Android Architecture Components

"OESPJE "SDIJUFDUVSF$PNQPOFOUT 4IJCVZBBQL 3FQPSUGSPN(PPHMF*0 UBLBIJSPN

˖ "OESPJEָ㥨ֹדׅ ˖ 5XJUUFSכUBLBIJSPN !OFX@SVOOBCMF ˖ UBLBIJSPNהְֲせ⵸ד  2JJUBזו׮剅ְגְ׷ךד  ״׹׃ֶֻ격ְ׃תׅ
荈䊹稱➜

⟃♴אךإحءّٝ ˖ *OUSPEVDUJPO ˖ 4PMWJOHUIF-JGFDZDMF1SPCMFN ˖ 1FSTJTUFODFBOE0JOF (PPHMF*0דך "SDIJUFDUVSF$PNQPOFOUT

⟃♴אךإحءّٝ ˖ *OUSPEVDUJPO ˖ "OESPJE"SDIJUFDUVSF$PNQPOFOUTך嚊銲铡僇 ˖ "OESPJE%FWFMPQFSTך  (VJEFUP"QQ"SDIJUFDUVSF ˖ 4PMWJOHUIF-JGFDZDMF1SPCMFN
˖ -JGFDZDMFꟼ鸬ך$PNQPOFOUT ˖ 1FSTJTUFODFBOE0JOF ˖ 宕竲⻉ٓ؎ـٓٔך3PPN $PNQPOFOUTךא (PPHMF*0דך "SDIJUFDUVSF$PNQPOFOUT

(VJEFUP"QQ"SDIJUFDUVSF

(VJEFUP"QQ"SDIJUFDUVSF "SDIJUFDUVSF$PNQPOFOUT׾⢪欽׃גծ 㛙暕דٌآُ٦ٕ⻉װذأزָ〳腉ז،فٔ׾ 圓眠ׅ׷倯岀ָ剅ַ׸גְ׷ IUUQTEFWFMPQFSTKQHPPHMFCMPHDPNBOESPJEBOEBSDIJUFDUVSFIUNM״׶

湡如 ˖ "SDIJUFDUVSF$PNQPOFOUTהכ ˖ "SDIJUFDUVSF$PNQPOFOUTךぐ갪湡ך知⽃ז  铡僇 ˖ (VJEFUP"QQ"SDIJUFDUVSFד铡僇ׁ׸גְ׷  ⾱⵱ך铡僇 ˖
(VJEFUP"QQ"SDIJUFDUVSFח⵱׏׋㹋鄲׾  鋅ג׫׷

"OESPJE "SDIJUFDUVSF$PNQPOFOUTה כ

– Android DevelopersͷAndroid Architecture ComponentsΑΓ l"OFXDPMMFDUJPOPGMJCSBSJFTUIBUIFMQZPV EFTJHOSPCVTU UFTUBCMF BOENBJOUBJOBCMF BQQT
4UBSUXJUIDMBTTFTGPSNBOBHJOHZPVS6* $PNQPOFOUTMJGFDZDMFBOEIBOEMJOHEBUB QFSTJTUFODFz 㛙暕דծذأز〳腉דծًٝذشٝأ׃װְׅ،فٔך 鏣鎘׾⸔ֽ׷倜׃ְٓ؎ـٓٔך꧊ת׶דׅկ 6*؝ٝه٦طٝزךٓ؎ؿ؟؎ؙٕך盖椚ה ر٦ةך宕竲⻉׾䪔ֲ׋׭ךؙٓأַ׵㨣׭ג׫ת׃׳ֲկ

"SDIJUFDUVSF$PNQPOFOUTך 圓䧭銲稆 ˖ -JGFDZDMF0XOFS -JGFDZMF0CTFSWFS ˖ ٓ؎ؿ؟؎ؙٕ׾䠐陎׃׋؝ٝه٦طٝز׾⡲䧭ׅ׷ֿהָ  דֹ׷ ˖ -JWF%BUB
˖ 錁庠〳腉 0CTFSWBCMF זر٦ةمٕت٦ ˖ 7JFX.PEFM ˖ 6*חꟼ鸬ׅ׷ر٦ة׾⥂䭯ׅ׷ؙٓأ ˖ 3PPN ˖ 42-JUF׾知⽃ח䪔ֲٓ؎ـٓٔ  42-JUFךػٙ٦׾崞欽׃ծ厫鮾חر٦ةك٦أח،ؙإأדֹ׷ؔـ آؙؑزوحؾؚٝ䬄韋⻉ٖ؎َ٦׾䲿⣘

