개인 프로젝트 MetaAsset 에서 진행한 1장을 이곳으로 옮겼습니다

week 1-Jetpack Compose basics/BasicsCodelab/app/src/main/java/com/codelab/basics/MainActivity.kt

@@ -37,6 +37,7 @@ import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
 import androidx.compose.material.Text
+import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.Icons.Filled
 import androidx.compose.material.icons.filled.ExpandLess
 import androidx.compose.material.icons.filled.ExpandMore
@@ -66,7 +67,8 @@ class MainActivity : ComponentActivity() {
 }
 
 @Composable
-private fun MyApp() {
+fun MyApp() {
+
     var shouldShowOnboarding by rememberSaveable { mutableStateOf(true) }
 
     if (shouldShowOnboarding) {
@@ -77,18 +79,18 @@ private fun MyApp() {
 }
 
 @Composable
-private fun OnboardingScreen(onContinueClicked: () -> Unit) {
+fun OnboardingScreen(onContinueClicked: () -> Unit) {
     Surface {
         Column(
             modifier = Modifier.fillMaxSize(),
             verticalArrangement = Arrangement.Center,
             horizontalAlignment = Alignment.CenterHorizontally
-        ) {
+              ) {
             Text("Welcome to the Basics Codelab!")
             Button(
                 modifier = Modifier.padding(vertical = 24.dp),
                 onClick = onContinueClicked
-            ) {
+                  ) {
                 Text("Continue")
             }
         }
@@ -97,6 +99,7 @@ private fun OnboardingScreen(onContinueClicked: () -> Unit) {
 
 @Composable
 private fun Greetings(names: List<String> = List(1000) { "$it" } ) {
+//    val expanded by remember { mutableStateOf(false) }
     LazyColumn(modifier = Modifier.padding(vertical = 4.dp)) {
         items(items = names) { name ->
             Greeting(name = name)
@@ -109,64 +112,70 @@ private fun Greeting(name: String) {
     Card(
         backgroundColor = MaterialTheme.colors.primary,
         modifier = Modifier.padding(vertical = 4.dp, horizontal = 8.dp)
-    ) {
+        ) {
         CardContent(name)
     }
 }
 
 @Composable
 private fun CardContent(name: String) {
     var expanded by remember { mutableStateOf(false) }
-
     Row(
         modifier = Modifier
             .padding(12.dp)
             .animateContentSize(
                 animationSpec = spring(
                     dampingRatio = Spring.DampingRatioMediumBouncy,
                     stiffness = Spring.StiffnessLow
-                )
-            )
-    ) {
+                                      )
+                               )
+       ) {
         Column(
             modifier = Modifier
                 .weight(1f)
                 .padding(12.dp)
-        ) {
+              ) {
             Text(text = "Hello, ")
             Text(
                 text = name,
                 style = MaterialTheme.typography.h4.copy(
                     fontWeight = FontWeight.ExtraBold
+                                                        )
                 )
-            )
             if (expanded) {
                 Text(
                     text = ("Composem ipsum color sit lazy, " +
-                        "padding theme elit, sed do bouncy. ").repeat(4),
-                )
+                            "padding theme elit, sed do bouncy. ").repeat(4),
+                    )
             }
         }
         IconButton(onClick = { expanded = !expanded }) {
             Icon(
-                imageVector = if (expanded) Filled.ExpandLess else Filled.ExpandMore,
+                imageVector = if (expanded) Icons.Filled.ExpandLess else Icons.Filled.ExpandMore,
                 contentDescription = if (expanded) {
                     stringResource(R.string.show_less)
                 } else {
                     stringResource(R.string.show_more)
-                }
-
-            )
+                })
         }
     }
 }
 
+@Preview(showBackground = true, widthDp = 320, heightDp = 320)
+@Composable
+fun OnboardingPreview() {
+    BasicsCodelabTheme {
+        OnboardingScreen(onContinueClicked = {})
+    }
+}
+
+
 @Preview(
     showBackground = true,
     widthDp = 320,
     uiMode = UI_MODE_NIGHT_YES,
     name = "DefaultPreviewDark"
-)
+        )
 @Preview(showBackground = true, widthDp = 320)
 @Composable
 fun DefaultPreview() {
@@ -175,10 +184,3 @@ fun DefaultPreview() {
     }
 }
 
-@Preview(showBackground = true, widthDp = 320, heightDp = 320)
-@Composable
-fun OnboardingPreview() {
-    BasicsCodelabTheme {
-        OnboardingScreen(onContinueClicked = {})
-    }
-}