如何在 AsyncTask 中使用 findViewById 方法？

Question

I have an AsyncTask to execute while trying to connect the phone to a Bluetooth device, I want to change an icon from a button if it connects successfully

(I'm new to Kotlin programming)

I would be very grateful if anyone could help.

Answer 1

将此替换为第 146 行 val blueBtn=this@MainActivity.findViewById(R.id.blue_btn)

Answer 2

I would like to mention, that making changes from the async task is not really a best solution, since they are designed to handle only background jobs, so I would recommend sending a command from there to handle in the Activity

Still, if you want this, try changing you passed parameter context to be of type Activity , like context: Activity , and access findViewById by context.findViewById(...)

Answer 3

Replace private to inner class.