Question

I have an app that has 2 tabs. Each tab loads an xml file (fairly large, maybe 400 item rss file).

By default the tab doesn’t get the xml until it’s clicked on. I simply wanted a way to load it all when the app is first opened.

Here is the main view:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    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

    // Audio Feed
    intent = new Intent().setClass(this, AudioFeed.class);
    spec = tabHost.newTabSpec("audio").setIndicator("",
                      res.getDrawable(R.drawable.ic_tab_audio))
                  .setContent(intent);
    tabHost.addTab(spec);


    // Video Feed
    intent = new Intent().setClass(this, VideoFeed.class);
    spec = tabHost.newTabSpec("video").setIndicator("",
                      res.getDrawable(R.drawable.ic_tab_video))
                  .setContent(intent);
    tabHost.addTab(spec);

    tabHost.setCurrentTab(0); //todo: remember what tab user was last on
}

Answer 1

I use TabHost.setCurrentTab(x) or TabHost.setCurrentTabByTag(x).

mTabHost.setCurrentTab(1);
mTabHost.setCurrentTab(0);

For Initialization I use TabHost.OnTabChangeListener.

private OnTabChangeListener mOnTabChangeListener = new OnTabChangeListener() {
    @Override
    public void onTabChanged(String tag) {
        if (FBIntent.EXTRA_XX.equals(tag)) {
            // Current tab is xx.
            ... if xx not init -> ...
        } else if (FBIntent.EXTRA_YY.equals(tag)) {
            // Current tab is yy.
            ...
        }
    }
};