Modify tab indicator dynamically in Android

问题

My application needs to update tab indicator dynamically, I'm trying to do this by invoke TabSpec.setIndicator(), but it doesn't work. Here is my code:

In onCreate method of TabActivity:

tabHost = getTabHost(); 
TabSpec tabSpec = tabHost.newTabSpec("abc");
tabSpec.setIndicator("helloabc");
tabSpec.setContent(new MyViewFactory());
tabHost.addTab(tabSpec);

Now I need to change tab indicator to another string, for example, "xyz"

TabSpec tabSpec = MyTabActivity.getTabSpec();
tabSpec.setIndicator("xyz");

But it doesn't work. So I'd like to know how to change tab indicator after it is added to the tabhost? Many thanks.

Solution

Thanks to @CommonsWare, I make it by using TabWidget.getChildAt, here is my code for your convenience:

TextView title = (TextView) tabHost.getTabWidget().getChildAt(tabId).findViewById(android.R.id.title)
title.setText("xyz");

回答1:

I apologize for my earlier incorrect answer, now deleted.

Try using getChildViewAt() on TabWidget.

回答2:

i managaed with getChildTabViewAt(tabId) instead of childviewAt(id) for multiple tab.

回答3:

Try this:

 TextView title = (TextView) TabHost.getTabWidget().getChildTabViewAt(tabId).findViewById(android.R.id.title);

来源：https://stackoverflow.com/questions/2935781/modify-tab-indicator-dynamically-in-android