kotlin 非同步執行緒簡單事例，加http請求，非同步執行緒之間的通訊

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首先編輯非同步執行緒方法

/**
 * @param url 請求網址
 * **/
public fun thread(url : String) : Thread{
    val thread = object : Thread(){
        override fun run() {
            super.run()
            var request = URL(url).readText()
            Log.d("---->request",request)

        }
    }
    thread.start()
    return thread
}

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在UI執行緒直接呼叫

thread(url)

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也可以volley 等架包

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與ui執行緒進行資料傳輸handler

var handler = object : Handler() {
    override fun handleMessage(msg: Message) {
        super.handleMessage(msg)
        when(msg.what){
         MESSAGE->main_text!!.text = msg.obj.toString()
        }
    }
}
執行緒寫法

public fun thread(url : String) : Thread{
    val thread = object : Thread(){
        override fun run() {
            super.run()
            var request = URL(url).readText()
            var msg = Message()
            msg.what = MESSAGE
            msg.obj = request
            handler.sendMessage(msg)
        }
    }
    thread.start()
    return thread
}

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