Android dev

ForumMate: My return to Android app development

I worked as an Android developer just over two years ago, creating native apps for clients using Java and Kotlin. During that time, Kotlin was gaining prominence and had just been made official by Google. Google also introduced Architecture Components that year, later renamed to JetPack. Since then, the Android ecosystem has changed significantly, with Kotlin and JetPack gaining significant maturity and development. Out with Realm, Activities, and Model-View-Presenter (MVP), in with Room, fragment-based architecture, and MVVM. Data-binding and MVVM are pretty awesome and breathe a whole new life into Android app development.

Android: Complete, generic data-binding RecyclerView adapter

Data binding greatly reduces the amount of code you need to connect user-interfaces with ViewModels. It keeps Activity and Fragment code small, and makes it easier to manage lifecycles.

<EditText
    android:id="@+id/username"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:text="@={viewModel.username}"/>

I discovered that there was no attribute to bind the elements in a RecyclerView, due to the fact that a RecyclerView needs an adapter to be able to create element views. It would also be nice to automatically use data binding to create the viewholders. There are a number of guides to do both of these halves, but I now present the code to do the whole.