Ins and Outs of Custom View Development on Android with Ivan Škorić, Android Worldwide

Custom views have always been an important part of the Android ecosystem. The platform itself always strived to provide you with all the components that you need to build apps. As the Android design philosophies changed, the UI components provided by the framework followed. Nevertheless, we still need custom views in a lot of apps. This talk touches on all the areas of custom views development, ranging from "why" to "how". Understanding how to properly create custom UI components also brings you closer to knowing how to use the already provided ones in the best possible way. Some of the areas that we will address:

What are custom views, and why do you need them
How the views are measured and laid out
Views vs. ViewGroups
What are LayoutParams, and when do you need custom ones
Composing views vs. writing them from scratch
How views are connected to the XML and vice-versa
How different is writing views for your app vs. writing a library.

The talk is suited for both beginners and more experienced developers.