˖ -JGFDZDMF0XOFS -JGFDZMF0CTFSWFS ˖ -JWF%BUB ˖ 7JFX.PEFM ˖ 3PPN "SDIJUFDUVSF$PNQPOFOUTך
圓䧭銲稆 NBWFOQBDLBHFך⣛㶷ꟼ⤘

♧א׆א知⽃ח 鋅גְֹתׅ

class MyLifecycleActivity : LifecycleActivity() { override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState) this.lifecycle.addObserver(MyObserver()) } } class MyObserver : LifecycleObserver { @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) fun onResume() { Log.d("MyObserver","onResume") } @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) fun onPause() { Log.d("MyObserver","onPause") } } -JGFDZDMF0XOFS -JGFDZMF0CTFSWFSהכ ٓ؎ؿ؟؎ؙٕ׾䠐陎׃׋؝ٝه٦طٝز׾⡲䧭ׅ׷ֿהָ  דֹ׷

super.onCreate(savedInstanceState) this.lifecycle.addObserver(MyObserver()) } } class MyObserver : LifecycleObserver { @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) fun onResume() { Log.d("MyObserver","onResume") } @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) fun onPause() { Log.d("MyObserver","onPause") } } -JGFDZDMF0XOFS -JGFDZMF0CTFSWFSהכ -JGFDZDMF"DUJWJUZכ -JGFDZDMF0XOFS׾㹋鄲׃גְ׷ "QQ$PNQBU"DUJWJUZח窟さ✮㹀

super.onCreate(savedInstanceState) this.lifecycle.addObserver(MyObserver()) } } class MyObserver : LifecycleObserver { @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) fun onResume() { Log.d("MyObserver","onResume") } @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) fun onPause() { Log.d("MyObserver","onPause") } } -JGFDZDMF0XOFS -JGFDZMF0CTFSWFSהכ -JGFDZDMF0XOFSַ׵ -JGFDZDMFؔـآؙؑز׾《䖤׃ BEE0CTFSWFSׅ׷

super.onCreate(savedInstanceState) this.lifecycle.addObserver(MyObserver()) } } class MyObserver : LifecycleObserver { @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) fun onResume() { Log.d("MyObserver","onResume") } @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) fun onPause() { Log.d("MyObserver","onPause") } } -JGFDZDMF0XOFS -JGFDZMF0CTFSWFSהכ -JGFDZDMF0CTFSWFSדכ !0O-JGFDZDMF&WFOUדٓ؎ؿ؟؎ؙٕך ؎كٝز׾「ֽ《׷ֿהָ⳿勻׷

super.onCreate(savedInstanceState) this.lifecycle.addObserver(MyObserver()) } } class MyObserver : LifecycleObserver { @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) fun onResume() { Log.d("MyObserver","onResume") } @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) fun onPause() { Log.d("MyObserver","onPause") } } -JGFDZDMF0XOFS -JGFDZMF0CTFSWFSהכ ٓ؎ؿ؟؎ؙٕ׾䠐陎׃׋؝ٝه٦طٝزָ⡲䧭דֹ׷

˖ 㣐ְֹ'SBHNFOUװ"DUJWJUZ׾ⴓ鍑ׅ׷ֿהָ ⳿勻׷ ˖ ؔـآؙؑزָٓ؎ؿ؟؎ؙٕד盖椚ָׁ׸ גְ׷朐䡾חז׷ ˖ ٓ؎ـٓٔ׾⡲׷儗ח⢪ִ׷ ˖ ؕأةي-JGFDZDMF0XOFS׾⡲׷ֿהדذأز
ָ〳腉חז׷ -JGFDZDMF0XOFS -JGFDZMF0CTFSWFSכז׈䗳銲ַ

-JGFDZDMF0XOFS -JGFDZMF0CTFSWFS דכ ְ׹׿ז؎كٝز׾鋅ג  黝ⴖח盖椚ׅ׷䗳銲ָ֮׷

-JWF%BUB׌ה׮׏ה嚂ח ז׷

˖ 錁庠〳腉 0CTFSWBCMF זر٦ةمٕت٦ ˖ ٓ؎ؿ؟؎ؙٕח״׶⹛ָֹ㢌׻׷ val stringLiveData = //
LiveDataΫϥεͷΠϯελϯε࡞੒ stringLiveData.observe(this, Observer<String?> { value -> // σʔλΛऔಘɺมߋ͞ΕͨΒݺ͹ΕΔ }) -JWF%BUB

