droidkaigi2016 - Speaker Deck

droidkaigi2016

by funnelbit

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%BHHFSͱ3FBMNΛ ར༻ͨ͠Ϟμϯͳ։ൃ ๺ଜɹྋ

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ࣗݾ঺հ w ๺ଜɹྋ w ͸ͯͳJEGVOOFMCJU w 5XJUUFSJEFYQFSPQFSP

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͸ͯͳϒοΫϚʔΫ

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ژ౎

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ࠓ೔࿩͢͜ͱ w ϑϨʔϜϫʔΫ͔ΒϩδοΫΛ੾Γ཭͢ w ӬଓԽ w αʔόαΠυͱฒߦͨ͠։ൃ w ϓϩμΫτνΣοΫ

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ϑϨʔϜϫʔΫ͔Βϩ δοΫΛ੾Γ཭͢

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ϑϨʔϜϫʔΫ w "OESPJE4%,͕ఏڙ͢ΔɺΞϓϦ΍ը໘ͷϥΠ ϑαΠΫϧͱڧ݁͘ͼ͍ͭͨΫϥε

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ϩδοΫΛͲ͜ʹॻ͔͘ w º"DUJWJUZ 'SBHNFOUʹ௚઀ॻ͘ w ංେԽɺςετෆՄೳ w ˛$VTUPN7JFXʹ௚઀ॻ͘ w 7JFXͷϩδοΫ͸͜͜ʹॻ͚͹ྑ͍ w ͦΕҎ֎ͷ৔ॴ

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ͦΕҎ֎ͷ৔ॴʁ w ϩδοΫΛந৅Խͯ͠੾Γग़͢ w d$POUSPMMFS d.BOBHFSͳͲɺϩδοΫ୲౰ ΫϥεΛ࡞Δ

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ϩδοΫͷந৅ͷ*OTUBODFΛ Ͳ͜Ͱ࡞Δ͔ʁ w ˛ར༻͢Δ"DUJWJUZʹ௚઀ॻ͘ w ݁ͼ͖͕ͭڧ͘ͳΔ w ςετͷ࣌ʹڍಈΛม͍͑ͨͱ͖͸ʁ w ˓ར༻͢Δͷ֎෦Ͱੜ੒ɾ؅ཧ w ґଘͤ͞ͳ͍ w ςετ࣌ʹ͸੾Γସ͑Δɺͱ͍ͬͨ͜ͱ͕༰қ w %*

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ૉ๿ͳ%* public EntryManager(APIClient apiClient) { this.mAPIClient = apiClient;  ... }

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ૉ๿ͳ%*࢖͑ͳ͍໰୊ w "DUJWJUZͱ'SBHNFOUʹରͯ͠͸ແྗ w ίϯετϥΫλͰΠϯελϯε౉ͤͳ͍ w 1BSDFMBCMFʹͯ͠ؤுΕ͹Ͱ͖ͳ͍͜ͱ͸ͳ͍͕ ؤுΓͨ͘ͳ͍ w ͜ͷ໰୊͸%*ίϯςφ͕͋Ε͹ղܾ͢Δ

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%*ίϯςφ w ґଘ஫ೖΛߦ͏ϑϨʔϜϫʔΫ w खಈͰ࢓૊ΈΛ༻ҙ͠ͳͯ͘ྑ͍ w Πϯελϯε؅ཧ΋ߦͳ͑Δ

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Ͳͷ%*ίϯςφΛ࢖͏΂͖ ͔ʁ w 3PCP(VJDF w %BHHFS w %BHHFS

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%BHHFS

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%BHHFS w IUUQTHJUIVCDPNHPPHMFEBHHFS w %*ίϯςφ w 4RVBSF͕։ൃͯͨ͠%BHHFSͷHPPHMFGPSL

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%BHHFSͷར఺ w ίϯύΠϧ࣌ʹίʔυੜ੒͠ґଘղܾ w ࣮ߦதͷύϑΥʔϚϯεʹӨڹ͠ͳ͍ w σόοάͰίʔυΛ௥͍΍͍͢

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%*ͷߏ੒ w .PEVMF w *OTUBODFͷੜ੒ํ๏Λهड़ w $PNQPOFOU w .PEVMF಺ͷ*OTUBODFΛͲ͜ʹJOKFDU͢Δ͔ه ड़ w ֊૚ߏ଄Λ΋ͨͤͯ໾ׂΛ෼୲͠໌֬Խ

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.PEVMF @Module   public class MainModule { ... @Provides  EntryManager provideEntryManager() { return new EntryManager(mService); } ...

