tabactivity android中的自定义标题栏按钮

嘿。如何通过TabActivity在自定义标题栏中添加按钮？我可以根据调用的子活动设置标题文本视图。但我不知道如何添加按钮

我的活动：

public class TabsManager extends TabActivity {

static TabsManager mTab;

@Override
protected  void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mTab = this;
    requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
    setContentView(R.layout.tabhostbottom);
    }
public void setMyTitle(String string) {

    ((Activity) mTab).getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);
    TextView textView = (TextView) findViewById(R.id.header);
    textView.setText(string);       
}

我的亚活动：

@Override
protected void onResume() {
    super.onResume();
    TabsManager.mTab.setMyTitle("Activity1");
}

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

    setContentView(R.layout.main_club);         
    TabsManager.mTab.setMyTitle("Activity1");
     }