˖ ر٦ةָإحزׁ׸׋儗ח  -JWF%BUBכ4UBUF45"35&%ד֮׸ל  ر٦ة׾PCTFSWF׃גְ׷ؔـآؙؑزח床ׅ ˖ 荈⹛ד飑铣ך盖椚ָדֹ׷  ⹧䩛חPO%FTUPSZדSFNPWF0CTFSWFSׁ׸׷ ˖ 歗꬗ַ׵ꨄ׸גְג䨱׏גֹ׋儗חծ 
剑倜ךر٦ة׾床ׅ -JWF%BUB ٓ؎ؿ؟؎ؙٕ׾䠐陎׃זֻג׮ؙٓحءׇُ׆ח 知⽃חⳢ椚ָדֹ׷

class LocationLiveData(context: Context) : LiveData<Location>() { private val locationManager: LocationManager
= context.getSystemService( Context.LOCATION_SERVICE) as LocationManager private val listener = object : LocationListener { override fun onLocationChanged(location: Location) { value = location } … } override fun onActive() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0f, listener) } override fun onInactive() { locationManager.removeUpdates(listener) } } -JWF%BUBך⡲׶倯 ⡘縧䞔㜠׾床ׅ-JWF%BUBך⢽

= context.getSystemService( Context.LOCATION_SERVICE) as LocationManager private val listener = object : LocationListener { override fun onLocationChanged(location: Location) { value = location } … } override fun onActive() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0f, listener) } override fun onInactive() { locationManager.removeUpdates(listener) } } -JWF%BUBך⡲׶倯 -JWF%BUBؙٓأ׾竰䪫ׅ׷

= context.getSystemService( Context.LOCATION_SERVICE) as LocationManager private val listener = object : LocationListener { override fun onLocationChanged(location: Location) { value = location } … } override fun onActive() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0f, listener) } override fun onInactive() { locationManager.removeUpdates(listener) } } -JWF%BUBך⡲׶倯 PO"DUJWF ד -PDBUJPO.BOBHFSךٔأش٦׾إحز

= context.getSystemService( Context.LOCATION_SERVICE) as LocationManager private val listener = object : LocationListener { override fun onLocationChanged(location: Location) { value = location } … } override fun onActive() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0f, listener) } override fun onInactive() { locationManager.removeUpdates(listener) } } -JWF%BUBך⡲׶倯 ⡘縧䞔㜠ח㢌刿ָ֮׏׋׵-JWF%BUBTFU7BMVF׾ㄎן⳿ׅ

= context.getSystemService( Context.LOCATION_SERVICE) as LocationManager private val listener = object : LocationListener { override fun onLocationChanged(location: Location) { value = location } … } override fun onActive() { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0f, listener) } override fun onInactive() { locationManager.removeUpdates(listener) } } -JWF%BUBך⡲׶倯 PO*OBDUJWF ד ٔأش٦׾⵴ꤐׅ׷

super.onCreate(savedInstanceState) val stringLiveData = // LiveDataΫϥεͷΠϯελϯε࡞੒ stringLiveData.observe(this, Observer<String?> { value -> // σʔλΛऔಘɺมߋݕ஌ }) 歗꬗㔐鯄儗ח"DUJWJUZָⱄ欰䧭ׁ׸ծת׋PO$SFBUFָㄎל׸ծ ⱄ《䖤ׁ׸ג׃תֲ -JWF%BUB׾⢪׏גְ׷儗ח 歗꬗㔐鯄ָ饯ֿ׷הծծ ׉ֿד7JFX.PEFM

7JFX.PEFM ˖ 7JFX.PEFMכ歗꬗㔐鯄׃ג׮ 婍׶竲ֽ׷կ ˖ 6*ך׋׭ךر٦ة׾⥂䭯ׅ׷ ˖ GSBHNFOU꟦ך؝ىُص؛٦ ءّٖٝ؎َ٦ה׃ג׮堣腉 ׅ׷

