Material3 Jetpack Compose：手动隐键盘后TextField未失焦无法重唤键盘

这是Material3 Jetpack Compose 1.2.0-beta02版本的已知bug，不是你的代码实现问题，不少开发者都碰到过同款情况。以下是几种可行的修复方案：

• 手动管理焦点与键盘状态
  借助FocusRequester、LocalFocusManager和LocalSoftwareKeyboardController，监听键盘可见性变化，在键盘隐藏时主动清除TextField的焦点。示例代码：

  val focusRequester = remember { FocusRequester() }
  val keyboardController = LocalSoftwareKeyboardController.current
  val focusManager = LocalFocusManager.current
  
  TextField(
      value = "",
      onValueChange = {},
      modifier = Modifier.focusRequester(focusRequester)
  )
  
  val windowInsets = LocalWindowInsets.current
  LaunchedEffect(windowInsets.ime.isVisible) {
      if (!windowInsets.ime.isVisible) {
          focusManager.clearFocus()
      }
  }
  

• 升级依赖版本
  该问题在Material3 Jetpack Compose 1.2.0正式版及后续版本中已经被官方修复，直接升级到稳定版本是最省心的解决方式。

• 临时点击触发方案
  给TextField添加点击事件，当它已有焦点但键盘不可见时，手动唤起键盘并重新请求焦点：

  val focusRequester = remember { FocusRequester() }
  val keyboardController = LocalSoftwareKeyboardController.current
  val windowInsets = LocalWindowInsets.current
  
  TextField(
      value = "",
      onValueChange = {},
      modifier = Modifier
          .focusRequester(focusRequester)
          .clickable {
              val hasFocus = LocalFocusManager.current.focusedChild?.focusRequester == focusRequester
              if (hasFocus && !windowInsets.ime.isVisible) {
                  keyboardController?.show()
                  focusRequester.requestFocus()
              }
          }
  )
  

内容的提问来源于stack exchange，提问作者Adria Fernandez