Check out example codes for "To build this project, accept the SDK license agreements and install the missing components using the Android Studio SDK Manager.". It will help you in understanding the concepts better.

Code Example 1

# Android SDK Tools 25.2.3 and lower. Install the latest `platform-tools` for android-25
android update sdk --no-ui --all --filter platform-tools,android-25,extra-android-m2repository

# Android SDK Tools 25.2.3 and higher
sdkmanager --update

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