'Button for backspace for calculator in Android

I'm developing a calculator in which I want to add a backspace button. On clicking on backspace button elements of EditText will be delete one-by-one. But I'm not getting how to write the code for this. Please suggest a solution?

android calculator

Solution 1:^[1]

Something like this should work:

EditText edit;

...

String txt = edit.getText();
txt = txt.length() > 1 ? txt.substring(0, txt.length() - 2) : "0";
edit.setText(txt);

Solution 2:^[2]

binding.idImageViewBackSpace.setOnClickListener {
        val CursorPos = binding.InputTextView.selectionStart
        val length = binding.InputTextView.text.length

        if (CursorPos != 0 && length != 0) {
            val selection: Editable? = binding.InputTextView.text
            selection?.replace(CursorPos - 1, CursorPos, "")
            binding.InputTextView.text = selection
            binding.InputTextView.setSelection(CursorPos - 1)
        }
    }

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Aleks G
Solution 2	Abhinav Dwivedi

'Button for backspace for calculator in Android

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]