Information rich pop-ups
A map not only conveys information about our surroundings, but it can also provide deeper information on demand. Pop-up windows are a great way to provide information about features on a map, such as a business, a location, a natural phenomena, or a geopolitical entity.
Tons of samples
The ArcGIS Runtime SDK samples for Android are tools for developers to understand and implement the fundamental ArcGIS Android API and coding practices.
Build apps like this one
The BladeRunner is an Android application for inspecting wind turbines in the field. The application is built with the ArcGIS Runtime SDK for Android. This application was shown in the ESRI Developer Summit 2012 Plenary. Full source is available on Github.