7JFX.PEFM class MyLifecycleActivity : LifecycleActivity() { override fun onCreate(savedInstanceState: Bundle?)
{ super.onCreate(savedInstanceState) val activityViewModel = ViewModelProviders.of(this) .get(MyActivityViewModel::class.java) val locationLiveData = activityViewModel.locationLiveData locationLiveData.observe(this, Observer<Location?> { location -> // }) ... } class MyActivityViewModel(application: Application):  AndroidViewModel(application) { val locationLiveData: LocationLiveData = LocationLiveData(application) }

{ super.onCreate(savedInstanceState) val activityViewModel = ViewModelProviders.of(this) .get(MyActivityViewModel::class.java) val locationLiveData = activityViewModel.locationLiveData locationLiveData.observe(this, Observer<Location?> { location -> // }) ... } class MyActivityViewModel(application: Application):  AndroidViewModel(application) { val locationLiveData: LocationLiveData = LocationLiveData(application) } 7JFX.PEFM1SPWJEFSTַ׵7JFX.PEFM׾《䖤ׅ׷

{ super.onCreate(savedInstanceState) val activityViewModel = ViewModelProviders.of(this) .get(MyActivityViewModel::class.java) val locationLiveData = activityViewModel.locationLiveData locationLiveData.observe(this, Observer<Location?> { location -> // }) ... } class MyActivityViewModel(application: Application):  AndroidViewModel(application) { val locationLiveData: LocationLiveData = LocationLiveData(application) } 7JFX.PEFMדכ-JWF%BUB׾⥂䭯ׅ׷ "OESPJE7JFX.PEFM׾⢪ֲהBQQMJDBUJPOָ⢪ִ׷

{ super.onCreate(savedInstanceState) val activityViewModel = ViewModelProviders.of(this) .get(MyActivityViewModel::class.java) val locationLiveData = activityViewModel.locationLiveData locationLiveData.observe(this, Observer<Location?> { location -> // }) ... } class MyActivityViewModel(application: Application): ViewModel() { val locationLiveData: LocationLiveData = LocationLiveData(application) } -JWF%BUBך朐䡾׾湊鋔ׅ׷

3PPN ˖ 42-JUF׾䪔ְװֻׅׅ׷ٓ؎ـٓٔ ˖ ؝ٝػ؎ٕ儗חָؙؒٔ嗚鏾ׁ׸׷ ˖ 42-JUF׾ⵃ欽ׅ׷儗חⱔꞿז؝٦سְָ׵זְ ˖ אך㣐ֹז؝ٝه٦طٝزָ֮׷ ˖
&OUJUZ %BUB"DDFTT0CKFDU %BUBCBTF

&OUJUZ @Entity class Memo(@PrimaryKey(autoGenerate = true) val uid: Int =
0, val title: String, val text: String) !&OUJUZ׾אֽ׷ !1SJNBSZ,FZד1SJNBSZ,FZה׃גو٦ؙ׾אֽ׋׶ծ JE׾⹧䩛ח⡲׏גֻ׸׷ؔفءָّ֮ٝ׏׋׶ׅ׷

%BUB"DDFTT0CKFDU @Dao interface MemoDao { @Query("SELECT * FROM memo ORDER
BY uid DESC") fun get(): LiveData<List<Memo>> @Insert fun insertAll(vararg memos: Memo) @Update fun editMemo(memo: Memo) } !%BP׾אֽ׷ ؝ٝػ؎ٕ儗ח!2VFSZך42-ךⰻ㺁ָ嗚鏾ׁ׸׷ ؝ٝػ؎ٕ儗ח؝٦سָ欰䧭ׁ׸׷ 鵤׶⦼ח-JWF%BUBװ3Y+BWBך'MPXBCMF׾ⵃ欽ׅ׷ה  ر٦ةك٦أך刿倜׾「ֽ《׸׷

3PPN%BUBCBTF @Database(entities = arrayOf(Memo::class), version = 1) abstract class AppDatabase
: RoomDatabase() { abstract fun memoDao(): MemoDao } val db = Room.databaseBuilder(application, AppDatabase::class.java, "database-name").build() fun getMemo(): LiveData<List<Memo>> { return db.memoDao().get() } !%BUBCBTF׾אֽ׷ FOUJUJFTװWFSTJPO׾䭷㹀ׅ׷

