如何在填充 editText 条目之前禁用按钮?

How to disable a button until editText entries are filled?

以下是我根据 editText 条目禁用和启用按钮的代码。这里没有错误,但是我的应用程序一直在崩溃。任何人都可以在这里帮助我..!

editTextNumberDecimal2.addTextChangedListener (object : TextWatcher1 {

    override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
        TODO("Not yet implemented")

        button2.isEnabled = false
    }

    override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
         TODO("Not yet implemented")

         button2.isEnabled = s.toString().trim().isNotEmpty()
    }

    override fun afterTextChanged(s: Editable?) {
        TODO("Not yet implemented")

    }
})

只需删除这些行:

TODO("Not yet implemented")