How can I append text and an output to a button?-CodePudding

I have a program that I'm writing to scan barcodes.

Right now, I can get the output from the reader to show up in the button. This is what the code looks like:

decodeCallback = DecodeCallback {
            runOnUiThread {
                binding.button.text= it.text
            }
        }

What I want it to say though is this:

"Search For:

foo"

All inside the button.

I am really new to kotlin so I'm struggling with this one.

CodePudding user response：

I don't think you need runOnUiThread because callbacks typically are automatically called on the UI thread already.

You can use a String template to fill a term into a String:

decodeCallback = DecodeCallback {
    binding.button.text= "Search For: ${it.text}"
}

If you're on Android, you should use String resources so your user-facing strings are all defined in one place and you can do translations later easily. In your resources you would have something like this, where you use a Java format string.

<string name="searchButtonLabel">Search For: %s</string>

And then use

decodeCallback = DecodeCallback {
    binding.button.text = getString(R.string.searchButtonLabel, it.text)
}

If this is in a Fragment, you'd use requireContext().getString(.