Compose में मटीरियल 2 से मटीरियल 3 पर माइग्रेट करना

implementation "androidx.compose.material:material:$m2-version" 

implementation "androidx.compose.material3:material3:$m3-version" 

import androidx.compose.material.MaterialTheme  MaterialTheme(     colors = AppColors,     typography = AppTypography,     shapes = AppShapes ) {     // M2 content } 

import androidx.compose.material3.MaterialTheme  MaterialTheme(     colorScheme = AppColorScheme,     typography = AppTypography,     shapes = AppShapes ) {     // M3 content } 

import androidx.compose.material.lightColors import androidx.compose.material.darkColors  val AppLightColors = lightColors(     // M2 light Color parameters ) val AppDarkColors = darkColors(     // M2 dark Color parameters ) val AppColors = if (darkTheme) {     AppDarkColors } else {     AppLightColors } 

import androidx.compose.material3.lightColorScheme import androidx.compose.material3.darkColorScheme  val AppLightColorScheme = lightColorScheme(     // M3 light Color parameters ) val AppDarkColorScheme = darkColorScheme(     // M3 dark Color parameters ) val AppColorScheme = if (darkTheme) {     AppDarkColorScheme } else {     AppLightColorScheme } 

import androidx.compose.material.lightColors import androidx.compose.material.darkColors import androidx.compose.material.MaterialTheme  @Composable private fun AppTheme(   darkTheme: Boolean = isSystemInDarkTheme(),   content: @Composable () -> Unit ) {   val colors = if (darkTheme) darkColors(…) else lightColors(…)   MaterialTheme(       colors = colors,       content = content   ) }  @Composable fun AppComposable() {     AppTheme {         val cardElevation = if (MaterialTheme.colors.isLight) 0.dp else 4.dp         …     } } 

import androidx.compose.material3.lightColorScheme import androidx.compose.material3.darkColorScheme import androidx.compose.material3.MaterialTheme  val LocalCardElevation = staticCompositionLocalOf { Dp.Unspecified } @Composable private fun AppTheme(    darkTheme: Boolean = isSystemInDarkTheme(),     content: @Composable () -> Unit ) {    val cardElevation = if (darkTheme) 4.dp else 0.dp     CompositionLocalProvider(LocalCardElevation provides cardElevation) {         val colorScheme = if (darkTheme) darkColorScheme(…) else lightColorScheme(…)         MaterialTheme(             colorScheme = colorScheme,             content = content         )     } }  @Composable fun AppComposable() {     AppTheme {         val cardElevation = LocalCardElevation.current         …     } } 

import androidx.compose.material.Typography  val AppTypography = Typography(     // M2 TextStyle parameters ) 

import androidx.compose.material3.Typography  val AppTypography = Typography(     // M3 TextStyle parameters ) 

import androidx.compose.material.Shapes  val AppShapes = Shapes(     // M2 Shape parameters ) 

import androidx.compose.material3.Shapes  val AppShapes = Shapes(     // M3 Shape parameters ) 

import androidx.compose.material.Scaffold  Scaffold(     // M2 scaffold parameters ) 

import androidx.compose.material3.Scaffold  Scaffold(     // M3 scaffold parameters ) 

import androidx.compose.material.Scaffold  Scaffold(     backgroundColor = …,     content = { … } ) 

import androidx.compose.material3.Scaffold  Scaffold(     containerColor = …,     content = { … } ) 

import androidx.compose.material.Scaffold import androidx.compose.material.rememberScaffoldState  val scaffoldState = rememberScaffoldState() val scope = rememberCoroutineScope()  Scaffold(     scaffoldState = scaffoldState,     content = {         …         scope.launch {             scaffoldState.snackbarHostState.showSnackbar(…)         }     } ) 

import androidx.compose.material3.Scaffold import androidx.compose.material3.SnackbarHost import androidx.compose.material3.SnackbarHostState  val snackbarHostState = remember { SnackbarHostState() } val scope = rememberCoroutineScope()  Scaffold(     snackbarHost = { SnackbarHost(snackbarHostState) },     content = {         …         scope.launch {             snackbarHostState.showSnackbar(…)         }     } ) 

import androidx.compose.material.DrawerValue import import androidx.compose.material.Scaffold import androidx.compose.material.rememberDrawerState import androidx.compose.material.rememberScaffoldState  val scaffoldState = rememberScaffoldState(     drawerState = rememberDrawerState(DrawerValue.Closed) ) val scope = rememberCoroutineScope()  Scaffold(     scaffoldState = scaffoldState,     drawerContent = { … },     drawerGesturesEnabled = …,     drawerShape = …,     drawerElevation = …,     drawerBackgroundColor = …,     drawerContentColor = …,     drawerScrimColor = …,     content = {         …         scope.launch {             scaffoldState.drawerState.open()         }     } ) 

