TransparentBar

public void setThemeTransparentBar(AppCompatActivity activity, AppBarLayout appBarLayout, Toolbar toolbar, RecyclerView recyclerView) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

            if (appBarLayout == null || toolbar == null || recyclerView == null) return;

            int color = ContextCompat.getColor(activity.getApplicationContext(), R.color.bar_transparent);

            appBarLayout.setBackgroundColor(color);
            toolbar.setBackgroundColor(Color.TRANSPARENT);

            Window window = activity.getWindow();
            window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

            window.setStatusBarColor(color);
            window.setNavigationBarColor(color);

            CoordinatorLayout.LayoutParams coordinatorLayoutParams = (CoordinatorLayout.LayoutParams) recyclerView.getLayoutParams();
            coordinatorLayoutParams.setBehavior(null);

            int statusHeight = ViewUtils.getStatusBarHeight(activity);

            AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
            toolbarLayoutParams.topMargin = statusHeight;
            toolbarLayoutParams.setScrollFlags(0);

            int top = Utils.dpToPx(activity, 8) + ViewUtils.getActionBarSize(activity) + statusHeight;
            int bottom = Utils.dpToPx(activity, 8) + ViewUtils.getNavigationBarHeight(activity.getApplicationContext());

            recyclerView.setPadding(recyclerView.getPaddingLeft(), top, recyclerView.getPaddingRight(), bottom);
        }
    }