在android kotlin中，使用步进库将自定义单选按钮值传递给多个片段，以便在摘要页面上使用

你好，我希望你们能帮我一把。 我很确定我接近回答，但似乎不能得到正确的答案。

我设置了12个使用stepstone-tech步进库的片段

每个片段减去摘要片段都有它自己的无线电组代表一个问题，每个无线电按钮通过标签分配一个值（需要在摘要片段上计算它的唯一值）。

每个片段被设置为在被允许移动到下一个片段之前需要响应。

所有这一切都运行平稳，我的期望，但我很难搞清楚如何拉标签值，保存它与我的DataManager接口，并获得我的onNextClick函数摘要片段。

PulseFragment

class PulseFragment : Fragment(), BlockingStep { companion object { fun newInstance(): PulseFragment { return PulseFragment() } } @BindView(R.id.pulseGroup) lateinit var pulseGroup: RadioGroup lateinit var dataManager: DataManager override fun onAttach(context: Context?) { super.onAttach(context) if (context is DataManager) { dataManager = context } else { throw IllegalStateException("Activity must implement DataManager interface!") } } override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? { //initialize your UI return inflater!!.inflate(R.layout.fragment_pulse, container, false) } override fun onViewCreated(view: View?, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) val rg1 = view!!.findViewById<View>(R.id.pulseGroup) as RadioGroup rg1.setOnCheckedChangeListener { group, checkedId -> val context = context val thisButton = getView()!!.findViewById<View>(checkedId) as RadioButton val toast = Toast.makeText(context, thisButton.text, Toast.LENGTH_SHORT) toast.show() ButterKnife.bind(this, view) } } override fun onNextClicked(callback: StepperLayout.OnNextClickedCallback) { val selectedRadio = pulseGroup.toString() dataManager.saveData(selectedRadio) callback.goToNextStep() } override fun onCompleteClicked(callback: StepperLayout.OnCompleteClickedCallback) { } override fun onBackClicked(callback: StepperLayout.OnBackClickedCallback) { Toast.makeText(this.getContext(), "You went back a step!", Toast.LENGTH_SHORT).show() callback.goToPrevStep() } override fun verifyStep(): VerificationError? { val rg1 = view!!.findViewById<View>(R.id.pulseGroup) as RadioGroup return if (rg1.getCheckedRadioButtonId() == -1) VerificationError("Please select an answer!") else null } override fun onSelected() { } override fun onError(error: VerificationError) { } val layoutResId: Int get() = R.layout.fragment_pulse } 

