android app error handling

Transcript

1. !LHNZTIJO ΤϥʔϋϯυϦϯά

2. ࣗݾ঺հ

3. ࣗݾ঺հ w ఝٶͰ͢
   w ߹ಉձࣾ%..DPN
   $50ࣨॴଐ
   

4. ͜͏͍͏͜ͱ͋Γ·ͤΜ͔ʁ

5. w ѲΓ௵͢ͳͬͯݴΘΕͯΔ͚Ͳɺ͡Ό͊Ͳ͏͢Ε͹͍͍ͷʁͬͯࢥͬͯΔਓɺ ࣮͸݁ߏ͍ΔΜ͡Όͳ͍ΜͰ͔͢ʁ

6. w ѲΓ௵͢ͳͬͯݴΘΕͯΔ͚Ͳɺ͡Ό͊Ͳ͏͢Ε͹͍͍ͷʁͬͯࢥͬͯΔਓɺ ࣮͸݁ߏ͍ΔΜ͡Όͳ͍ΜͰ͔͢ʁ
   w ద౰ʹ΍Δͱɺ$SBTI
   'SFF
   ཰͕ͱΜͰ΋ͳ͍͜ͱʹʜ

7. ߟ͑Δ΂͖͜ͱ

8. ߟ͑Δ΂͖͜ͱ w ·ͣ͸ચ͍ग़ͦ͏
   w ΧςΰϥΠζ͠·͠ΐ͏
   w ॲཧͷ࢓ํΛચ͍ग़͠·͠ΐ͏
   w ΧςΰϥΠζͨ͠ΤϥʔͱॲཧΛϚοϐϯά͠·͠ΐ͏
   w

   ϢʔβϏϦςΟ΋ߟ͑Α͏

9. ·ͣ͸ચ͍ग़ͦ͏ Πϯϑϥ૚ ϓϨθϯςʔγϣϯ૚ "DUJWJUZ
   
   'SBHNFOU 7JFX.PEFM 3FQPTJUPSZ "1*
   $MJFOU %# Ϣʔεέʔε૚ 6TF$BTF

   υϝΠϯ૚ ϞσϦϯάͨ͠Ϋϥε܈

10. ·ͣ͸ચ͍ग़ͦ͏ Πϯϑϥ૚ ϓϨθϯςʔγϣϯ૚ "DUJWJUZ
    
    'SBHNFOU 7JFX.PEFM 3FQPTJUPSZ "1*
    $MJFOU %# Ϣʔεέʔε૚ 6TF$BTF

    υϝΠϯ૚ ϞσϦϯάͨ͠Ϋϥε܈ ೝূܥͷΤϥʔ αʔϏεܥͷΤϥʔ %#ʹؔ͢ΔΤϥʔ ঢ়ଶҟৗͳͲͷΤϥʔ ঢ়ଶҟৗͳͲͷΤϥʔ "OESPJEʹؔ͢ΔΤϥʔ ௨৴ෆೳܥͷΤϥʔ

11. Πϯϑϥ૚ ϓϨθϯςʔγϣϯ૚ "DUJWJUZ
    
    'SBHNFOU 7JFX.PEFM 3FQPTJUPSZ "1*
    $MJFOU %# Ϣʔεέʔε૚ 6TF$BTF υϝΠϯ૚

    ϞσϦϯάͨ͠Ϋϥε܈ ೝূܥͷΤϥʔ αʔϏεܥͷΤϥʔ %#ʹؔ͢ΔΤϥʔ ঢ়ଶҟৗͳͲͷΤϥʔ ঢ়ଶҟৗͳͲͷΤϥʔ "OESPJEʹؔ͢ΔΤϥʔ ௨৴ෆೳܥͷΤϥʔ ΧςΰϥΠζ͠Α͏ w αʔϏεʹؔΘΔΤϥʔ
    w ೝূΤϥʔ
    w αʔϏεಠࣗͷΤϥʔ
    w αʔϏεʹΑΒͳ͍Τϥʔ
    w ௨৴Τϥʔ
    w %#઀ଓෆྑΤϥʔ
    w "OESPJEʹؔ͢ΔΤϥʔ

12. Τϥʔͷॲཧͷ࢓ํΛߟ͑Δ w ݸผॲཧʢͦͷը໘Ͱ͔͠ൃੜ͠ͳ͍Τϥʔͷॲཧͷ࢓ํʣ
    w ڞ௨ॲཧʢͲͷը໘Ͱ΋ى͖ΔΤϥʔͷॲཧͷ࢓ํʣ
    w μΠΞϩά
    w εφοΫόʔ
    w

    ڧ੍ը໘ભҠʢϩάΠϯը໘΍ϝϯςφϯεը໘ʹඈ͹͢ͳͲʣ
    w $SBTIMZUJDTʹUISPXBCMFΛͱΓ͋͑ͣ౤͓͛ͯ͘
    w ॲཧ͠ͳ͍ʢͦͷ··$SBTIͤ͞Δʣ