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$PNQPOFOU @Component(modules = MainModule.class) public interface MainComponent { void inject(MainActivity mainActivity) …

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*OKFDU public class MainActivity extends AppCompatActivity { @Inject EntryManager mEntryManager; @Override   protected void onCreate(Bundle b) { ... ((App) getApplication()) .component() .inject(this); ...

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5FTU༻.PEVMF @Module   public class MainTestModule { ... @Provides  EntryManager provideEntryManager() { return new EntryManager(mStubService); } ...

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ςετ༻$PNQPOFOU @Component(modules = MainTestModule.class) public interface MainTestComponent { void inject(EntryManagerTestCase testCase) …

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*OKFDU ςετ public class EntryManagerTestCase extends InstrumentationTestCase {  …  @Inject  EntryManager mEntryManager;  … public testGetEntries() { assertEquals( "ΤϯτϦऔಘͰ͖͍ͯΔ", false, mEntryManager.getEntries().isEmpty()); }  }

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$PNQPOFOUͷ෼͚ํ w "DUJWJUZ΍'SBHNFOUຖʹ෼͚Δʁ w ਺͕υϯυϯ૿͍͑ͯ͘ w ໾ׂ͝ͱʹ෼͚Δ w ֊૚ߏ଄Λ࡞ͬͯࡉ෼Խ

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4VC$PNQPOFOU @Component(modules = MainModule.class)  public interface MainComponent {  void inject(App app);    // Activities  void inject(RootActivity rootActivity);    // Fragments  void inject(MainSettingsFragment mainSettingsFragment);    // Subcomponents  UserComponent userComponent(UserModule userModule); }

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4VC$PNQPOFOU @Subcomponent(modules = UserModule.class)  public interface UserComponent {    // Fragments  void inject(MyFragment myFragment);    UserController userController();  }

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$PNQPOFOUΛऔಘ public class MyFragment extends Fragment { MainComponent mainComponent = App.get(getActivity())  .getMainComponent();   UserComponent userComponent = mainComponent.userComponent( new UserModule( mainComponent.getRealm(), args.getString(ARGS_USER_ID)));  userComponent.inject(this); }

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ӬଓԽ

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ӬଓԽ͢Δ໨త w 8FC"1*͔ΒͷϨεϙϯεΛӬଓԽ w ΦϑϥΠϯ༻ͷΩϟογϡσʔλͷͨΊ w "DUJWJUZ΍'SBHNFOUͷ࠶ੜ੒࣌ʹ෮ؼ͢ΔͨΊ w ෳ਺ͷը໘Ͱಉ͡σʔλΛදࣔ͢Δͱ͖ͷҰ؏ ੑΛอͪ΍͘͢͢ΔͨΊ

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ӬଓԽ͢Δखஈ w º4IBSFE1SFGFSFODFTʹೖΕΔ w ˛'JMFʹॻ͖ͩ͢ w ˓42-JUFʹೖΕΔ w ˓3FBMNΛ࢖͏

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42-JUF w "OESPJEඪ४ͳͷͰ҆৺ײ͕͋Δ w ࣗྗͰॻ͘ͷ͸গʑ໘౗͍͘͞ w 03.࢖͏ʁ w ࢖͍΍͢͞ɺૣ͞ɺ҆ఆɺকདྷੑʜ

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3FBMN w ։ൃ͕׆ൃ w 42-JUFͷΑ͏ͳ໘౗ͳ͜ͱΛ͠ͳͯ͘ྑ͍ w ˛όʔδϣϯະຬ