(VJEFUP"QQ"SDIJUFDUVSF

(VJEFUP"QQ"SDIJUFDUVSF ⰻ㺁 ˖ "OESPJE،فٔꟚ涪ח黝欽ׁ׸׷ ⾱⵱ך㹀纏 ˖ ׉ך⾱⵱׾黝欽דֹ׷  ،فٔ،٦ؗذؙثٍך铡僇 ˖ ،٦ؗذؙثٍ؝ٝه٦طٝز׾
⢪׏׋،٦ؗذؙثٍך㹋鄲倯岀 ך铡僇 IUUQTEFWFMPQFSTKQHPPHMFCMPHDPNBOESPJEBOEBSDIJUFDUVSFIUNM״׶ IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSFHVJEFIUNM

אך鏣鎘ך♳דꅾ銲ז銲稆ָ֮׷ה剅ַ׸גְ׷կ ˖ ְ׍ל׿ꅾ銲זךכꟼ䗰✲ךⴓꨄկ"DUJWJUZװ 'SBHNFOUחⰋג剅ַ׸׷ךָ״ֻ֮׷꟦麩ְկ ˖ 04ח״׶盖椚ׁ׸׷ؙٓأד֮׶ծ  ٓ؎ؿ؟؎ؙٕך㉏겗׾鼘ֽ׷׋׭կ ˖ 宕竲⻉ׁ׸׋ٌرַٕ׵6*׾⹛ַֿׅהկ
˖ 04ח״׷ٔا٦أ鍑佝הطحزٙ٦ؙ䱸竲ָ♶ 㸜㹀ז儗חِ٦ؠ٦ָر٦ة׾㣟׻זְ״ֲח ׅ׷׋׭կ "OESPJE،فٔꟚ涪ח黝欽ׁ׸׷⾱⵱ך㹀纏  $PNNPOBSDIJUFDUVSBMQSJODJQMFT IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSFHVJEFIUNM״׶

䭷ꆙ (VJEJOHQSJODJQMFT ˖ "DUJWJUZծ4FSWJDFזוחכر٦ة׾⥂䭯׃זְ ˖ ٌآُ٦ٕך顑⹡׾ⴓꨄ׃״ֲ ˖ ٌآُ٦ٕ꟦דװ׶《׶ׅ׷㜥さכⰻ鿇㹋鄲׾ⰕꟚ׃זְ ˖ ٌآُ٦ٕ꟦דװ׶《׶ׅ׷㜥さכذأزָדֹ׷״ֲחׅ׷
˖ ن؎ٓ٦فٖ٦زז؝٦س׾⡦䏝׮剅ְג儗꟦׾嶊顤׃זְ  "SDIJUFDUVSF$PNQPOFOUTװ䱿㤺הז׏גְ׷ٓ؎ـٓٔ׾ⵃ欽ׅ׷ ˖ ؔؿٓ؎ٝד׮⹛⡲ׅ׷״ֲח倜׃ְꟼ鸬ָ֮׷ر٦ة׾⥂㶷ׅ׷ֿה ˖ ずׄر٦ةا٦أַ׵邌爙׾遤ֲ״ֲחׅ׷  ♧אך-JWF%BUB׾醱侧ךהֿ׹ד鋅׋׶ׅ׷ IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSFHVJEFIUNM״׶

"SDIJUFDUVSF$PNQPOFOUT ך؟ٝفٕ،فٔ׾鋅ג ו׿ז괏ח׉׸׊׸ך؝ٝ ه٦طٝز׾⢪ֲַ鋅ג׫ ״ֲ

؟ٝفٕ؝٦س׾鋅גְֲֿ (JU)VCךٔهآزٔ׾嗚稊׃׋׶ ِ٦ؠ٦ךٔهآزٔ♧鋮׾邌爙 דֹ׷،فٔ BOESPJEBSDIJUFDUVSF$PNQPOFOUTך؟ٝفٕ ،فٔך♧鸬ךⳢ椚ך崧׸׾鋅ג׫׷ IUUQRJJUBDPNUBLBIJSPNJUFNT BGFEDFCB IUUQTHJUIVCDPNHPPHMFTBNQMFT BOESPJEBSDIJUFDUVSFDPNQPOFOUTUSFF
NBTUFS(JUIVC#SPXTFS4BNQMF

