Android - Frame layout height not matching with coordinator layout

Question

I have a problem with my FrameLayout (Container in Drawer Layout). The height of the FrameLayout exceeds the screen height (below the android default menu buttons at bottom).

Answer 1

If you use different Fragments inside your CoordinatorLayout you will face the problem, that some Fragments have scrollable content and some should not scroll. Your Toolbar has the scrolling flags "scroll|enterAlways", which is ok for the former layouts, but not ok for the latter. My solution is a custom AppBarLayout.Behavior which switches the scrolling flags dependant on the custom tag (contentShouldNotScrollTag). Set this tag for the layouts, which should not scroll like this:

As the result, the height of this Fragment will not exceed the screen's height. Here is the custom behavior class for the AppBarLayout:

public class MyScrollBehavior extends AppBarLayout.Behavior {
    private View content;

    public MyScrollBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onMeasureChild(CoordinatorLayout parent, AppBarLayout appBarLayout, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed) {
        if(content == null) {
            content = parent.findViewById(R.id.container);
        }

        if(content != null) {
            boolean shouldNotScroll = content.findViewWithTag(parent.getContext().getString(R.string.contentShouldNotScrollTag)) != null;
            Toolbar toolbar = (Toolbar) appBarLayout.findViewById(R.id.toolbar);
            AppBarLayout.LayoutParams params =
                    (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
            if (shouldNotScroll) {
                params.setScrollFlags(0);
                appBarLayout.setExpanded(true, true);
            } else {
                params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL
                        | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS);
            }
        }

        return super.onMeasureChild(parent, appBarLayout, parentWidthMeasureSpec, widthUsed, parentHeightMeasureSpec, heightUsed);
    }
}