13. ϓϨθϯςʔγϣϯ૚ "DUJWJUZ
    
    'SBHNFOU 7JFX.PEFM Ϣʔεέʔε૚ 6TF$BTF υϝΠϯ૚ ϞσϦϯάͨ͠Ϋϥε܈ ঢ়ଶҟৗͳͲͷΤϥʔ ঢ়ଶҟৗͳͲͷΤϥʔ "OESPJEʹؔ͢ΔΤϥʔ

    $BUDI͢Δ͠ͳ͍ͷڥքઢΛܾΊΔ ঢ়ଶҟৗͳͲͷΤϥʔ DBUDI͢Δ DBUDI͠ͳ͍ ࢲͷ৔߹͸
    "OESPJEʹؔ͢ΔΤϥʔ͸
    DBUDI͠ͳ͍ɻ

14. ΧςΰϥΠζͨ͠ΤϥʔͱॲཧΛϚοϐϯά͢Δ ೝূΤϥʔ ະ஌ͷΤϥʔ ঢ়ଶҟৗܥΤϥʔ ௨৴Τϥʔ %#઀ଓෆྑΤϥʔ ϩάΠϯը໘ʹભҠ ϝϯςφϯεը໘ʹભҠ ϝϯςφϯε μΠΞϩάදࣔ

    4OBDLCBSදࣔ $SBTIMJUZDTʹ౤͛Δ

15. ϢʔβʔϏϦςΟ΋ߟ͑Δ w ྫ͑͹ϚϧνϞδϡʔϧΛ࠾ ༻͍ͯ͠ΔϓϩδΣΫτͰɺ .BJOʹͳΔΑ͏ͳը໘͕࣍ͷ Α͏ʹෳ਺ͷ'SBHNFOUΛΞλ ον͍ͯ͠Δ࣌ "Ϟδϡʔϧͷ
    "'SBHNFOU #Ϟδϡʔϧͷ
    #'SBHNFOU $Ϟδϡʔϧͷ
    $'SBHNFOU

16. ϢʔβʔϏϦςΟ΋ߟ͑Δ w ͜ͷ࣌ʹ௨৴ෆྑͰશͯͷ௨ ৴͕ࣦഊͨ͠ͱ͢Δ
    w ࣍ͷμΠΞϩά͕Ξλονͯ͠ ͍ΔμΠΞϩάͷ਺͚ͩͰΔ ͷ͸๷͍͗ͨ "Ϟδϡʔϧͷ
    "'SBHNFOU #Ϟδϡʔϧͷ
    #'SBHNFOU

    $Ϟδϡʔϧͷ
    $'SBHNFOU ௨৴Τϥʔ͕ൃੜ͠·ͨ͠ɻ
    ࣌ؒΛ͓͍͓ͯࢼ͍ͩ͘͠͞ɻ ௨৴Τϥʔ͕ൃੜ͠·ͨ͠ɻ
    ࣌ؒΛ͓͍͓ͯࢼ͍ͩ͘͠͞ɻ ௨৴Τϥʔ͕ൃੜ͠·ͨ͠ɻ
    ࣌ؒΛ͓͍͓ͯࢼ͍ͩ͘͠͞ɻ

17. ίʔυྫ

18. ΤϥʔΛΩϟονͯ͠-JWF%BUBʹ٧ΊΔ class UserViewModel : ViewModel() { … private val _error

    = MutableLiveData<Throwable>() val error: LiveData<Throwable> = _error fun onCreateView() = viewModelScope.launch { try { _user.value = useCase.execute() } catch (t: Throwable) { _error.value = t } } }

19. ΤϥʔΛॲཧ͢Δ class UserFragment : Fragment() { … override fun onViewCreated(view:

    View, savedInstanceState: Bundle?) { … viewModel.error.observe(viewLifecycleOwner) { if (it is NotFoundUserException) { showNotFound() return@observe } errorHandler.handle( requireContext(), view.rootView, it ) } } private fun showNotFound() { … } }

20. ΤϥʔΛॲཧ͢Δʢݸผͷ৔߹͸ݸผʹʣ class UserFragment : Fragment() { … override fun onViewCreated(view:

    View, savedInstanceState: Bundle?) { … viewModel.error.observe(viewLifecycleOwner) { if (it is NotFoundUserException) { showNotFound() return@observe } errorHandler.handle( requireContext(), view.rootView, it ) } } private fun showNotFound() { … } }

21. ΤϥʔΛॲཧ͢Δʢڞ௨ͷ৔߹͸Τϥʔϋϯυϥʔʹʣ class UserFragment : Fragment() { … override fun onViewCreated(view:

    View, savedInstanceState: Bundle?) { … viewModel.error.observe(viewLifecycleOwner) { if (it is NotFoundUserException) { showNotFound() return@observe } errorHandler.handle( requireContext(), view.rootView, it ) } } private fun showNotFound() { … } }

