Fix scrollbars

[Mygod]

This solution is based on NeoSpb's (see #12). Yet simpler and more flexible I think.

I haven't thoroughly tested this but it should work and you should get the idea. 😄

[gregkorossy]

I finally had some time to review the things. As I see, you still don't need to use reflections nor custom classes. Calling getListView().scrollBy(0, 0) in onResume() does the same thing. Quoting from the description of awakenScrollBars():

This method is automatically invoked by scrollBy(int, int) and scrollTo(int, int).

[Mygod]

You're right! I've fixed it now.

[gregkorossy]

I wish we could just enable vertical scrollbars from code instead of using custom styles for that. I was trying to debug the process of initializing scrollbars in a View because calling certain methods seems to do the same thing as declaring scrollbars="vertical" in the layout (or in the styles in our case), but no luck so far...

[Mygod]

If I remember correctly, it's easier to disable scrollbars than to enable them in code because of a bug.

EDIT: Found it.

[Mygod]

http://gph.is/2csjxsu

[gregkorossy]

Is this really needed? Even the Settings in Android has no scrollbars (at least on my HTC).

[Mygod]

@Gericop There is one on my Lineage OS 14.1.

[gregkorossy]

Checked this, the Java modification is not needed anymore, the scrollbars automatically show up and fade away with the XML only. If I can create a solution such that the scrollbars can be turned on / off with a single XML attribute, I'll add it to the styles.

[Mygod]

I don't think it hurts to have a scrollbar.

[FranckRJ]

I would like to have a scrollbar too, Settings on Android 8.0 (Nexus 5X) has a scrollbar.

[gregkorossy]

Scrollbars enabled in v27.0.0.0