Android Databinding: “Method references using '.' is deprecated”

Question

When using databinding in my app, I get the following warning when compiling:

Warning:Method references using \'.\' is deprecated. Instead of \'handler.onItemClick

Answer 1

You can still use JavaVersion.VERSION_1_8. Just use app:onClick, and define a BindingAdapter like this:

@BindingAdapter("onClick") 
public static void bindOnClick(View view, final Runnable runnable) {
    view.setOnClickListener(v -> runnable.run());
}

Then you can use app:onClick="@{handler::onItemClick}" without warnings or errors.