22. &SSPS
    )BOEMFS class ErrorHandler { private val queue = LinkedList<ErrorRunnable>() private

    val handler = Handler(Looper.getMainLooper()) fun handle( context: Context, view: View, throwable: Throwable ) { val runnable = ErrorRunnable( Error.convert(context, view, throwable) ) if (queue.none { it.error == runnable.error }) { queue.add(runnable) handler.post(runnable) } } inner class ErrorRunnable(val error: Error) : Runnable { override fun run() { error.handle() val running = this handler.postDelayed({ queue.remove(running) }, 200) } } }

23. &SSPS
    )BOEMFS class ErrorHandler { private val queue = LinkedList<ErrorRunnable>() private

    val handler = Handler(Looper.getMainLooper()) fun handle( context: Context, view: View, throwable: Throwable ) { val runnable = ErrorRunnable( Error.convert(context, view, throwable) ) if (queue.none { it.error == runnable.error }) { queue.add(runnable) handler.post(runnable) } } inner class ErrorRunnable(val error: Error) : Runnable { override fun run() { error.handle() val running = this handler.postDelayed({ queue.remove(running) }, 200) } } } 5ISPXBCMF
    
    &SSPS

24. &SSPS
    )BOEMFS class ErrorHandler { private val queue = LinkedList<ErrorRunnable>() private

    val handler = Handler(Looper.getMainLooper()) fun handle( context: Context, view: View, throwable: Throwable ) { val runnable = ErrorRunnable( Error.convert(context, view, throwable) ) if (queue.none { it.error == runnable.error }) { queue.add(runnable) handler.post(runnable) } } inner class ErrorRunnable(val error: Error) : Runnable { override fun run() { error.handle() val running = this handler.postDelayed({ queue.remove(running) }, 200) } } }

25. &SSPS
    )BOEMFS class ErrorHandler { private val queue = LinkedList<ErrorRunnable>() private

    val handler = Handler(Looper.getMainLooper()) fun handle( context: Context, view: View, throwable: Throwable ) { val runnable = ErrorRunnable( Error.convert(context, view, throwable) ) if (queue.none { it.error == runnable.error }) { queue.add(runnable) handler.post(runnable) } } inner class ErrorRunnable(val error: Error) : Runnable { override fun run() { error.handle() val running = this handler.postDelayed({ queue.remove(running) }, 200) } } }

26. &SSPS sealed class Error { abstract fun handle() class MaintenanceError(

    private val context: Context ) : Error() { override fun handle() { context.startActivity( MaintenanceActivity.createIntent(context).apply { addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK) } ) } override fun equals(other: Any?): Boolean = other is MaintenanceError override fun hashCode(): Int { return context.hashCode() } } class UnknownError( private val view: View, private val throwable: Throwable ) : Error() { override fun handle() { FirebaseCrashlytics.getInstance().recordException(throwable) Snackbar.make(view, "ෆ໌ͳΤϥʔͰ͢", Snackbar.LENGTH_SHORT).show() } } companion object { fun convert( context: Context, view: View, throwable: Throwable ): Error = when { throwable is HttpException && throwable.code() == 503 -> MaintenanceError(context) else -> UnknownError(view, throwable) } } }

27. &SSPS sealed class Error { abstract fun handle() class MaintenanceError(

    private val context: Context ) : Error() { override fun handle() { context.startActivity( MaintenanceActivity.createIntent(context).apply { addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK) } ) } override fun equals(other: Any?): Boolean = other is MaintenanceError override fun hashCode(): Int { return context.hashCode() } } class UnknownError(…) {…} … }

28. &SSPS sealed class Error { abstract fun handle() class MaintenanceError(

    private val context: Context ) : Error() { override fun handle() { context.startActivity( MaintenanceActivity.createIntent(context).apply { addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK) } ) } override fun equals(other: Any?): Boolean = other is MaintenanceError override fun hashCode(): Int { return context.hashCode() } } class UnknownError(…) {…} … }

29. &SSPS sealed class Error { … companion object { fun

    convert( context: Context, view: View, throwable: Throwable ): Error = when { throwable is HttpException && throwable.code() == 503 -> MaintenanceError(context) … else -> UnknownError(view, throwable) } } }

30. ·ͱΊ

31. ·ͱΊ w ΤϥʔΛચ͍ग़ͯ͠ΧςΰϥΠζ͠Α͏
    w ॲཧͷ࢓ํΛચ͍ग़ͦ͏
    w ΤϥʔͱॲཧΛϚοϐϯά͠Α͏
    w ΞϓϦ͸Ϣʔβʔ͕৮Δ΋ͷͳͷͰɺϢʔβʔϏϦςΟ΋ߟ͑Α͏
    w

    ࣌ʹ͸$SBTIͤ͞Δ΂͖ͱ͍͏൑அ΋͠Α͏