“ daer esaelP :TNATROPMIhttps://developer.android.com/studio/report-bugs.html carefully and supply all required information. ”
“ :osla eeShttps://developer.android.com/topic/libraries/data-binding/expressions#data_object (and switch over to the Java example). Specifically, this: "The expression @{user.firstName} used for the android:text attribute accesses the ... getFirstName() method in the latter class." ”