec.setContent(R.id.unit_control);  // NOTE THE CHANGE
    tabHost.addTab(spec);

    spec = tabHost.newTabSpec("data");
    spec.setIndicator("Data");
    spec.setContent(R.id.unit_data);   // NOTE THE CHANGE
    tabHost.addTab(spec);
  }
}

For more information, see the tab examples in the ApiDemos: