Since , Google replaced the old "SDK Tools" with Command Line Tools .
These are the components required to build your Android app into an installable APK (Android Package Kit). Android Studio automatically manages the version of Build Tools used by your project. android sdk tools
Use the Command-Line Tools unless you are maintaining a legacy system that specifically requires the old android command. Since , Google replaced the old "SDK Tools"
The system requirements for Android SDK Tools vary depending on the platform: android sdk tools
The Android SDK is modular. You don't usually download one giant file; instead, you manage components via the . These components are divided into several categories: