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Jetpack Compose Academy · Lesson

Inline Validation & Error States

Give instant feedback on bad input.

Catch Mistakes Early

Great forms fix problems as the user types, not after they tap submit. Inline validation means instant, gentle feedback. ✅

Compute Validity from State

Derive an isError flag straight from the current value. When the email looks wrong, the flag turns true.

val isError = email.isNotEmpty() && !email.contains("@")

All lessons in this course

  1. TextField & OutlinedTextField
  2. Labels, Placeholders & Leading Icons
  3. Keyboard Types & IME Actions
  4. Inline Validation & Error States
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