单击jetpack compose中的按钮时如何打开gmail？

Question

我在 android jetpack compose 中有一个简单的按钮，当我单击该按钮时，我想打开 gmail 并将邮件发送到“android@gmail.com”，这可能吗？

@Composable
    fun SimpleButton() {
        Button(onClick = {
            //your onclick code here
        }) {
            Text(text = "Simple Button")
        }
    }

Answer 1

您必须创建一个 Intent，然后用它启动一个 Activity，这与您通常的做法类似。

Compose 中的唯一区别是您获得了Contextwith LocalContext.current。

@Composable
fun SimpleButton() {
    val context = LocalContext.current
    Column {
        Button(onClick = {
            context.sendMail(to = "example@gmail.com", subject = "Some subject")
        }) {
            Text(text = "Send mail")
        }

        Button(onClick = {
            context.dial(phone = "12345678")
        }) {
            Text(text = "Dial number")
        }
    }
}

fun Context.sendMail(to: String, subject: String) {
    try {
        val intent = Intent(Intent.ACTION_SEND)
        intent.type = "vnd.android.cursor.item/email" // or "message/rfc822"
        intent.putExtra(Intent.EXTRA_EMAIL, arrayOf(to))
        intent.putExtra(Intent.EXTRA_SUBJECT, subject)
        startActivity(intent)
    } catch (e: ActivityNotFoundException) {
        // TODO: Handle case where no email app is available
    } catch (t: Throwable) {
        // TODO: Handle potential other type of exceptions
    }
}

fun Context.dial(phone: String) {
    try {
        val intent = Intent(Intent.ACTION_DIAL, Uri.fromParts("tel", phone, null))
        startActivity(intent)
    } catch (t: Throwable) {
        // TODO: Handle potential exceptions
    }
}

有关更多可能性，请参阅此处的答案，但请记住，有些答案已经过时了。