如何移除带圆角边框的OutlinedTextField的角落白色背景？

我正在尝试创建一个带圆角的OutlinedTextField，但背景仍能看到方形的白色区域，如何移除这个白色背景？

以下是我的可组合函数：

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun EmailEntry(
    modifier: Modifier = Modifier,
    isValidEmail: Boolean,
    onEmailChange: (String) -> Unit
) {
    var emailValue by remember {
        mutableStateOf("")
    }

    OutlinedTextField(
        modifier = modifier.background(
            shape = RoundedCornerShape(10.dp),
            color = MaterialTheme.colorScheme.backgroundInputEntry
        ),
        singleLine = true,
        value = emailValue,
        onValueChange = { newInput ->
            emailValue = newInput
            onEmailChange(newInput)
        },
        placeholder = {
            Text(text = "Email address", color = MaterialTheme.colorScheme.placeholderEntry)
        },
        trailingIcon = {
            if (isValidEmail) {
                Image(
                    painter = painterResource(id = R.drawable.tick),
                    
                    contentDescription = "Valid email tick"
                )
            }
        },
        colors = TextFieldDefaults.outlinedTextFieldColors(
            focusedBorderColor = MaterialTheme.colorScheme.focusedInputEntryBorder,
            unfocusedBorderColor = Color.Transparent),
        shape = RoundedCornerShape(10.dp)
    )
}

预览代码：

@Composable
@Preview(showBackground = true)
fun PreviewEmailEntryValidEmail() {
    Surface {
        EmailEntry(
            isValidEmail = true,
            onEmailChange = { email ->
                Log.d("EMAIL_ENTRY", email)
            }
        )
    }
}

问题出在OutlinedTextField内部默认带有白色容器背景，仅在modifier上设置背景无法覆盖组件本身的容器色。只需在TextFieldDefaults.outlinedTextFieldColors中添加containerColor参数，将其设置为你自定义的背景色即可：

修改后的colors配置：

colors = TextFieldDefaults.outlinedTextFieldColors(
    focusedBorderColor = MaterialTheme.colorScheme.focusedInputEntryBorder,
    unfocusedBorderColor = Color.Transparent,
    containerColor = MaterialTheme.colorScheme.backgroundInputEntry // 添加该行覆盖默认白色背景
),

保留modifier上的background设置可确保圆角裁剪生效，这样就能完全移除方形白色背景，实现带圆角的自定义背景输入框。

内容的提问来源于stack exchange，提问作者ant2009