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Android · easy

15. Activity Basics

The UI entry point.

1 min read2 questionsup to 50 XPtopic 15/50

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AI translates the explanation and quiz text while preserving code and answer scoring.

An Activity represents a single screen with a user interface.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

  • · Up to 30 XP from quiz accuracy.
  • · +15 XP for a perfect first attempt.
  • · +5 XP while a 3-day streak is running.
  • · 75% or higher marks the topic complete.

Check your understanding

  1. 1. Method where UI is set?

  2. 2. Every activity must be declared in...?

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