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RxJava ೖ
Droid Girls Meetup #6
ࠇ ༸ (@hydrakecat)
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3Y+BWBהכ
▸ 3Y 3FBDUJWF&YUFOTJPO
ך+BWB㹋鄲
▸ ➭ח$װ+4זוד㹋鄲ָ֮
▸ 嚊䙀װ欽铂ָ♧筰זךד鎉铂ָ㢌ג椚鍑׃
װְׅ
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3Y+BWBהכ
▸ ꬊず劍Ⳣ椚䪔ֲךٓ؎ـٓٔ
▸ طحزٙ٦ؙ鸐⥋ծ%#㉏ְさׇ
▸ 6*؎كٝز
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3Y+BWB
▸ 3Y+BWBכY禸הY禸ד㣐ֹֻ麩ְתׅ
▸ 欽铂ծⵖꣲծؔلٖ٦ةזו
▸ ➙㔐כ3Y+BWB⢪ְתׅ
▸ ָծֿתד麩ְ孡ח׃זֻג㣐♱㣗דׅ
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3Yך嚊䙀
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؎كٝزח⿾䘔ֽׅ#
service.contributors(new NetworkCall.Listener>()
{
@Override public void success(List data) {
runOnUiThread(() -> {
if (!isDestroyed()) {
adapter.setContributors(data);
}
});
}
@Override public void failure(Throwable t) {}
});
3Yך؝خ
أٖحس䭷㹀
ٓ؎ؿ؟؎ؙٕثؑحؙ
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؎كٝزח⿾䘔ֽׅ#
3Yך؝خ
service.contributors()
…
.subscribe(
data -> adapter.setContributors(data),
throwable -> Log.e(TAG, throwable.getMessage())
);
וֲ⿾䘔ַֽׅ剅ֻ
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؎كٝزח⿾䘔ֽׅ#
3Yך؝خ
service.contributors()
…
.subscribe(
data -> adapter.setContributors(data),
throwable -> Log.e(TAG, throwable.getMessage())
);
ֿֿחאְגכ䖓鶢
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3Yך嚊䙀
{
Observable
# Observer
subscribe
emit
emit
emit
Event
subscribeঢ়گΛཧ͢Δͷ = Disposable
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0CTFSWBCMF
‣ &WFOUוֲFNJUַׅ㹀
‣ 荈ⴓד⡲ֿהכ֮תזְ
‣ طحزٙ٦ؙ鸐⥋̔3FUSPU
‣ 6*؎كٝز̔3Y#JOEJOH
// 1ඵ͝ͱʹLongܕͷΠϕϯτ͕emit͞ΕΔʢ1, 2, 3, …ʣ
Observable.interval(1, TimeUnit.SECONDS);
// Ϧετͷཁૉ͕1ͭͣͭemit͞ΕΔ
Observable.fromIterable(list);
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0CTFSWFS
‣ ؎كٝز「ֽ《גוֲ⿾䘔ַׅ㹀
‣ 0CTFSWBCMFTVCTDSJCF
ך䒷侧ח♷ִ
‣ ؎كٝز׀הח؝٦ٕغحًؙاحسָㄎל
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0CTFSWFS
service.contributors(owner, repository)
.subscribe(new Observer>() {
@Override public void onSubscribe(Disposable d) {
}
@Override public void onNext(List contributors) {
}
@Override public void onError(Throwable e) {
}
@Override public void onComplete() {
}
});
TVCTDSJCFׁ
FWFOU「ֽ《
ؒٓ٦ָ饯ֹ
ֿ⟃♳FWFOUָזְ
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service.contributors(owner, repository)
.subscribe(new DefaultObserver>() {
@Override public void onNext(List contributors) {
}
@Override public void onError(Throwable e) {
}