؟ٝفٕ؝٦س׾鋅גְֲֿ ➙㔐כ俑㶵׾Ⰵ⸂׃גؒٝة٦׾ 䬃׃גַ׵ך⹛ֹ׾鋅ג׫ת׃׳ֲ

'SBHNFOU7JFX.PEFM IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSFHVJEFIUNM״׶

public class SearchFragment extends LifecycleFragment implements Injectable { @Inject ViewModelProvider.Factory
viewModelFactory; private SearchViewModel searchViewModel; ... @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); searchViewModel = ViewModelProviders.of(this, viewModelFactory).get(SearchViewModel.class); ... private void doSearch(View v) { String query = binding.get().input.getText().toString(); ... // ͜͜ͰViewModel΁ͷݺͼग़͠ʂʂ searchViewModel.setQuery(query); } 'SBHNFOU7JFX.PEFM

viewModelFactory; private SearchViewModel searchViewModel; ... @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); searchViewModel = ViewModelProviders.of(this, viewModelFactory).get(SearchViewModel.class); ... private void doSearch(View v) { String query = binding.get().input.getText().toString(); ... // ͜͜ͰViewModel΁ͷݺͼग़͠ʂʂ searchViewModel.setQuery(query); } 'SBHNFOU7JFX.PEFM 7JFX.PEFM1SPWJEFSTח״׶  TFBSDI7JFX.PEFM׾⡲䧭ׅ׷

viewModelFactory; private SearchViewModel searchViewModel; ... @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); searchViewModel = ViewModelProviders.of(this, viewModelFactory).get(SearchViewModel.class); ... private void doSearch(View v) { String query = binding.get().input.getText().toString(); ... // ͜͜ͰViewModel΁ͷݺͼग़͠ʂʂ searchViewModel.setQuery(query); } 'SBHNFOU7JFX.PEFM 杝荈ך7JFX.PEFM1SPWJEFS'BDUPSZד7JFX.PEFM׾⡲׷ֿהד 7JFX.PEFMךٌحؙ׾⡲׷ֿהָדֹծذأز〳腉ח

viewModelFactory; private SearchViewModel searchViewModel; ... @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); searchViewModel = ViewModelProviders.of(this, viewModelFactory).get(SearchViewModel.class); ... private void doSearch(View v) { String query = binding.get().input.getText().toString(); ... // ͜͜ͰViewModel΁ͷݺͼग़͠ʂʂ searchViewModel.setQuery(query); } 'SBHNFOU7JFX.PEFM &EJU5FYUך؎كٝز״׶ EP4FBSDIָㄎן⳿ׁ׸׷

viewModelFactory; private SearchViewModel searchViewModel; ... @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); searchViewModel = ViewModelProviders.of(this, viewModelFactory).get(SearchViewModel.class); ... private void doSearch(View v) { String query = binding.get().input.getText().toString(); ... // ͜͜ͰViewModel΁ͷݺͼग़͠ʂʂ searchViewModel.setQuery(query); } 'SBHNFOU7JFX.PEFM 7JFX.PEFM׾ㄎן⳿ׅ

7JFX.PEFM3FQPTJUPSZ

public class SearchViewModel extends ViewModel { private final LiveData<Resource<List<Repo>>> results;
private final MutableLiveData<String> query = new MutableLiveData<>(); ... public void setQuery(@NonNull String originalInput) { String input = originalInput.toLowerCase(Locale.getDefault()).trim(); ... query.setValue(input); } ... @Inject SearchViewModel(RepoRepository repoRepository) { ... results = Transformations.switchMap(query, search -> { if (search == null || search.trim().length() == 0) { return AbsentLiveData.create(); } else { return repoRepository.search(search); } }); } ... 7JFX.PEFM3FQPTJUPSZ

private final MutableLiveData<String> query = new MutableLiveData<>(); ... public void setQuery(@NonNull String originalInput) { String input = originalInput.toLowerCase(Locale.getDefault()).trim(); ... query.setValue(input); } ... @Inject SearchViewModel(RepoRepository repoRepository) { ... results = Transformations.switchMap(query, search -> { if (search == null || search.trim().length() == 0) { return AbsentLiveData.create(); } else { return repoRepository.search(search); } }); } ... 7JFX.PEFM3FQPTJUPSZ 7JFX.PEFMך⚥ד-JWF%BUB׾⥂䭯׃גְ׷

private final MutableLiveData<String> query = new MutableLiveData<>(); ... public void setQuery(@NonNull String originalInput) { String input = originalInput.toLowerCase(Locale.getDefault()).trim(); ... query.setValue(input); } ... @Inject SearchViewModel(RepoRepository repoRepository) { ... results = Transformations.switchMap(query, search -> { if (search == null || search.trim().length() == 0) { return AbsentLiveData.create(); } else { return repoRepository.search(search); } }); } ... 7JFX.PEFM3FQPTJUPSZ ת׆ծ-JWF%BUBؙٓأך؎ٝأةٝأךRVFSZח㼎׃ג TFU7BMVF

