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Android Studio – Kotlin issue while sum 2 variables

 val btnAdd = findViewById<Button>(R.id.btnAdd)
        val btnSub = findViewById<Button>(R.id.btnSub)
        btnAdd.setOnClickListener {
            val tx1 = findViewById<TextInputEditText>(R.id.tx1).toString().toInt()
            val tx2 = findViewById<TextInputEditText>(R.id.tx2).toString().toInt()

            var result = findViewById<TextView>(R.id.result)

            result.text = (tx1 + tx2).toString()
        }

I want to sum tx1 and tx2
but i get this message
Do not concatenate text displayed with setText. Use resource string with placeholders.
thanks

To find some help here!

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2

Answers


  1. 0

    Get text of EditText before converting it to toString()

     val btnAdd = findViewById<Button>(R.id.btnAdd)
        val btnSub = findViewById<Button>(R.id.btnSub)
        btnAdd.setOnClickListener {
            val tx1 = findViewById<TextInputEditText>(R.id.tx1).text.toString().trim().toInt()
            val tx2 = findViewById<TextInputEditText>(R.id.tx2).text.toString().trim().toInt()

            var result = findViewById<TextView>(R.id.result)

            result.text = (tx1 + tx2).toString()
        }
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  2. 0

    Please, to retrieve the value inside an EditText you need to get the text

    findViewById<TextInputEditText>(R.id.tx1).text.toString().toInt()

    Second, to resolve the warning just use a String res like this:

    <string name="my_string_res">My String with placeholder %d</string>

    and use it in this way:

    val sum = tx1 + tx2
result.text = getString(R.string. my_string_res, sum)
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