It has all the basic requirements already in place to enable an app to interface with the NDK. When using Android Studio 2. Day 2: Drawing a wireframe Now you know what it is you want to create, you should come up with a basic wireframe for the app.
Keep in mind, if you have to use one or more annotation processors that don't support incremental builds, annotation processing won't be incremental. Some of these things you can build yourself using tools like Adobe Illustrator. Make sure to read the official documentation on whether you need to manually enable this behavior.
Reducing image file sizes, without having to perform build-time compression, can speed up your builds, especially if your app uses a lot of image resources. For your "Hello World!
This lets you run Android apps on your computer so that you can test whether your apps are working or not. Look forward to that sense of accomplishment when you finally manage to build your first app, and you can even consider selling your app if you see fit. Or perhaps you need to know how to transition from one activity to the other.