Restarting an activity in a single tab in a TabActivity?

问题

I have a TabActivity. Each tab point to a sub activity. This works great.

Is there any clever way to refresh one of the activity tabs? I just want to 'restart' the activity in tab #3 for example. Not sure of a good way to do this other than building in refresh support to the activity itself, or clearing ALL the tabs and recreating all of them.

Thanks,

回答1:

Slightly more dynamic solution:

LocalActivityManager manager = getLocalActivityManager();
String currentTag = tabHost.getCurrentTabTag();
Class<? extends Activity> currentClass = manager.getCurrentActivity().getClass();
manager.destroyActivity(currentTag, true);
manager.startActivity(currentTag, new Intent(this, currentClass));

回答2:

I've not tried this myself, but typically you access each individual tab's Activity using the LocalActivityManager. This can be retrieved in a TabActivity by using getLocalActivityManager().

It looks like you should be able to use destroyActivity() and startActivity() to restart an Activity, though I'm not exactly sure if this will work (as I've not done it myself). One important thing to note is that the id of the Activity will be equivalent to the tag you set for the tab (e.g., the String you provided to TabHost.newTabSpec(String)).

LocalActivityManager manager = getLocalActivityManager();
manager.destroyActivity("tab3", true);
manager.startActivity("tab3", new Intent(this, ThirdTab.class));

回答3:

You can restart the Activity by setting flag. The code is as below.

spec = tabHost  .newTabSpec("tab1")
                .setIndicator("FirstActivity")
                .setContent(new Intent(this,MyFirstActivity.class)
                .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
tabHost.addTab(spec);

回答4:

Here is the solution:

tabHost.setOnTabChangedListener(this);
public void onTabChanged(String tabId) {
        Log.d(LOG_KEY, tabId);
        LocalActivityManager manager = getLocalActivityManager();
        manager.destroyActivity("ID_1", true);
        manager.startActivity("ID_1", new Intent(this, YourMyActivity.class));
    }

来源：https://stackoverflow.com/questions/2429609/restarting-an-activity-in-a-single-tab-in-a-tabactivity

标签

android

android-tabactivity