Jetpack Compose Academy · 강의

활성화, 비활성화 및 로딩 상태

버튼에 사용 가능 여부를 반영합니다.

활성화, 비활성화 및 로딩 상태은(는) CoddyKit의 무료 Jetpack Compose Academy 강의입니다. 이것은 4개 중 3번째 강의입니다. 아래에서 전체 강의를 무료로 읽을 수 있으며, 내장 코드 에디터와 24/7 AI 튜터와 함께 브라우저에서 직접 실습할 수 있습니다. 이 강의는 Jetpack Compose Academy 학습 경로의 일부이며, 진행 상황이 웹과 CoddyKit 앱에 동기화됩니다. Jetpack Compose Academy 강의에는 총 4개의 강의가 포함되어 있습니다.

이 강의의 일부는 아직 번역되지 않았으며 영어로 표시됩니다.

Buttons Have Moods

A good button reflects reality: ready, blocked, or working. Compose lets you express these states so users always know what is possible. 🚦

The enabled Parameter

Every button takes an enabled flag. Set it to false and the button greys out and ignores taps automatically.

Button(
    onClick = { submit() },
    enabled = false
) { Text("Submit") }

Drive enabled From State

The real power is binding enabled to state. Tie it to validation so the button only activates when input is ready.

Button(
    onClick = { submit() },
    enabled = name.isNotBlank()
) { Text("Submit") }

Disabled Means Blocked

A disabled button still appears, so users see the action exists. Its faded look signals why not yet without an error message.

Show Progress While Working

For slow actions, show a loading state. Track a boolean and swap the label for a spinner while the work runs.

var loading by remember { mutableStateOf(false) }

Disable During Loading

While loading, set enabled = !loading so users cannot double-tap and fire the same action twice.

Button(
    onClick = { loading = true },
    enabled = !loading
) { Text("Save") }

Swap In a Spinner

Inside the content, branch on the flag: show a small CircularProgressIndicator when loading, the label otherwise.

Button(onClick = { }, enabled = !loading) {
    if (loading) CircularProgressIndicator(Modifier.size(18.dp))
    else Text("Save")
}

Size the Spinner Down

The default spinner is large. Constrain it with a Modifier.size so it fits neatly where the label used to sit.

CircularProgressIndicator(
    modifier = Modifier.size(18.dp),
    strokeWidth = 2.dp
)

Reset When Done

When the work finishes, set loading back to false. The label returns and the button becomes tappable again.

onResult = { loading = false }

States Prevent Mistakes

Together, enabled and loading guard your actions: no taps before input is valid, no duplicate taps while work is in flight.

Communicate, Don't Hide

Prefer disabling over hiding a button. A visible-but-disabled control teaches users the path to unlock it.

Quick Check

Your save action takes two seconds and users keep double-tapping it.

Recap: Stateful Buttons

You learned to reflect reality: enabled gates by validity, a loading flag shows progress and blocks repeats. Honest buttons, happy users. 🎯

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