Update tabs from a tab's activity in a Android

问题:

I have a TabActivity and am going to have 3 or 4 tabs.

In TabA, I would like to have an ExpandableListView, which will list products. I would like TabC to act as a sort of "shopping cart", probably with a ListView of itself.

Is there a way to interact with the TabHost from the Activity? I would like to be able to click a button inside of TabA and have it update and switch to TabC. Is this possible? Can I get the Tab's activities call its parents methods?

回答1:

If you implement your tabs as views, rather than individual activities, this would be far simpler, run faster, take up less memory, and be a better solution IMHO.

That being said, in the Tab A Activity, call getParent() to get at the TabActivity. Then, you can use the methods pointed out by disretrospect.

回答2:

Try to use this code to change activity within a tab:

TabActivity parent = (TabActivity) getParent();
TabHost tabhost = parent.getTabHost();
tabhost.setCurrentTab(0);

回答3:

You can call getTabHost from a TabActivity, see public TabHost getTabHost().

See Tabhost for setCurrentTab, public void setCurrentTab(int index).

回答4:

1. In your Activity, use getParent() to get the TabActivity parent
2. In your TabActivity class, use getLocalActivityManager().getActivity(tabId) to get the Activity object
3. call the Activity object's method