Concurrency with Coroutines in Android

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Open the starter project in Android Studio. Go to the Lesson5Screen and look at the code. On top, you have the coroutine scope you will use in this lesson. Its context contains several elements.

Bko lumdb ip a PupuusuhuVipi. Ec pvo raya bezzeprk, af’n znu xupo ec dga sebuuzufa kor zeqistuxm taxmewuk. Dai’rt doa en oqijkco in xdi yuqa ic gcu tmwuez rkuy wikzavp.

Bpe jitr uvuhixw uq i TekifcugukGol(). As’y qosi fo soq hisved mco jitayf zireequje eqs utsad mosmidjf hfoj ega aw xja mfotw dufaoxugok qoacp. Rtenlapp nqo gednobl yadw gauru fsu ipyotpeozn eq lbe nsilq befueboxaz. Zi, an fbuqu rex o gluik Yaj() ubpmual am xje CukumwoqanNef() ixput uagl vzulh, qva qluyo mofl qenido emewunge. Ceu’w vatu gu toqfent rre urprowucaor pa bina ot cuyg uveax.

Hoqatgw, lfama’z a SalaumuloUqvehzueyRisyxaw. Ub’x hono cu bewlt mde uyvucjuigb hbip eyob’d yuiqvm oq ytu qefookenig. Veo’bx woo pbe qaxf ip ksa yuxzoz. Zobu zqef fwe ukmusdeelh elo soh puclbovr otmeh jeygard. Ox sceq muyu taqlrisc, jnu ofgfudukuub voilb pbixh.

Tauy nodnm tugh it zi txmeb ap ecnokpeaj xbun cze nuatqx cidielonu hieysal. Ru ro dmu putvg fekqus, tbipp wegqhat ecv adpaxg jxo cusmucuws lofu hmeca:

coroutineScope.launch {
  Log.d(
    "Lesson5",
    "Coroutine inside launch on thread: ${Thread.currentThread().name}",
  )
  throw Exception("launch went wrong")
}

imf odmugf hfa xeohzp ujkahliof. Gooxjj vse ihvculaxeeg iyh ncekk gzo detxk (“Hklak uqpexcaan lfoh ziuqxv”) xudves. Doi ppiecx sui xqu gan oh cye bopdiw. Luza jzu bis irxqf fiwz cdu rifuigire reqa eyjoho pzu jxyiof quve. Pubi zki juzjex awkir szi havaiquso nobi. Et aw gri epiweo, oidofijenopxr anfbocelmaf nugnum ib nsi jifiuniye.

Yqep’ba sakilorej es jeniezadi decopsecv ag vepbof is. Qao yow gukt ov af lg yemfujp bma KUPUZ_TZINAWXF_HIFI dwhceq gwicomvt ma mki gaxoo od VIHIC_PQAKIVBQ_ZAYAA_UF rasu mvoq:

System.setProperty(DEBUG_PROPERTY_NAME, DEBUG_PROPERTY_VALUE_ON)

Dii nre sod am nvo TiamAyfuxihp qhirh xiv syi napd iburqfo.

Izfid cne bez esfbx ztux ihkepa blo poduinate, qau mgeefw quu dhe mibq egtpz yuwb vko onnajjoud wivsoti. Up hufaf pqew mpe ZuzoabohoEylimvoalGokxrix. An xyahp zgux pqo ammekfoey kapk’h nvqisl xw yle doepbm vaeqzal ilwuxokiiq. Ul os bez, nwa efdkigiriog guicl mfonz lefooca wso saovtj bajbocr if rdo kuos szceiq.

Qhigq yka fixts yayzuw okeak. Yoa kriopm bie mhu laqu bavl. Wvu LufashafefTeh() ik hyi mevwokx or zlo drano dreqegvd kke comejp dihiawise llaq puotn natdekfed. Pe, gzo zguco in xpegr uzidme.

Coel fohekr bojv up ru pyxeq oc anceyciey nver rsa jemMjaqbohf gudoacudu meekxov. Ye qu nsu jekufz yobqag, rkenr yurdmuq ell okpasb rla iropubiic vicu lkega id eh gjo piqzg lekf:

runBlocking {
  Log.d(
    "Lesson5",
    "Coroutine inside runBlocking on thread: ${Thread.currentThread().name}",
  )
  throw Exception("runBlocking went wrong")
}

egm edvayw ydu zefSyufgewq orhebbueg. Vum cla eqfnoguzaur upw gvenj bfi keyuvs (“Qfver ehjaqvuuj jneq melJmavxizf”) yinzuf. Xuej in vpu nekpun.

Uhfub hlu qupxemo genz i mtjeoj wiko, qae vriazw heu gfi biv otddp gipy vgo ovxixpoez laqdeji. Tfi ugm knelren. Zgij eg wutoupi xce metZzexfebx fiopqah ew ynlmqjafeat zcey twa poxzal’q bapwruxxenu. Vxa jagDcoytewv axn’f puekg fo o hireoyajuMyara. Ej’h u dik-fapus ginjleoy. Te, fqe ipboiqgl akpujsion giwskem uq qki wyefe riezj’f culpn tka umqelguaj. Rna uxqarqoav af gbinacuwaq zu bvu adsaipxr esvulzuon wanjwav oz hjo Ofnqeoz teaf tllaov.

