android - 在撰写中禁用横向模式

Question

如何禁用可组合功能的横向模式？我想始终以纵向模式显示可组合。
PS:无法在 Activity 的 list 文件中设置它，因为我希望这种行为仅适​​用于一个可组合的而不是 Activity 中的其他人。

Answer 1

您可以使用 DisposableEffect + Activity requestedOrientation .

@Composable
fun LockScreenOrientation(orientation: Int) {
    val context = LocalContext.current
    DisposableEffect(Unit) {
        val activity = context.findActivity() ?: return@DisposableEffect onDispose {}
        val originalOrientation = activity.requestedOrientation
        activity.requestedOrientation = orientation
        onDispose {
            // restore original orientation when view disappears
            activity.requestedOrientation = originalOrientation
        }
    }
}

fun Context.findActivity(): Activity? = when (this) {
    is Activity -> this
    is ContextWrapper -> baseContext.findActivity()
    else -> null
}

用法:

@Composable
fun Screen() {
    LockScreenOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)
}