@Override public void onComplete() {
}
});
0CTFSWFS
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service.contributors(owner, repository)
.subscribe(
contributors -> {},
throwable -> {},
() -> {}
);
0CTFSWFS
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圫ղז0CTFSWBCMF
‣ PO/FYU
ָ⡦㔐ㄎלגPO$PNQMFUFE
כ宕黅
חㄎלזְ
‣ PO/FYU
ָ㔐ֽㄎלג湫䖓חPO$PNQMFUFE
DPNQMFUFE
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圫ղז0CTFSWBCMF
‣ PO/FYU
ָ㔐ㄎל׆חPO&SSPS
ָㄎל
FSSPS
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%JTQPTBCMF
‣ TVCTDSJCFך朐䡾盖椚
‣ 0CTFSWBCMFTVCTDSJCF
ך䨱⦼
‣ %JTQPTBCMFEJTQPTF
ㄎעהծ
⟃꣬כ0CTFSWFSכ؎كٝز「ֽ《זְ
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%JTQPTBCMF
@Override protected void onCreate(Bundle savedInstanceState) {
…
disposable = service.contributors(owner, repository)
.subscribe(
contributors -> {},
throwable -> {},
() -> {}
);
}
@Override protected void onDestroy() {
super.onDestroy();
if (disposable != null) {
disposable.dispose();
}
}
ֿ⟃꣬כ؎كٝز「ֽ《זְ
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%JTQPTBCMF
‣ "OESPJEדכTVCTDSJCFהEJTQPTFך㜥䨽ָٓ؎
ؿ؟؎ؙٕ♳ד㼎獥חז״ֲחׅ
‣ TVCTDSJCFPO$SFBUF
EJTQPTFPO%FTUSPZ
‣ TVCTDSJCFPO4UBSU
EJTQPTFPO4UPQ
‣ TVCTDSJCFPO"UUBDIFE5P8JOEPX
EJTQPTFPO%FUBDIFE'SPN8JOEPX
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3Yך؝خ
0CTFSWBCMF㢌䳔׃גְֻؔلٖ٦ة黝欽ׅ
ֿהדծ実0CTFSWBCMFחׅ
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تـٕةحف嗚⳿׃ְ
= Operator
0QFSBUPS
ྡΓ߹͏Πϕϯτ͕Ұఆ࣌ؒҎ
ͩͬͨΒΠϕϯτΛemit͢ΔΑ͏ͳObservable
ʹม͢Δ
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圫ղז0QFSBUPS
▸ MUFS
▸ 勴⟝ח֮؎كٝزֽ鸐ׅ
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圫ղז0QFSBUPS
▸ UBLF
▸ ؎كٝز⯓걧ַ䭷㹀ׁ侧ֽ鸐ׅ
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圫ղז0QFSBUPS
▸ NBQ
▸ ؎كٝز㢌䳔ׅ
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圫ղז0QFSBUPS
▸ BU.BQ
▸ ؎كٝزאאַ倜ח0CTFSWBCMF⡲
ծַֿFNJUׁ؎كٝزתה
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NBQהBU.BQך⢪ְⴓֽ
‣ ♧菙涸ח㢌䳔䖓ך؎كٝزָ0CTFSWBCMFחזז
BU.BQ⢪ֲ
‣ ⢽Ⰵ㶨ךطحزٙ٦ؙ鸐⥋
‣ ⢽ٔأز㾜ׅ
service.items()
.flatMap(item -> service.user(item.getUser()))
service.usersList()
.flatMap(users -> Observable.fromIterable(users))
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NBQהBU.BQך⢪ְⴓֽ
‣ ֲדזְזNBQ⢪ֲ
‣ ⢽ٔأزך"EBQUFS欽חؔـآؙؑز㢌䳔
service.users()
.map(user -> new Contributor(user.getLogin(), user.getName()))
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圫ղז0QFSBUPS
▸ DPNCJOF-BUFTU
▸ 醱侧ך0CTFSWBCMFךֲծוַָֿ؎كٝز
FNJU׃ծ➭ך0CTFSWBCMFך剑倜ך؎كٝ
زהさׇ؎كٝزFNJUׅ