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3FBMNΛ࢖͏ w J04ΞϓϦͱ ՄೳͳݶΓ ڞ௨ͷϞσϧΛ࣋ͪͨ ͍ͨΊ w ։ൃ׆ൃ͔ͩΒԿ͔͋ͬͯ΋ରॲ͞ΕΔͰ͋Ζ ͏

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3FBMN

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3FBMN w 42-JUFΛஔ͖׵͑͏Δ.PCJMFEBUBCBTF w 03.ͷػೳ΋࣋ͭ w ߴ଎ w J04Ͱ΋ར༻Մೳ

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3FBMNΛ࢖͏ new RealmConfiguration.Builder(context)  .name("realm")  .schemaVersion(1L)  .build();

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3FBMNΛ࢖͏ RealmResults followingEntries = mRealm.where(Entry.class) .equalTo("isFollowing",true) .findAllSortedAsync( "createdAt", Sort.DESCENDING);

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"DUJWJUZੜ੒࣌ʹҾ͘ public class MainActivity extends AppCompatActivity { … public void onCreate(Bundle savedInstanceState) { mRealmResults = mRealm.where().findAllAsync() … } w ͙͢͞·3FBMN3FTVMUTΛಘΔ w ਖ਼͘͠෮ݩ͢ΔͨΊʹ΋࢖͏

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"EBQUFSʹ3FBMN3FTVMU public class EntriesAdapter { public EntriesAdapter(RealmResults entries) {  mEntries = entries;  mRealmChangeListener = new RealmChangeListener() {  @Override  public void onChange() {  mListItems = getItems();  EpisodesAdapter.this.notifyDataSetChanged();  }  }; …  } …

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"EBQUFSʹ3FBMN3FTVMU public class EntriesAdapter { … @Override  public void onAttachedToRecyclerView(RecyclerView recyclerView) {  super.onAttachedToRecyclerView(recyclerView);  mResults.addChangeListener(mRealmChangeListener);  }    @Override  public void onDetachedFromRecyclerView(RecyclerView recyclerView) {  mResults.removeChangeListener(mRealmChangeListener);  super.onDetachedFromRecyclerView(recyclerView);  } …

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"DUJWJUZؒͷσʔλड͚౉͠ Intent intent = new Intent(context, EpisodeActivity.class); intent.putExtra(EXTRA_ID, Id); w 3FBMNͷ*%Λ౉͢͜ͱʹͯ͠͠·͏ w ࠶ੜ੒ʹ΋උ͑ΕΔ͜ͱʹͳΔ

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3FBMN Λ %BHHFS Ͱ εϨου͝ͱʹ*OKFDU

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εϨου·ͨ͛ͳ͍໰୊ w 3FBMN*OTUBODF͕࡞੒͞ΕͨεϨου͔Βଞͷ εϨουͰ࢖͑ͳ͍ w ͔͠͠*OKFDU͸PO$SFBUF Ͱߦ͍͍ͨ w ʮผεϨου͕ཉ͍࣌͠ʹ*OKFDU͢Δ࢓૊Έʯ͕ ඞཁ

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%BHHFSͷ1SPWJEFSΛ࢖͏ … @Inject public EntryPrefetcher(Provider realmProvider) extends ThreadPoolExecutor { mRealmProvider = realmProvider; … private static class Task implements Callable { @Override  public String call() throws Exception { Realm realm = mRealmProvider.get(); … } …

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αʔόαΠυ ͱ ฒߦͨ͠։ൃ

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αʔόαΠυͱฒߦͨ͠։ൃ w "1*͕ඞͣ͠΋ઌߦ͢Δͱ͸ݶΒͳ͍ w μϛʔσʔλΛΞϓϦ಺෦ʹ͔࣋ͭʁ w "1*ʹมߋ͕͋ͬͨ࣌ʹ໘౗ w J04ଆ΋ಉ࣌ʹมߋ͢Δඞཁ͕ग़ͯ͘Δ

