android - Scroll not working for multiple RecyclerView in BottomSheet

Question

I implemented BottomSheet using the DialogFragment approach. I have a TabLayout and ViewPager in the BottomSheet. The ViewPager is hosting 2 pages, each inflates a RecyclerView. The first(Coffee tab) RecyclerView scrolls fine. The problem I'm having now is that for the 2nd(Milk tab) the scroll is not working. Any idea how can I fix this? Thanks!

You can test out with the demo project I created here: https://github.com/choongyouqi/bottomsheet`

Answer 1

As mentioned by R. Zagórski, I described the reason for this scrolling behavior here, i.e., BottomSheetBehavior only supports one scrolling child. However this answer wasn't focusing on Bottom Sheet Dialogs.

Therefore – just like R. Zagórski – I extended my own library that overcomes this limitation. Starting with 0.0.3 there is support for Bottom Sheet Dialogs! You can find the library and the example app here: https://github.com/laenger/ViewPagerBottomSheet

To use in your project, simply add the maven repo url to your build.gradle:

repositories {
    maven { url "https://raw.github.com/laenger/maven-releases/master/releases" }
}

Add the library to the dependencies:

dependencies {
    compile "biz.laenger.android:vpbs:0.0.3"
}

Use ViewPagerBottomSheetDialogFragment as super class for Dialog Fragments. Then setup any ViewPager inside the content view:

public class DialogFragment extends ViewPagerBottomSheetDialogFragment {
    @Override
    public void setupDialog(Dialog dialog, int style) {
        super.setupDialog(dialog, style);
        final View contentView = View.inflate(getContext(), R.layout.dialog_bottom_sheet, null);

        final ViewPager viewPager = (ViewPager) contentView.findViewById(R.id.viewpager);
        // ...
        BottomSheetUtils.setupViewPager(viewPager);

        dialog.setContentView(contentView);
    }
}