StickyBottomSheet.java

private void setupRatio(BottomSheetDialog bottomSheetDialog) {
        FrameLayout bottomSheet = bottomSheetDialog.findViewById(R.id.design_bottom_sheet);
        if(bottomSheet == null)
            return;

        //Retrieve button parameters
        buttonLayoutParams = (ConstraintLayout.LayoutParams) binding.sheetButton.getLayoutParams();

        //Retrieve bottom sheet parameters
        BottomSheetBehavior.from(bottomSheet).setState(BottomSheetBehavior.STATE_COLLAPSED);
        ViewGroup.LayoutParams bottomSheetLayoutParams = bottomSheet.getLayoutParams();
        bottomSheetLayoutParams.height = getBottomSheetDialogDefaultHeight();

        expandedHeight = bottomSheetLayoutParams.height;
        int peekHeight = (int) (expandedHeight / 1.3); //Peek height to 70% of expanded height (Change based on your view)

        //Setup bottom sheet
        bottomSheet.setLayoutParams(bottomSheetLayoutParams);
        BottomSheetBehavior.from(bottomSheet).setSkipCollapsed(false);
        BottomSheetBehavior.from(bottomSheet).setPeekHeight(peekHeight);
        BottomSheetBehavior.from(bottomSheet).setHideable(true);

        //Calculate button margin from top
        buttonHeight = binding.sheetButton.getHeight() + 40; //How tall is the button + experimental distance from bottom (Change based on your view)
        collapsedMargin = peekHeight - buttonHeight; //Button margin in bottom sheet collapsed state
        buttonLayoutParams.topMargin = collapsedMargin;
        binding.sheetButton.setLayoutParams(buttonLayoutParams);

        //OPTIONAL - Setting up recyclerview margins
        ConstraintLayout.LayoutParams recyclerLayoutParams = (ConstraintLayout.LayoutParams) binding.sheetRecyclerview.getLayoutParams();
        float k = (buttonHeight - 60) / (float) buttonHeight; //60 is amount that you want to be hidden behind button
        recyclerLayoutParams.bottomMargin = (int) (k*buttonHeight); //Recyclerview bottom margin (from button)
        binding.sheetRecyclerview.setLayoutParams(recyclerLayoutParams);
    }

    //Calculates height for 90% of fullscreen
    private int getBottomSheetDialogDefaultHeight() {
        return getWindowHeight() * 90 / 100;
    }

    //Calculates window height for fullscreen use
    private int getWindowHeight() {
        DisplayMetrics displayMetrics = new DisplayMetrics();
        ((Activity) requireContext()).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        return displayMetrics.heightPixels;
    }