android - Activity如何动态改变主题不闪动

Question

我现在在给Activity动态换主题时先把Theme id保存在SharedPreferences中，然后用RxBUs发送事件总线让Activity改变Theme，然而这样只有再次打开该Activity主题才会改变；我想通过Activity.recreate()方法立即改变其主题但是有明显闪动，请问有什么好的方法让其不闪动？

Answer 1

If you are switching in an Activity, you can consider setting the attributes of all visible elements of the current interface according to the switched theme plan; if you are switching in a Fragment, the fragment can also set the theme, like this:

@Override
    public View onCreateView(LayoutInflater inflater,
            @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        final Context contextThemeWrapper = new ContextThemeWrapper(
                getActivity(), isDay ? R.style.day : R.style.night);
        LayoutInflater localInflater = inflater
                .cloneInContext(contextThemeWrapper);
        View v = localInflater.inflate(R.layout.fragment_layout, container,
                false);
        return v;
    }

Answer 2

Bilibili has open sourced a solution on github, you can take a look