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圫ղז0QFSBUPS
▸ DPNCJOF-BUFTU
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圫ղז0QFSBUPS
▸ TVCTDSJCF0O
▸ ؎كٝزFNJUׅהֹךأٖحس㢌刿ׅ
service.contributors(owner, repository)
.subscribeOn(Schedulers.io())
طحزٙ٦ؙ鸐⥋ً؎ٝأٖحسהⴽךأٖحسד遤ֲ
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圫ղז0QFSBUPS
▸ TVCTDSJCF0O
▸ ؎كٝزFNJUׅהֹךأٖحس㢌刿ׅ
▸ 姻然חכ׳ה麩ְתָׅծהִ֮׆כֿ
ְֲֲ椚鍑ד$
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圫ղז0QFSBUPS
▸ PCTFSWF0O
▸ ؎كٝز「ֽ《הֹךأٖحس㢌刿ׅ
service.contributors(owner, repository)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(contributors -> { … })
TVCTDSJCF
ⰻד遤ֲⳢ椚ً؎ٝأٖحسד遤ֲ
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圫ղז0QFSBUPS
▸ GSPN*UFSBCMF
▸ ٔأز*UFSBCMFַ0CTFSWBCMF⡲
FromIterable
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圫ղז0QFSBUPS
▸ UP-JTU
▸ ؎كٝزⰋ鿇תהג-JTUחׅ
toList
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3Yך؝خ
▸ ؿؑ٦أחⴓֽג罋ִ
▸ ر٦ةך崧ת׆㹀纏
▸ 0CTFSWBCMF欽䠐׃ծPQFSBUPS籬ְד
וֲ㢌䳔ַׅ䭷爙ׅ
▸ ر٦ة崧ׅ
▸ TVCTDSJCFׅ
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Pipes by Domiriel CC BY-NC 2.0
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״ֻ֮麩ְ
‣ 0CTFSWBCMF⡲ծּׅחFWFOUָFNJUׁ
Observable> o = service.contributors();
תطحزٙ٦ؙ鸐⥋כ
饯ֹזְ
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״ֻ֮麩ְ
‣ 0CTFSWBCMF⡲ծּׅחFWFOUָFNJUׁ
Observable> o = service.contributors();
o.subscribe(contributors -> {}, throwable -> {}, () -> {});
طحزٙ٦ؙ鸐⥋ָ饯ֹ
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״ֻ֮麩ְ
‣ 0CTFSWBCMF⡲ծּׅחFWFOUָFNJUׁ
‣ 0CTFSWBCMFָⰟ剣ׁ
Observable> o = service.contributors();
o.subscribe(contributors -> {}, throwable -> {}, () -> {});
o.subscribe(contributors -> {}, throwable -> {}, () -> {});
طحزٙ٦ؙ鸐⥋ָ饯ֹさ鎘㔐
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رغحؚך؝خ
▸ EP0O&BDIؔلٖ٦ةⵃ欽ׅ
service.contributors(owner, repository)
.doOnEach(event -> Log.d(TAG, "event: " + event))
.flatMap(…)
.map(…)
…
MainActivity D notification: OnNextNotification[[…]]
MainActivity D notification: OnCompleteNotification
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➙傈鑧ׁזַֿה
▸ 4JOHMF
.BZCF
$PNQMFUBCMF
▸ )PU0CTFSWBCMFה$PME0CTFSWBCMF
▸ 4VCKFDU
▸ 'MPXBCMFה0CTFSWBCMFך麩ְ
▸ #BDLQSFTTVSFהכ
▸ ذأز
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罋俑柃
‣ IUUQSFBDUJWFYJP
‣ IUUQSYXJLJXJLJEPUDPNTBNQMFT
‣ ˑ3FBDUJWF1SPHSBNNJOHXJUI3Y+BWB$SFBUJOH
"TZODISPOPVT
&WFOU#BTFE"QQMJDBUJPOT˒
5PNBT[/VSLJFXJD[
#FO$ISJTUFOTFO