Android development starts with the Android SDK (Software Development Kit). While there are many different programming languages and a host of IDEs (Integrated Development Environments) you can ...

You'll also learn about the Android SDK (Software Development Kit and the essential tools that will make app development a smoother process.We’ll walk you through how to design your app’s user ...

Now, in theory, the Android Open Source Project (AOSP) is still free and open source -- but the Android SDK is the de facto tool for developing apps for every flavor of Android.