Inside Jetpack Architecture Components

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)JSPZVLJ.PSJ !NPSJESPJE *OTJEF+FUQBDL "SDIJUFDUVSF$PNQPOFOUT

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"7FOUVSFCFUXFFO4PGUCBOLBOE:BIPP 0OFPGCJHHFTUTFBSDIJO+BQBO

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"SDIJUFDUVSF $PNQPOFOUT

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-JGFDZDMFT -JWF%BUB 7JFX.PEFM 3PPN 1BHJOH %BUB#JOEJOH /BWJHBUJPO 8PSL.BOBHFS %PXOMPBE.BOBHFS .FEJB1MBZCBDL 1FSNJTTJPOT /PUJDBUJPOT 4IBSJOH 4MJDFT "OJNBUJPO5SBOTJUJPOT "VUP 578FBS &NPKJ 'SBHNFOU -BZPVU 1BMFUUF "QQ$PNQBU "OESPJE,59 .VMUJEFY 5FTU

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-JGFDZDMFT -JWF%BUB 7JFX.PEFM 3PPN 1BHJOH %BUB#JOEJOH /BWJHBUJPO 8PSL.BOBHFS "QQ$PNQBU "OESPJE,59

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-JGFDZDMFT -JWF%BUB 7JFX.PEFM 3PPN 1BHJOH %BUB#JOEJOH /BWJHBUJPO 8PSL.BOBHFS "QQ$PNQBU "OESPJE,59 BOESPJEBSDIMJGFDZDMF

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-JGFDZDMF1SPCMFNT JO"OESPJE

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JOFBSMZEBZT

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UPEBZ խ

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DBTF UPVDIJOHEFTUSPZFE7JFX

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DBTFUPVDIJOHEFTUSPZFE7JFX 

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DBTFUPVDIJOHEFTUSPZFE7JFX   Cute Cat

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DBTFUPVDIJOHEFTUSPZFE7JFX   Cute Cat 

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Cute Cat DBTFUPVDIJOHEFTUSPZFE7JFX     

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DBTFUPVDIJOHEFTUSPZFE7JFX       Cute Cat

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DBTFUPVDIJOHEFTUSPZFE7JFX       Cute Cat   

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DBTFUPVDIJOHEFTUSPZFE7JFX       Cute Cat    

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DBTFUPVDIJOHEFTUSPZFE7JFX       Cute Cat     

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DBTF GFUDIJOHBUFWFSZPO$SFBUF

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Cute Cat DBTFGFUDIJOHBUFWFSZPO$SFBUF   

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The Japanese Bobtail is a breed of domestic cat with an unusual "bobbed" tail more closely resembling the tail of a rabbit than that of other cats. The variety is native to Japan and Southeast Asia, though it is now found throughout the world. The breed has been known in Japan for centuries, and it frequently appears in traditional folklore and art. Short Hair • Brown • White • Cute Caption Japanese Bobtail Cute Cat DBTFGFUDIJOHBUFWFSZPO$SFBUF     

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DBTFGFUDIJOHBUFWFSZPO$SFBUF       Cute Cat

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DBTFGFUDIJOHBUFWFSZPO$SFBUF       Cute Cat    

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DBTFGFUDIJOHBUFWFSZPO$SFBUF       Cute Cat     

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 Cute Cat DBTFGFUDIJOHBUFWFSZPO$SFBUF           

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DBTF EJTQPTJOHJOXSPOHXBZ

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 DBTFEJTQPTJOHJOXSPOHXBZ Cute Cat Cute Cat

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Cute Cat Cute Cat  DBTFEJTQPTJOHJOXSPOHXBZ 

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Cute Cat Cute Cat  DBTFEJTQPTJOHJOXSPOHXBZ  

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The Japanese Bobtail is a breed of domestic cat with an unusual "bobbed" tail more closely resembling the tail of a rabbit than that of other cats. The variety is native to Japan and Southeast Asia, though it is now found throughout the world. The breed has been known in Japan for centuries, and it frequently appears in traditional folklore and art. Short Hair • Brown • White • Cute Caption Japanese Bobtail Cute Cat  DBTFEJTQPTJOHJOXSPOHXBZ       

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The Japanese Bobtail is a breed of domestic cat with an unusual "bobbed" tail more closely resembling the tail of a rabbit than that of other cats. The variety is native to Japan and Southeast Asia, though it is now found throughout the world. The breed has been known in Japan for centuries, and it frequently appears in traditional folklore and art. Short Hair • Brown • White • Cute Caption Japanese Bobtail Cute Cat  DBTFEJTQPTJOHJOXSPOHXBZ        