private final MutableLiveData<String> query = new MutableLiveData<>(); ... public void setQuery(@NonNull String originalInput) { ... SearchViewModel(RepoRepository repoRepository) { ... results = Transformations.switchMap(query, search -> { if (search == null || search.trim().length() == 0) { return AbsentLiveData.create(); } else { return repoRepository.search(search); } }); } ... 7JFX.PEFM3FQPTJUPSZ 5SBOTGPSNBUJPOTTXJUDI.BQח״׶ RVFSZָ㢌刿ׁ׸׋׵؝٦ٕغحָؙ㹋遤ׁ׸׷

private final MutableLiveData<String> query = new MutableLiveData<>(); ... public void setQuery(@NonNull String originalInput) { ... SearchViewModel(RepoRepository repoRepository) { ... results = Transformations.switchMap(query, search -> { if (search == null || search.trim().length() == 0) { return AbsentLiveData.create(); } else { return repoRepository.search(search); } }); } ... 7JFX.PEFM3FQPTJUPSZ SFQP3FQPTJUPSZַ׵嗚稊穠卓ך-JWF%BUB׾《䖤׃ג ًٝغ㢌侧חⰅ׸׷

3FQPTJUPSZ .PEFM 3FNPUF%BUB4PVSDF

3FQPTJUPSZ .PEFM 3FNPUF%BUB4PVSDF @Singleton public class RepoRepository { ... public
LiveData<Resource<List<Repo>>> search(String query) { return new NetworkBoundResource<List<Repo>, RepoSearchResponse>(appExecutors) { @Override protected void saveCallResult(@NonNull RepoSearchResponse item) { ... } @NonNull @Override protected LiveData<List<Repo>> loadFromDb() { ... } @Override protected boolean shouldFetch(@Nullable List<Repo> data) { ... } @NonNull @Override protected LiveData<ApiResponse<RepoSearchResponse>> createCall() { ... } @Override protected RepoSearchResponse processResponse(ApiResponse<RepoSearchResponse> response) { ... } }.asLiveData(); }

3FQPTJUPSZ .PEFM 3FNPUF%BUB4PVSDF @Singleton public class RepoRepository { ... public
LiveData<Resource<List<Repo>>> search(String query) { return new NetworkBoundResource<List<Repo>, RepoSearchResponse>(appExecutors) { @Override protected void saveCallResult(@NonNull RepoSearchResponse item) { ... } @NonNull @Override protected LiveData<List<Repo>> loadFromDb() { ... } @Override protected boolean shouldFetch(@Nullable List<Repo> data) { ... } @NonNull @Override protected LiveData<ApiResponse<RepoSearchResponse>> createCall() { ... } @Override protected RepoSearchResponse processResponse(ApiResponse<RepoSearchResponse> response) { ... } }.asLiveData(); } /FUXPSL#PVOE3FTPVSDF 䖓鶢 ׾ⵃ欽׃ծ ְֻאַך؝٦ٕغحؙ׾㹋鄲׃ծ-JWF%BUBה׃ג鵤ׅ

3FQPTJUPSZ .PEFM @Singleton public class RepoRepository { ... public LiveData<Resource<List<Repo>>>
search(String query) { return new NetworkBoundResource<List<Repo>, RepoSearchResponse>(appExecutors) { ... @NonNull @Override protected LiveData<List<Repo>> loadFromDb() { return Transformations.switchMap(repoDao.search(query), searchData -> { if (searchData == null) { return AbsentLiveData.create(); } else { return repoDao.loadOrdered(searchData.repoIds); } }); } @NonNull @Override protected LiveData<ApiResponse<RepoSearchResponse>> createCall() { return githubService.searchRepos(query); } @Override /FUXPSL#PVOE3FTPVSDF 䖓鶢 ך ؝٦ٕغحؙⰻדSFQP%BPַ׵ر٦ة׾《䖤ׅ׷ 3FQP%BPؙٓأכ3PPN׾⢪׏גְ׷

