收到广播接收者的意图后未发生变化

Question

我收到后，我正在adapter.notifyDataSetChanged()和listView.invalidateViews() 如果条件说“blabla”成立，则接听电话。但我的UI仍然没有得到更新。

public class UserFragment extends Fragment{

public class FragmentReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if(getSetting("CurrentView","").equalsIgnoreCase("blabla")){
                adapter.notifyDataSetChanged();
                listView.invalidateViews(); //this is not updating the UI.

}
}

注意：我尝试通过再次替换相同的片段来调用相同的UserFragment.java来更新更改，但这虽然更新了UI但却提供了例外 - IllegalStateException: Can not perform this action after onSaveInstanceState

我在onReceive方法中的其余代码 -

UserFragment firstFragment = new UserFragment ();
getSupportFragmentManager().beginTransaction()
                    .replace(R.id.headlines_fragment, firstFragment)
                    .addToBackStack(null).commit(); //IllegalStateException: Can not perform this action after onSaveInstanceState

有什么想法吗？

Answer 1

试试这个

public class UserFragment extends Fragment{
public class FragmentReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if(getSetting("CurrentView","").equalsIgnoreCase("blabla")){
                adapter.notifyDataSetChanged();
                listView.invalidateViews(); //this is not updating the UI.
                UserFragment.this.onCreate(savedInstanceState);

}
}