This is an example app which use data binding to illustrate a dynamic and inter-dependent GUI.

• UI elements are hidden/shown dependent on the radio button states
• There is delayed loading of data ("# of logged in users") which illustrate network requests and async UI update

Originally written as support code for the blog post named Android Databinding: Goodbye Presenter, Hello Viewmodel!. See tags mvp and mvvm referred to by that post.

Later expanded upon to include a more complete Databinding example with full two-way databinding of EditText-fields at the two-way-implicit tag, or manual read-back if you prefer that by the two-way-explicit tag.

The final addition is viewmodel retention upon device rotation in later commits of branch two-way, and also experimentation with using the LiveData and ViewModelProviders classes of the Android Architecture Components tool box in the branch androidarch