在呼叫仍处于活动状态时如何隐藏拨号器意图

Question

I've the below code that launch the Dialer intent, and make a call with the given number.

I need to minimize/hide this activity, so I'm making a delay of 15 seconds that call the Press home intent but t is not working. How can I hide the dialer while it still active (ie still making the required call)!

if (isChecked) {
    val dial = "tel:12345678"
    val phoneIntent = Intent(Intent.ACTION_CALL, Uri.parse(dial))

    val startMain = Intent(Intent.ACTION_MAIN).apply {
        addCategory(Intent.CATEGORY_HOME)
        flags = Intent.FLAG_ACTIVITY_NEW_TASK
    }

    val r = java.lang.Runnable {
            context.startActivity(startMain)
        }

    context.startActivity(phoneIntent)
    val h = Handler()
    h.postDelayed(r, 15000) // will be delayed for 15 seconds
}

Answer 1

I managed it using the below code, but not clear wha is the different between this and the above one in the question:

Thread().run {
    context.startActivity(phoneIntent)
    Thread.sleep(2000)
    context.startActivity(startMain)
}