java - Android应用程序在最小化然后打开后崩溃

Question

我重新设计了应用程序，没有更改代码，在预样式版本上一切都很好。应用程序在最小化然后打开后崩溃，最初启动时它工作正常，只有在最小化后最大化时才会崩溃。可执行代码是相同的，没有删除课程容器（存在于另一个片段中的一个实例中），并且在 LessonsNewWordsFragment 片段中没有以任何方式涉及。错误：

5138-5138/soylekz.Droid E/AndroidRuntime: FATAL EXCEPTION: main
    Process: soylekz.Droid, PID: 5138
    java.lang.IllegalArgumentException: No view found for id 0x7f0a016f (soylekz.Droid:id/lessonsContainer) for fragment LessonsNewWordsFragment{5f3baba #6 id=0x7f0a016f}
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1454)
        at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
        at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:802)
        at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
        at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
        at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
        at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3273)
        at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3229)
        at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:201)
        at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:620)
        at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:178)
        at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1432)
        at android.app.Activity.performStart(Activity.java:7923)
        at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3359)
        at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
        at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
        at android.app.ClientTransactionHandler.executeTransaction(ClientTransactionHandler.java:57)
        at android.app.ActivityThread.handleRelaunchActivityLocally(ActivityThread.java:5358)
        at android.app.ActivityThread.access$3600(ActivityThread.java:230)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2078)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:224)
        at android.app.ActivityThread.main(ActivityThread.java:7551)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:995)

SDK 已更改为最新版本。调试时，它在重新设计前后的版本上经历相同的行。我不明白可能是什么问题，朝哪个方向移动。

添加：

课程NewWordsFragment.kt

class LessonsNewWordsFragment : BaseFragment<MainActivity, LessonsNewWordsPresenter>(),
    LessonsNewWordsView,
    LessonsSubtasksAdapter.OnItemClickListener {

    lateinit var rvAdapterSubTasks: LessonsSubtasksAdapter

    override val layoutId: Int
        get() = R.layout.fragment_lessons_new_words

    override fun createPresenter(): LessonsNewWordsPresenter = LessonsNewWordsPresenter(this)

    override fun initViews(rootView: View?) {
        val lessonId = arguments?.getInt(ARG_LESSON_ID)!!
        var active_sections_:String = arguments?.getString(ARG_ACTIVE_SECTIONS)!!
        active_sections_ = active_sections_.replace("/", "")
        var active_sections: ActiveSections = Gson().fromJson<ActiveSections>(active_sections_, object : TypeToken<ActiveSections>() {}.type)

        val soundAndTranslationFrag = SoundAndTranslationFragment.newInstance(lessonId)
        val dictionaryCards = LessonCardsFragment.newInstance(lessonId)
        val wordsOnPhoto = LessonPhotosFragment.newInstance(lessonId)
        val exercises = NewWordsExercisesFragment.newInstance(lessonId)

        rvAdapterSubTasks = LessonsSubtasksAdapter()
        rvAdapterSubTasks.onItemClickListener = this
        lessonsNewWordsRv.layoutManager = LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
        lessonsNewWordsRv.adapter = rvAdapterSubTasks

        var arrayList = ArrayList<LessonsSubtasksModel>()
        var isChecked = true;
        if (active_sections.word == 1) {
            arrayList.add(LessonsSubtasksModel(getString(R.string.subtaskTvSoundAndTrans), isChecked, soundAndTranslationFrag))
            isChecked = false
        }
        if (active_sections.card == 1) {
            arrayList.add(LessonsSubtasksModel(getString(R.string.subtaskTvDictionaryCards), isChecked, dictionaryCards))
            isChecked = false
        }
        if (active_sections.photo == 1) {
        arrayList.add(LessonsSubtasksModel(getString(R.string.subtaskTvWordsOnPhoto), isChecked, wordsOnPhoto))
            isChecked = false
        }
        if (active_sections.wordexercise == 1) {
            arrayList.add(LessonsSubtasksModel(getString(R.string.subtaskTvExercisesForMem), isChecked, exercises))
            isChecked = false
        }
        rvAdapterSubTasks.setItems(arrayList)