3FQPTJUPSZ 3FNPUF%BUB4PVSDF @Singleton public class RepoRepository { ... public LiveData<Resource<List<Repo>>>
search(String query) { return new NetworkBoundResource<List<Repo>, RepoSearchResponse>(appExecutors) { ... @NonNull @Override protected LiveData<ApiResponse<RepoSearchResponse>> createCall() { return githubService.searchRepos(query); } @Override protected RepoSearchResponse processResponse(ApiResponse<RepoSearchResponse> response { ... }.asLiveData(); } /FUXPSL#PVOE3FTPVSDF 䖓鶢 ך ؝٦ٕغحؙⰻד 3FUSPUך؟٦ؽأؙٓأַ׵《䖤ׅ׷

/FUXPSL#PVOE3FTPVSDFכזח׾ ׃גְ׷ַ /FUXPSL#PVOE3FTPVSDFך寸㹀加 طحزٙ٦ַؙ׵ر٦ة׾  《䖤׃אא ر؍أؙחٍؗحءُ׃׋ ر٦ة׾ٗ٦سׅ׷崧׸ IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSFHVJEFIUNM״׶

3PPN׾⢪׏גծ%#׾湊鋔ׅ׷

3PPN׾⢪׏גծ%#׾湊鋔ׅ׷ ر٦ةָ ֮׸ל -JWF%BUBה׃ג⦼׾ 6*ח崧ׅ

3PPN׾⢪׏גծ%#׾湊鋔ׅ׷ %#חر٦ةָ ֮׸ל -JWF%BUBה׃ג⦼׾ 6*ח崧ׅ ⦼׾؟٦غ٦ַ׵《䖤ׅ׷ַ וֲַⴻ㹀

֮׸ל -JWF%BUBה׃ג⦼׾ 6*ח崧ׅ ⦼׾؟٦غ٦ַ׵《䖤ׅ׷ַ וֲַⴻ㹀 "1*זו׾〨ְגر٦ة《䖤

-JWF%BUBה׃ג⦼׾ 6*ח崧ׅ ⦼׾؟٦غ٦ַ׵《䖤ׅ׷ַ וֲַⴻ㹀 "1*זו׾〨ְגر٦ة《䖤㣟侁׃׋׵㣟侁ך朐䡾׾ -JWF%BUBך⦼ה׃ג崧ׅ

⦼׾؟٦غ٦ַ׵《䖤ׅ׷ַ וֲַⴻ㹀 "1*זו׾〨ְגر٦ة《䖤㣟侁׃׋׵㣟侁ך朐䡾׾ -JWF%BUBך⦼ה׃ג崧ׅ 䧭⸆׃׋׵%JTLח⥂㶷
⥂㶷ׅ׷הծ♳ח䨱׶ 6*ח⿾僥ׁ׸׷

3FQPTJUPSZ .PEFM @Singleton public class RepoRepository { ... public LiveData<Resource<List<Repo>>>
search(String query) { return new NetworkBoundResource<List<Repo>, RepoSearchResponse>(appExecutors) { ... ... }.asLiveData(); } 穠卓כ-JWF%BUBה׃ג鵤ׅ

3FQPTJUPSZ .PEFM 3FNPUF%BUB4PVSDF

3FQPTJUPSZ .PEFM 3FNPUF%BUB4PVSDF public class SearchFragment extends LifecycleFragment implements Injectable
{ ... searchViewModel.getResults().observe(this, result -> { binding.get().setSearchResource(result); binding.get().setResultCount((result == null || result.data == null) ? 0 : result.data.size()); adapter.get().replace(result == null ? null : result.data); binding.get().executePendingBindings(); }); 7JFX.PEFMך-JWF%BUB׾湊鋔ׅ׷ֿהדծ 7JFXח⿾僥ׅ׷

˖ "SDIJUFDUVSF$PNQPOFOUTכٓ؎ـٓٔה׃ג  3PPN׌ֽזוծ⦐ⴽדⵃ欽דֹ׉ֲ ˖ (VJEFUP"QQ"SDIJUFDUVSFח剅ַ׸גְ׷ֿהכ וְֲֲ鏣鎘׾׃גְג׮ծ⿫罋חז׶׉ֲ ˖ 宕竲⻉㣐✲ ˖ "SDIJUFDUVSF$PNQPOFOUT׾⢪ֲה"OESPJEך؝
ٝه٦طٝزהֲתֻ⹛⡲ׅ׷،فָٔծ嚂חַ ֽ׉ֲ תה׭

˖ ⿫罋ؙٔٝ꧊ ˖ IUUQTHJTUHJUIVCDPNUBLBIJSPN GCECGCEE ⿫罋

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