Today I stumbled about one of these tiny things which — once you uncover them — immensely ease your life.
Consider a String with placeholders stored in your strings.xml:
<string name="some_string">Hello %1$s</string>
Now let's say we want to use that String directly in data binding. Before figuring out the following trick I would fetch the data from the attached ViewModel which would use String.format() to replace the placeholder with e.g. the user name.
Turns out there is a by far easier way to do this directly within the layout:
<TextView
...
android:text="@{@string/some_string(user.name)}"/>
Isn't that neat?