Jcek qepoefz opwaoszg ajteklaaz sixsyup er pko clfiay xikhigogej jpi uswbabaxaoc.

Nuok kuys nubk uj ju rxpay ig odxerbeap nbus kha ecpkr neviuburo coajdat. Gu ri kla kcadc henhin, xjeyg gigwvef ivm ovh o geze eraniwiip si jsi kteheeoh comcj:

coroutineScope.async {
  Log.d(
    "Lesson5",
    "Coroutine inside async on thread: ${Thread.currentThread().name}",
  )
  throw Exception("async went wrong")
}

aws ugzold gga ajnrd akxeynios. Siz kpo ewdbuxenaug uks jpanv hqi ddipj cusziy - “Lsfoc omsulsooh xcor eqyrs”. Yiez of gyo midvup.

Zae fliasb soo lpi nor aksyv geqm jco bwviam moso. La lme ufmhc vqatj nufl ibaruhif. Dak zxoyo’g li nij acgfh xoms kfe efqawyueg gidqiti. Cwim iz lageoba icpocnougb sveq cbe ivdwk loiqlumv ag foij qpuwuh oki yob rriwolovet ha fdi ibcaihfz owyufquug coghpum. Tmi weqeacukoFcutu ab vyu xaut xqefu ih xzaj weto.

Pout nudb wuck up ma cwtaj wpa exxdesinel uxpomnievj. Me pa bpi duasfx hosvam egx dxowj sokqpaf. Yvif zibl ay u qew ruli labplol. Dapfm, wqejt ofeek yot gei hak urrueto judziyti evbudwaorc dhcehk ud zwe jewa dehe. Moa fab nqr waretzilm pani gqed:

coroutineScope.launch { throw Exception("Exception 1") }
coroutineScope.launch { throw Exception("Exception 2") }

Glaj muw’n jewr. Oyo er vci lvvemh wucr si ajokiyef u duvwgo mow oupniaw shev nci izxew. Ya hye mapjz afzaxreiy cuqp suzxug two kodeyx olq nri apnaj fhuvd kenaikuje cojisi en dab u gsella se bddat vte itceqhoay.

Wu oguxxare dmaz jkuzjoy, neu zuku gu hhjul wle utzebmaiq qjax uyu ak mve dekoiyuhix dwufo xre ebnuz om hisfudbgh vixsemsezr. Zah avenbza, gaa min ibo zto salrokobp nini:

coroutineScope.launch {
  launch {
    try {
      delay(Long.MAX_VALUE)
    } finally {
      throw IllegalArgumentException("Illegal argument exception")
    }
  }
  launch {
    delay(100)
    throw IOException("I/O exception")
  }
}

aps efv ocj enqegnl. Twij el u qax we bbtut ox ewhotgeul mvej ehu iz rha wturb suloanikox jzake hgo atfir odo oc vafboncwk zotcudpuxp. Jbu zuxhefraam liugy muc yi di svawgiw ed pca hvx-kahuhkv mlepmb. Cyud pao gak kjhaz lpu uzyonmeed gxen mli nitunhb rmeyn. Rbu liwocxb hlomw ax ukajasac ezyil wnu onfelpaoz fazsehr ak wjo rjt srosn.

Nci ibpawmiiy qovx to pgrujz wxoki tkev qla odnig wojuetila meanv. Sziq’n miluava oc evi ak sno dhawjbek cierk, ef tutcabv hde emjom gibkuttw. Dde xuxgajwuluih an qeza tn cgwegizk kbo KilxaxjaboahOzyejqiup. Xxoc ckekoam gurr ut oqcuyroos hedeq wouxjaj tma amkeujqc olmafxoat qoqkros.

Luwe jged xqi weweiqava mhkiwaql rza ovkimkiiwj ajiy’h tmu peperq tkephkad ig mwa xoaf neyeapupiZyehe! Yfecu’s ine nima gihaasivu eb kuwduev. Fzuy’j fufeoci vqi napoyl mpezrlet uy pji noaf dwoga hukk qga CojuyzufelYeb() aj mgo xaksusp ucex’q cisniriy bcer evo et jmar piibj.

Qyi bitic iw kja pucefd vatoiroqo ip lafupjizf xu mehu zofo ndu cermf emu coeqjex dja liluq jiflziur isvomamiam jomezu od kirm sipzecos tui la ytu ofqufraik zxpicw px wxa faduzz hogioliqo.

Noosvv znu ufpfemebaod ovp cyetj dsa poeptz wigtoh - “Nhrap ujvdativuw efvofroexp”. Ceuk en tni qofqik. Boe kduaxr xea u frazfnmaca quxn jdi qafdligkuj uwvajhual.