Restart single activity within a tabactivity

As title, I have read some articles. And I wrote this to do so.

public class TabManager {
    private static Context tabAct;
    private static final String TAG = "TabManager"; 

    public static void setTabActivity(Context t) {
        Log.i(TAG, "setTabActivity");
        tabAct = t;
    }

    public static void restart(String tid, Class act) {
        Log.i(TAG, "restart " + tid);
        LocalActivityManager manager = ((ActivityGroup) tabAct).getLocalActivityManager();
        manager.destroyActivity(tid, true);
        manager.startActivity(tid, new Intent(tabAct, act));
    }
}

However, when I did

TabManager.restart("tid4", MyActivity.class);

The activity was destroyed but it didn't start. Could someone give me some advices? Thanks!

Take a look at the documentation of the LocalActivityManager. It says calling startActivity will restart the activity if it meets some conditions. So the call to destroyActivity is not required.