takahirom

@Composable
fun Screen() {
    MySwitch()
}

@Composable
fun MySwitch() {
    var checked by remember { mutableStateOf(false) }
    Switch(
        checked = checked,

takahirom

@Composable
fun Screen() {
    var checked by remember { mutableStateOf(false) }
    MySwitch(checked = checked, onCheckChanged = { checked = it })
}

@Composable
fun MySwitch(checked: Boolean, onCheckChanged: (Boolean) -> Unit) {
    Switch(
        checked = checked,

takahirom

@Composable
fun MySwitch() {
    var checked by remember { mutableStateOf(false) }
    Switch(
        checked = checked,
        onCheckedChange = {
            checked = it
        }
    )
}

takahirom

@Composable
fun MySwitch() {
    var checked by remember { mutableStateOf(false) }
    // In the scope of the Composable function, 
    // I'm changing the checked!
    checked = !checked
    Switch(
        checked = checked,
        onCheckedChange = {
            checked = it

takahirom

@Composable
fun MySwitch(initialEnabled: Boolean) {
    var checked by remember { mutableStateOf(initialEnabled) }
    Switch(
        checked = checked,
        onCheckedChange = {
            checked = it
        }
    )
}

takahirom

@Composable
fun MySwitch(initialEnabled: Boolean) {
    val checked = remember { mutableStateOf(initialEnabled) }
    Switch(
        checked = checked.value,
        onCheckedChange = {
            checked.value = it
        }
    )
}

takahirom

@Composable
fun MySwitch() {
   ​val checked = mutableStateOf(false)
   ​println("MySwitch(): $checked")
   ​Switch(
       ​checked = checked.value,
       ​onCheckedChange = {
           ​checked.value = it
       ​}
   ​)

takahirom

@Composable
fun MySwitch() {
   ​// remember{} is used.
   ​var checked = remember { mutableStateOf(false) }
   ​Switch(
       ​checked = checked.value,
       ​onCheckedChange = {
           ​checked.value = it
       ​}
   ​)

takahirom

@Composable
fun MySwitch() {
   ​// remember{} is not used.
   ​var checked = mutableStateOf(false)
   ​Switch(
       ​checked = checked.value,
       ​onCheckedChange = {
           ​checked.value = it
       ​}
   ​)

takahirom

@Composable
fun MySwitch() {
   ​// MutableState
   ​val checked = remember { mutableStateOf(false) }
   ​// ****↓Add****
   ​println("MySwitch(): $checked")
   ​// ****↑Add****
   ​Switch(
       ​checked = checked.value,
       ​onCheckedChange = {