Help Need help in installing SDK packages

[Ranjan Kashyap]

Hi, I am a Android Beginner and learning to build my first app. I have installed Android Studio and created my first Hello world app. When I am doing further changes to the code there are some rendering issues. I looked into SDK manager and installed all packages (Except for Android TV and Android Gear) of latest Android version 6 having api 23. But still I am getting the rendering issues.

Please let me know what are the stable minimum packages that I need to install to make an app for Android mobile and Tablet devices that runs on latest android versions also. Please help!