Setting Up Android Studio

Linux:

• Install Java
• Install the ppa package

sudo add-apt-repository ppa:paolorotolo/android-studio
sudo apt-get update
sudo add-apt-repository ppa:paolorotolo/android-studio
sudo apt-get install android-studio

• After the initial installation and from then on update AS using the AS menu, not by apt-get update (unless AS menu updating is broken)
• Rest of configs

Everyone else:

1. Download Android Studio.
2. Point it at your Android-SDK if you've already got it (via ADT/AndroidWorks/TADP).
3. Rest of configs

Rest of configs:

1. If you've already got API Level 21, all it should have to do will be the emulator image.
2. Install the NDK, update settings, etc.