        replaceFragment(R.id.lessonsNewWordsContainer, rvAdapterSubTasks.getItem(0).fragment, null)
        lessonsNewWordsRv.scrollToPosition(0)
    }

    override fun onItemClick(item: Int?, fragment: BaseFragment<*,*>) {
        rvAdapterSubTasks.notifyDataSetChanged()
        lessonsNewWordsRv.scrollToPosition(item!!)
        replaceFragment(R.id.lessonsNewWordsContainer, fragment, null)
    }

    companion object {
        private const val ARG_LESSON_ID = "arg_lesson_id"
        private const val ARG_ACTIVE_SECTIONS = "arg_active_sections"

        fun newInstance(lessonId: Int, active_sections: String): LessonsNewWordsFragment {
            val args = Bundle()
            val fragment = LessonsNewWordsFragment()
            args.putInt(ARG_LESSON_ID, lessonId)
            args.putString(ARG_ACTIVE_SECTIONS, active_sections)
            fragment.setArguments(args)
            return fragment
        }
    }
}

BaseFragment.kt

abstract class BaseFragment<A : BaseActivity<*>, P : BasePresenter> : Fragment(), BaseView {

    protected var presenter: P? = null

    /**
     * You this instead of [android.app.Fragment.getActivity]
     */
    protected lateinit var activity: A

    private var rootView: View? = null

    /**
     * Place your layout resource as return parameter
     *
     * @return resourceId of layout which designed for current fragment
     */
    @get:LayoutRes
    protected abstract val layoutId: Int

    /**
     * You should create an instance of your presenter here. After that you can use [presenter] everywhere in created fragment
     *
     * @return an instance of presenter for created fragment
     */
    protected abstract fun createPresenter(): P

    /**
     * Initialize all views here.
     * This method do the same as [android.app.Fragment.onCreateView]
     *
     * @param rootView already inflated view
     */
    protected abstract fun initViews(rootView: View?)

    override fun onAttach(context: Context?) {
        super.onAttach(context)
        @Suppress("UNCHECKED_CAST")
        activity = getActivity() as A
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        presenter = createPresenter()
        Utils.changeLang(context!!)
        return inflater?.inflate(layoutId, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) = initViews(view)

    /**
     * Replaces existing fragment with allowing state loss
     *
     * @param containerId view where fragment will be replaced
     * @param fragment    new fragment
     * @param tag         for new fragment
     */
    protected fun replaceFragment(@IdRes containerId: Int, fragment: BaseFragment<*, *>, tag: String?) {
        fragmentManager?.beginTransaction()?.replace(containerId, fragment, tag)?.commitAllowingStateLoss()
    }

    protected fun replaceFragmentChild(@IdRes containerId: Int, fragment: BaseFragment<*, *>, tag: String?) {
        childFragmentManager?.beginTransaction()?.replace(containerId, fragment, tag)?.commitAllowingStateLoss()
    }


    /**
     * Adds fragment into backstack above existing fragment allowing state loss
     *
     * @param containerId view where fragment will be added
     * @param fragment    new fragment
     * @param tag         for new fragment
     */
    protected fun addFragment(@IdRes containerId: Int, fragment: BaseFragment<*, *>, tag: String?) {
        fragmentManager?.beginTransaction()?.replace(containerId, fragment, tag)?.addToBackStack(tag)
                ?.commitAllowingStateLoss()
    }

    protected fun addFragmentChild(@IdRes containerId: Int, fragment: BaseFragment<*, *>, tag: String?) {
        childFragmentManager?.beginTransaction()?.replace(containerId, fragment, tag)?.addToBackStack(tag)
            ?.commitAllowingStateLoss()
    }

    override fun showProgressView() = activity.showProgressView()

    override fun hideProgressView() = activity.hideProgressView()

}

标签： javaandroidkotlincrash