如何移除Jetpack Compose中Bottom Sheet的底部内边距

Material 2的BottomSheetScaffold默认会给sheetContent添加底部内边距，用来适配系统导航栏（虚拟按键、底部导航栏等），这是组件的默认行为，并非你代码里手动设置的。

你可以通过以下两种方式解决：

1. 直接移除所有底部内边距 #

在BottomSheetScaffold中添加sheetPadding = PaddingValues(0.dp)参数，覆盖默认的内边距设置：

BottomSheetScaffold(
      scaffoldState = scaffoldState,
      modifier = Modifier.fillMaxSize(),
      sheetBackgroundColor = UiColors.MeditationBottomSheetColor,
      sheetContentColor = Color.Black,
      sheetGesturesEnabled = currentBottomSheet == 1,
      sheetPeekHeight = 0.dp,
      sheetShape = ShapeDefaults.Medium,
      sheetPadding = PaddingValues(0.dp), // 新增这一行移除默认内边距
      sheetContent = {
          if (currentBottomSheet == 0) {
              GuidedMeditationStatisticsBottomSheetContent(
                  user = currentUser,
                  totalDurationInMs = currentPosition,
                  onDone = onDone
              )
          } else {
              InstrumentBottomSheet(
                  currentInstrument = currentInstrument,
                  instruments = instruments,
                  currentVolume = currentInstrumentVolume,
                  onVolumeChange = onVolumeChange,
                  onSelectedInstrument = onSelectedInstrument,
                  onCancel = onCancelInstrument
              )
          }
      },
      content = { 
//Content
})

2. 检查子组件是否自带内边距 #

如果添加sheetPadding后问题仍存在，去检查GuidedMeditationStatisticsBottomSheetContent和InstrumentBottomSheet的内部代码，看是否在根布局中设置了底部padding——很多时候额外内边距是子组件自身添加的。

内容的提问来源于stack exchange，提问作者Harsh Vardhan Tewari