StepperAdapter

 class StepperAdapter(fm: FragmentManager, context: Context) : AbstractFragmentStepAdapter(fm, context) { override fun createStep(position: Int): Step? { when (position) { 0 -> { val step1 = PulseFragment() val b1 = Bundle() b1.putInt(CURRENT_STEP_POSITION_KEY, position) step1.arguments = b1 return step1 } 1 -> { val step2 = SweatingFragment() val b2 = Bundle() b2.putInt(CURRENT_STEP_POSITION_KEY, position) step2.arguments = b2 return step2 } 2 -> { val step3 = RestlessnessFragment() val b3 = Bundle() b3.putInt(CURRENT_STEP_POSITION_KEY, position) step3.arguments = b3 return step3 } 3 -> { val step4 = PupilFragment() val b4 = Bundle() b4.putInt(CURRENT_STEP_POSITION_KEY, position) step4.arguments = b4 return step4 } 4 -> { val step5 = BoneFragment() val b5 = Bundle() b5.putInt(CURRENT_STEP_POSITION_KEY, position) step5.arguments = b5 return step5 } 5 -> { val step6 = RunnyFragment() val b6 = Bundle() b6.putInt(CURRENT_STEP_POSITION_KEY, position) step6.arguments = b6 return step6 } 6 -> { val step7 = GiFragment() val b7 = Bundle() b7.putInt(CURRENT_STEP_POSITION_KEY, position) step7.arguments = b7 return step7 } 7 -> { val step8 = TremorFragment() val b8 = Bundle() b8.putInt(CURRENT_STEP_POSITION_KEY, position) step8.arguments = b8 return step8 } 8 -> { val step9 = YawningFragment() val b9 = Bundle() b9.putInt(CURRENT_STEP_POSITION_KEY, position) step9.arguments = b9 return step9 } 9 -> { val step10 = AnxietyFragment() val b10 = Bundle() b10.putInt(CURRENT_STEP_POSITION_KEY, position) step10.arguments = b10 return step10 } 10 -> { val step11 = GoosefleshFragment() val b11 = Bundle() b11.putInt(CURRENT_STEP_POSITION_KEY, position) step11.arguments = b11 return step11 } 11 -> { val step12 = SummaryFragment() val b12 = Bundle() b12.putInt(CURRENT_STEP_POSITION_KEY, position) step12.arguments = b12 return step12 } } return null } override fun getCount(): Int { return 12 } override fun getViewModel(@IntRange(from = 0) position: Int): StepViewModel { val builder = StepViewModel.Builder(context) .setTitle(R.string.tab_title) when (position) { 0 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Cancel") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(StepViewModel.NULL_DRAWABLE) 1 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 2 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 3 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 4 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 5 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 6 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 7 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 8 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 9 -> builder .setEndButtonLabel("This way") .setBackButtonLabel("Go back") .setNextButtonEndDrawableResId(R.drawable.ic_arrow_forward_black_24dp) .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 10 -> builder .setEndButtonLabel(R.string.go_to_summary) .setBackButtonLabel("Go to first") .setBackButtonStartDrawableResId(R.drawable.ic_arrow_back_black_24dp) 11 -> builder .setBackButtonLabel("Go back") .setEndButtonLabel("I'm done!") else -> throw IllegalArgumentException("Unsupported position: " + position) } return builder.create() } companion object { private val CURRENT_STEP_POSITION_KEY = "messageResourceId" } } 

主要活动

 class MainActivity : AppCompatActivity(), StepperLayout.StepperListener { private var mStepperLayout: StepperLayout? = null private var mStepperAdapter: StepperAdapter? = null override fun onCreate(savedInstanceState: Bundle?) { setTheme(R.style.MyMaterialTheme) super.onCreate(savedInstanceState) setContentView(R.layout.test_layout) mStepperLayout = findViewById<View>(R.id.stepperLayout) as StepperLayout mStepperAdapter = StepperAdapter(supportFragmentManager, this) mStepperLayout!!.adapter = mStepperAdapter!! mStepperLayout!!.setListener(this) } override fun onCompleted(completeButton: View) { Toast.makeText(this, "Hope this helped!", Toast.LENGTH_SHORT).show() } override fun onError(verificationError: VerificationError) { Toast.makeText(this, "" + verificationError.errorMessage, Toast.LENGTH_SHORT).show() } override fun onStepSelected(newStepPosition: Int) {} override fun onReturn() { finish() } } 

PassDataBetweenStepsActivity

 class PassDataBetweenStepsActivity : AppCompatActivity(), DataManager { companion object { private const val CURRENT_STEP_POSITION_KEY = "position" private const val DATA = "data" } @BindView(R.id.stepperLayout) lateinit var stepperLayout: StepperLayout private var data: String? = null override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) title = "Stepper sample" setContentView(R.layout.test_layout) ButterKnife.bind(this) val startingStepPosition = savedInstanceState?.getInt(CURRENT_STEP_POSITION_KEY) ?: 0 data = savedInstanceState?.getString(DATA) stepperLayout.setAdapter(PassDataBetweenStepsFragmentStepAdapter(supportFragmentManager, this), startingStepPosition) } override fun onSaveInstanceState(outState: Bundle) { outState.putInt(CURRENT_STEP_POSITION_KEY, stepperLayout.currentStepPosition) outState.putString(DATA, data) super.onSaveInstanceState(outState) } override fun onBackPressed() { val currentStepPosition = stepperLayout.currentStepPosition if (currentStepPosition > 0) { stepperLayout.onBackClicked() } else { finish() } } override fun saveData(data: String?) { this.data = data } override fun getData(): String? { return data } } 

DataManager的

 interface DataManager { fun saveData(data: String?) fun getData(): String? }