ConcurrentModificationException building Android XML with data binding

Question

Error:cannot generate view binders java.util.ConcurrentModificationException occurs when trying to set an ObservableBoolean value in XML.

XML:

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Soy Milk"
    android:onClick="@{() -> model.useSoy.set(true)}"
/>

Model:

public ObservableBoolean useSoy = new ObservableBoolean(false);

How can I fix this?

Answer 1

I got it running by calling a seperate setter method.

XML:

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Soy Milk"
    android:onClick="@{() -> model.setUseSoy(true)}"
/>

Model:

public ObservableBoolean useSoy = new ObservableBoolean(false);

public void setUseSoy(Boolean useSoy){
    this.useSoy.set(useSoy)
}