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Cute Cat Cute Cat  DBTFEJTQPTJOHJOXSPOHXBZ    

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Cute Cat Cute Cat  DBTFEJTQPTJOHJOXSPOHXBZ     

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4P XIBUXFTIPVE

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DBTFUPVDIJOHEFTUSPZFE7JFX DBTFGFUDIJOHBUFWFSZPO$SFBUF DBTFEJTQPTJOHJOXSPOHXBZ

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DBTFUPVDIJOHEFTUSPZFE7JFX DBTFGFUDIJOHBUFWFSZPO$SFBUF DBTFEJTQPTJOHJOXSPOHXBZ -JWF%BUB 7JFX.PEFMT -JWF%BUB7JFX.PEFMT

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-JGFDZDMF0CTFSWFS

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 

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   

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       

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TVCTDSJCF TVCTDSJCF        

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TVCTDSJCF TVCTDSJCF         FWFOUIBQQFOT

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SFFWFOUT SFFWFOUT         FWFOUIBQQFOT

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 

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  

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   

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   

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  

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   

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    

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     

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         

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       

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        &WFOU$IBOOFM

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        1VCMJTIFS

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     

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-JGFDZDMF0CTFSWFS ٥0CTFSWFMJGFDZDMFT ٥%FTJHOFEBT1VC4VC ٥#PJMFSQMBUFGSFF ٥-JGFDZDMF"XBSF$PNQPOFOU

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-JWF%BUB

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   

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      

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        

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  

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   

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      

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       

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        0O4UBSUFE 0O3FTVNFE

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         0O4UBSUFE 0O3FTVNFE

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         0O1BVTFE

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         0O1BVTFE #MPDL

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         0O%FTUSPZFE

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         0O%FTUSPZFE

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-JWF%BUB ٥0CTFSWBCMFEBUBIPMEFS ٥-JGFDZDMF"XBSF ٥/PMFBL

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7JFX.PEFM

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   

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    

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     

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      

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     

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      

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       

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dependencies { implementation ﬁleTree(dir: 'libs', include: ['*.jar']) implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" implementation 'androidx.appcompat:appcompat:1.0.0-rc02' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' } -JGFDZDMFT

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dependencies { … def lifecycle_version = "2.0.0-rc01" implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version" } -JWF%BUB7JFX.PEFM

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apply plugin : 'kotlin-kapt' dependencies { … def lifecycle_version = "2.0.0-rc01" implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version" kapt "androidx.lifecycle:lifecycle-compiler:$lifecycle_version" } -JGFDZDMF0CTFSWFS

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dependencies { ... implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:0.22.5" implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:0.22.5" implementation "com.squareup.okhttp3:okhttp:3.10.0" implementation "com.squareup.okhttp3:logging-interceptor:3.10.0" implementation "com.squareup.retrofit2:retrofit:2.4.0" implementation "com.squareup.retrofit2:converter-gson:2.4.0" implementation 'com.jakewharton.retrofit:retrofit2-kotlin-coroutines-experimental-adapter:1.0.0' implementation 'com.google.code.gson:gson:2.8.2' implementation 'androidx.recyclerview:recyclerview:1.0.0-rc02' } kotlin { experimental { coroutines "enable" } }

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TUFQ $SFBUFDPNQPOFOUT

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class YourViewModel : ViewModel() { }

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class YourViewModel : ViewModel() { }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() val repositories : LiveData> }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() val repositories : LiveData> get() { if (_repos.value == null) { val repos = github.repositories() _repos.postValue(repos) } return _repos } }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() val repositories : LiveData> get() { if (_repos.value == null) { // Coroutine way launch(CommonPool) { val repos = github.repositories().await() _repos.postValue(repos) } } return _repos } }

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class YourViewModel : ViewModel() { private val _repos = MutableLiveData>() val repositories : LiveData> get() { if (_repos.value == null) { // Rx way github.repositories() .observeOn(AndroidSchedulers.mainThread()) .subscribeOn(Schedulers.io()) .subscribe { repositories.postValue(it) } } return _repos } }

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class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { ... val viewModel = ViewModelProviders.of(this)[YourViewModel::class.java] } }

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class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { ... val viewModel = ViewModelProviders.of(this)[YourViewModel::class.java] viewModel.repositories.observe(this, Observer { // update Views }) } }

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