Android Kotlin Base64 Encode/Decode

Simple app to encode/decode string to/from base64

Top multi line edit text for text, bottom multi line edit text for base 64. Clicking [Encode] will take input from top edit text and output at bottom edit text. Clicking [Decode] will take input from bottom edit text and output at the top edit text.

btnEncode?.setOnClickListener {
    val input = etText?.text.toString()
    val byte = input.toByteArray(charset("UTF-8"))
    val base64 = Base64.getEncoder().encodeToString(byte)
    etBase64?.setText(base64)
}

btnDecode?.setOnClickListener {
    val input = etBase64?.text.toString()
    val byte = Base64.getDecoder().decode(input)
    val text = String(byte, charset("UTF-8"))
    etText?.setText(text)
}

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