JetpackCompose 如何创建Chooser 并监听结果

Question

I want to show a system dialog to user to select from available applications for sharing text from my app. I can do this by using createChooser function from Intent class. But i also want to listen for the system dialog result, so that i can disable/enable my share button to prevent creating multiple system dialogs overlapping each other.

To do this i need to know whenever the dialog is dismissed or an app option is selected by the user. So i need the result of the chooser Dialog i have created.

I was able to get the selected app, but was not able to listen the dismiss event for the system dialog because Intent.ACTION_CLOSE_SYSTEM_DIALOGS event is deprecated for third party applications. So is there any other way on how to know when the system dialog is closed?

Thanks in advance.

Answer 1

I was able to listen the result using rememberLauncherForActivityResult Composable function by combining it with ActivityResultContracts.StartActivityForResult abstract class. you can see the usage example i have implemented below. Please share your opinions/corrections or alternatives for my problem.

var shareEnabled by remember { mutableStateOf(true) }
val launcher = rememberLauncherForActivityResult(ActivityResultContracts.StartActivityForResult()) {
        // you can use the ActivityResult(it) here
        shareEnabled = true
    }
Button(
    onClick = {
        shareEnabled = false
        launcher.launch(getShareText().shareExternal())
    },
    enabled = shareEnabled
)

shareExternal is an extension function that creates and returns the chooser Intent;

fun String.shareExternal(): Intent {
    val dataToShare = this
    val sendIntent: Intent = Intent().apply {
        action = Intent.ACTION_SEND
        putExtra(Intent.EXTRA_TEXT, dataToShare)
        type = "text/plain"
    }
    return Intent.createChooser(sendIntent, null)
}