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Jetpack Compose Academy · Lesson

Single Source of Truth

Avoid duplicated, drifting state.

One Place for Each Fact

A single source of truth means every piece of state lives in exactly one spot. Everything else reads from it, never copies it.

The Danger of Duplicates

If two Composables each hold their own copy of the same value, they can drift apart. One updates, the other shows stale data. 😬

All lessons in this course

  1. Stateful vs Stateless Composables
  2. Hoist State with value & onValueChange
  3. Single Source of Truth
  4. Compose State Slots & Content Lambdas
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