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4UVC4FSWFS

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4UVC4FSWFS w μϛʔͷϨεϙϯεΛฦ͢αʔόΛ࡞Δ w "1*4DIFNB όϦσʔλͱͯ͠ར༻ w IUUQTHJUIVCDPNIJUPEF"1*4DIFNB

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4UVC4FSWFS SFTPVSDFMPHJO@SFRVFTU\ UZQFPCKFDU EFTDSJQUJPOϩάΠϯϦΫΤετ QSPQFSUJFT\ FNBJM@BEESFTT\ UZQFTUSJOH EFTDSJQUJPOϝʔϧΞυϨε FYBNQMFBCD!FYBNQMFDPN ^ QBTTXPSE\ UZQFTUSJOH EFTDSJQUJPObύεϫʔυ FYBNQMF1BTTXSE ^ ^ SFRVJSFE<FNBJM@BEESFTT QBTTXPSE> ^

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ςετͰ΋4UVC4FSWFSΛ ࢖͏ w ˛μϛʔͷ+40/Λ಺෦ʹ࣋ͬͯςετʹར༻ w "1*มΘΔͨͼʹมߋͤͶ͹ͳΒͳ͍ w "1*ͷมߋʹςετ͕ؾ෇͚ͳ͍ w ̋"1*ͷαʔόΛ௚઀ୟ͘ w μϛʔσʔλෆཁ w มߋʹςετ͕ؾ͕ͭ͘

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ϓϩμΫτνΣοΫ

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ϓϩμΫτνΣοΫ w ژ౎ɾ౦ژʹΦϑΟε͕͋Δ w ౦ژʹ΋σβΠφʔ͕͍Δ w ख৮Γ͸௚઀৮Εͳ͍ͱΘ͔Βͳ͍

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#FUB#Z$SBTIMZUJDT KFOLJOT GBTUMBOF

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#FUB w #FUB#Z$SBTIMZUJDTΛ࢖ͬͯ#FUB഑৴ w ഑৴ͷλΠϛϯά͸KFOLJOTʹ೚ͤΔ

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KFOLJOT w ϒϥϯνΛݟͯͯɺNBTUFSʹϚʔδ͞ΕͨΒ #FUBΛඈ͹͢ w εΫϦʔϯγϣοτΛࡱͬͯ؆қతͳσβΠϯ֬ ೝ w "1*ຖͷࠩҟ౳Λ֬ೝ w 4MBDLʹ௨஌

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GBTUMBOF (JUIVC࿈ܞ EBUB\TUBUFTUBUF UBSHFU@VSMUBSHFU@VSM DPOUFYUDPOUFYU EFTDSJQUJPO^ IFBEFST\"VUIPSJ[BUJPOUPLFO\UPLFO^^ &YDPOQPTU VSM IFBEFSTIFBEFST CPEZ EBUBUP@KTPO

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GBTUMBOF 4MBDL࿈ܞ TMBDL NFTTBHFSPDLFUϏϧυ͕׬ྃ͠·ͨ͠SPDLFU DIBOOFMBQQ TVDDFTTUSVF QBZMPBE\ #VJME%BUF5JNFOFXUP@T ^ EFGBVMU@QBZMPBET<HJU@CSBODI HJU@BVUIPS>

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ςετ࣮ߦ EFTD3VOTBMMUIFUFTUT MBOFUFTUEP HSBEMF UBTLD$ FOE

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·ͱΊ w ϑϨʔϜϫʔΫ͔ΒϩδοΫΛ੾Γ཭͢ w ϩδοΫͷந৅Խɺ%BHHFSͰ*OKFDU w ӬଓԽ w 3FBMNΛར༻ w αʔόαΠυͱฒߦͨ͠։ൃ w 4UVC4FSWFSΛར༻ w ϓϩμΫτνΣοΫ w #FUB#Z$SBTIMZUJDT KFOLJOT GBTUMBOF

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͋Γ͕ͱ͏͍͟͝·ͨ͠