ChapterQuestionFragment.kt

@ExperimentalCoroutinesApi
@AndroidEntryPoint
class ChapterQuestionFragment(private val question: Question) :
    BaseFragment<FragmentChapterQuestionBinding, ChapterQuestionViewModel>(R.layout.fragment_chapter_question) {

    //var region
    override val viewModel: ChapterQuestionViewModel by viewModels()
    private lateinit var mCallback: OnRequestAction
    //end region

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        binding.questionContent = question
        binding.txtQuestion.text= Html.fromHtml(question.question)
        checkAnswerAndShowHint()
    }

    override fun onAttach(context: Context) {
        super.onAttach(context)
        try {
            mCallback = (parentFragment as OnRequestAction?)!!
        } catch (e: ClassCastException) {
            throw ClassCastException(
                context.toString()
                    .toString() + " must implement OnRequestAction"
            )
        }
    }

    private fun checkAnswerAndShowHint() {
        binding.btnCheck.setOnClickListener {
            when (question.correct_answer) {
                binding.rbOption1.text -> {
                    if (binding.rbOption1.isChecked) {
                        mCallback.nextPage()
                    } else {
                        showSnackBar(
                            binding.root,
                            "Your Answer is Wrong or you did not answer the question !!"
                        )
                    }
                }
                binding.rbOption2.text -> {
                    if (binding.rbOption2.isChecked) {
                        showSnackBar(binding.root, "Correct Answer")
                        mCallback.nextPage()
                    } else {
                        showSnackBar(
                            binding.root,
                            "Your Answer is Wrong or you did not answer the question !!"
                        )
                    }
                }
                binding.rbOption3.text -> {
                    if (binding.rbOption3.isChecked) {
                        showSnackBar(binding.root, "Correct Answer")
                        mCallback.nextPage()
                    } else {
                        showSnackBar(
                            binding.root,
                            "Your Answer is Wrong or you did not answer the question !!"
                        )
                    }
                }
                binding.rbOption4.text -> {
                    if (binding.rbOption4.isChecked) {
                        showSnackBar(binding.root, "Correct Answer")
                        mCallback.nextPage()
                    } else {
                        showSnackBar(
                            binding.root,
                            "Your Answer is Wrong or you did not answer the question !!"
                        )
                    }
                }
                else -> {
                    showSnackBar(
                        binding.root,
                        "Your Answer is Wrong or you did not answer the question !!"
                    )
                }

            }

        }
        binding.btnHint.setOnClickListener {
            buildDialog("HINT", question.hint!!)
        }
    }
}