import androidx.compose.material3.DrawerValue import androidx.compose.material3.ModalDrawerSheet import androidx.compose.material3.ModalNavigationDrawer import androidx.compose.material3.Scaffold import androidx.compose.material3.rememberDrawerState  val drawerState = rememberDrawerState(DrawerValue.Closed) val scope = rememberCoroutineScope()  ModalNavigationDrawer(     drawerState = drawerState,     drawerContent = {         ModalDrawerSheet(             drawerShape = …,             drawerTonalElevation = …,             drawerContainerColor = …,             drawerContentColor = …,             content = { … }         )     },     gesturesEnabled = …,     scrimColor = …,     content = {         Scaffold(             content = {                 …                 scope.launch {                     drawerState.open()                 }             }         )     } ) 

import androidx.compose.material.TopAppBar  TopAppBar(…) 

import androidx.compose.material3.TopAppBar  TopAppBar(…) 

import androidx.compose.material.AppBarDefaults import androidx.compose.material.Scaffold import androidx.compose.material.TopAppBar  val state = rememberLazyListState() val isAtTop by remember {     derivedStateOf {         state.firstVisibleItemIndex == 0 && state.firstVisibleItemScrollOffset == 0     } }  Scaffold(     topBar = {         TopAppBar(             elevation = if (isAtTop) {                 0.dp             } else {                 AppBarDefaults.TopAppBarElevation             },             …         )     },     content = {         LazyColumn(state = state) { … }     } )  

import androidx.compose.material3.Scaffold import androidx.compose.material3.TopAppBar import androidx.compose.material3.TopAppBarDefaults  val scrollBehavior = TopAppBarDefaults.pinnedScrollBehavior()  Scaffold(     modifier = Modifier.nestedScroll(scrollBehavior.nestedScrollConnection),     topBar = {         TopAppBar(             scrollBehavior = scrollBehavior,             …         )     },     content = {         LazyColumn { … }     } )  

import androidx.compose.material.BottomNavigation import androidx.compose.material.BottomNavigationItem  BottomNavigation {     BottomNavigationItem(…)     BottomNavigationItem(…)     BottomNavigationItem(…) }  

import androidx.compose.material3.NavigationBar import androidx.compose.material3.NavigationBarItem  NavigationBar {     NavigationBarItem(…)     NavigationBarItem(…)     NavigationBarItem(…) }  

import androidx.compose.material.Button import androidx.compose.material.ExtendedFloatingActionButton import androidx.compose.material.FloatingActionButton import androidx.compose.material.IconButton import androidx.compose.material.IconToggleButton import androidx.compose.material.OutlinedButton import androidx.compose.material.TextButton  // M2 buttons Button(…) OutlinedButton(…) TextButton(…) // M2 icon buttons IconButton(…) IconToggleButton(…) // M2 FABs FloatingActionButton(…) ExtendedFloatingActionButton(…) 

import androidx.compose.material3.Button import androidx.compose.material3.ExtendedFloatingActionButton import androidx.compose.material3.FloatingActionButton import androidx.compose.material3.IconButton import androidx.compose.material3.IconToggleButton import androidx.compose.material3.OutlinedButton import androidx.compose.material3.TextButton  // M3 buttons Button(…) OutlinedButton(…) TextButton(…) // M3 icon buttons IconButton(…) IconToggleButton(…) // M3 FABs FloatingActionButton(…) ExtendedFloatingActionButton(…) 

import androidx.compose.material.Switch  Switch(…) 

import androidx.compose.material3.Switch  Switch(…) 

import androidx.compose.material.Surface  Surface(     elevation = … ) { … } 

import androidx.compose.material3.Surface  Surface(     shadowElevation = …,     tonalElevation = … ) { … } 

import androidx.compose.material.ContentAlpha import androidx.compose.material.LocalContentAlpha  // High emphasis CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.high) {     Icon(…) } // Medium emphasis CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.medium) {     Icon(…) } // Disabled emphasis CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.disabled) {     Icon(…) } 

import androidx.compose.material3.LocalContentColor  // High emphasis CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onSurface) {     Icon(…) } // Medium emphasis CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onSurfaceVariant) {     Icon(…) } // Disabled emphasis CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onSurface.copy(alpha = 0.38f)) {     Icon(…) } 

import androidx.compose.material.ContentAlpha import androidx.compose.material.LocalContentAlpha  // High emphasis CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.high) {     Text(…) } // Medium emphasis CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.medium) {     Text(…) } // Disabled emphasis CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.disabled) {     Text(…) } 

import androidx.compose.material3.LocalContentColor  // High emphasis Text(     …,     fontWeight = FontWeight.Bold ) // Medium emphasis Text(     …,     fontWeight = FontWeight.Normal ) // Disabled emphasis CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onSurface.copy(alpha = 0.38f)) {     Text(         …,         fontWeight = FontWeight.Normal     ) } 

Badge(     backgroundColor = MaterialTheme.colors.primary ) { … } 

Badge(     containerColor = MaterialTheme.colorScheme.primary ) { … }