@Override
            public boolean onLongClick(View view) {
                return showCheatSheet(view, view.getContext().getString(textResId));
            }
Sets up a cheat sheet (tooltip) for the given view by setting its {@link
android.view.View.OnLongClickListener}. When the view is long-pressed, a {@link Toast} with
the given text will be shown either above (default) or below the view (if there isn't room
above it).

@param view      The view to add a cheat sheet for.
@param textResId The string resource containing the text to show on long-press.
library/src/main/java/com/heinrichreimersoftware/materialintro/util/CheatSheet.java