I-Dalvik Virtual Machine (i-DVM) ngumatshini wenyani we-android olungiselelwe izixhobo eziphathwayo. Ikhulisa umatshini wenyani wememori, ubomi bebhetri kunye nokusebenza. … dex ifayile esebenza kwi Dalvik VM. Iifayile ezininzi zeklasi ziguqulwa zibe yifayile ye-dex enye.
Yeyiphi eyona njongo ye-DVM kuqala ichaze ukuba yintoni i-DVM kwaye kutheni yadalwa?
Ukusuka kwi-Android 2.2 SDK Dalvik ine-JIT yayo (ngexesha nje) compiler. I-DVM iye yaba yenzelwe ukuba isixhobo sisebenze imizekelo emininzi yoMatshini obonakalayo ngempumelelo. Izicelo zinikwa ngokwazo iimeko.
Kutheni i-Dalvik VM isetyenziswa kwi-android?
Yonke inkqubo ye-Android iqhuba kwinkqubo yayo, kunye nomzekelo wayo womatshini we-Dalvik. I-Dalvik ibhaliwe ukwenzela ukuba isixhobo sinokuqhuba ii-VM ezininzi ngokufanelekileyo. I-Dalvik VM yenza iifayile kwiDalvik Ephunyeziweyo (. dex) ifomathi eyenzelwe ukugcinwa kwenkumbulo encinci.
Yintoni umatshini weDalvik obonakalayo kwaye uchaze ukuba usebenza njani?
Umatshini weDalvik Runtime Virtual iguqula i-bytecode ngalo lonke ixesha isicelo sisungulwa. Kwelinye icala, i-Android Runtime iguqula i-bytecode kube kanye kuphela ngexesha lokufakwa kwesicelo. Ingumatshini oqinisekileyo ozinzileyo kwaye ovavanywe ixesha. Ilingelwe kakhulu kwaye intsha. I-DVM lukhetho lwabaphuhlisi be-Android.
Yintoni eyona njongo ye-DVM?
I-Dalvik Virtual Machine (i-DVM) ngumatshini wenyani we-android olungiselelwe izixhobo eziphathwayo. Yona ikhulisa umatshini wenyani wenkumbulo, ubomi bebhetri kunye nokusebenza.
Yintoni umahluko phakathi kwe-JVM kunye ne-DVM?
Ikhowudi yeJava iqulunqwe ngaphakathi kwi-JVM ukuya kwifomati ephakathi ebizwa ngokuba yi-Java bytecode (. … Emva koko, i-JVM yahlula isiphumo se-Java bytecode kwaye iyiguqulele kwikhowudi yomatshini. Kwisixhobo se-Android, i-DVM iqokelela ikhowudi yeJava kwifomati ephakathi ebizwa ngokuba yiJava bytecode (. ifayile yeklasi) njengeJVM.
Ngaba i-ART yi-JVM?
iifomati zokubini ziyahluka; Dalvik/I-ART ayivelisi i-JVM ibhayithi inqanaba lolwimi liyohluka; ngokuyinxenye sisiphumo senqaku langaphambili, kuba ukuze kuxhaswe inqanaba lolwimi olunikiweyo, i-Dalvik/ART kufuneka iphinde izalisekise yonke imveliso yokwahlulahlula/i-bytecode ukuze ilingane ne-VM yayo.
Yintoni umahluko phakathi kwe-JIT kunye ne-AOT?
I-JIT ikhuphela umqokeleli kwaye iqulunqe ikhowudi kanye phambi kokuBonisa kwisikhangeli. I-AOT sele ihambelane nekhowudi ngelixa usakha isicelo sakho, ngoko ke akufuneki ukuba iqokelele ngexesha lokusebenza. Ilayisha kwiJIT icotha kune i-AOT kuba ifuna ukuqokelela isicelo sakho ngexesha lokusebenza.
Ngaba uDalvik yi-JVM?
I-compact Dalvik ifomathi ephunyeziweyo yenzelwe iinkqubo ezithintelweyo ngokwememori kunye nesantya seprosesa.
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Dalvik (isoftware)
| Umbhali woqobo (aba) | UDan Bornstein |
|---|---|
| uhlobo | Umatshini ochanekileyo |
| ilayisensi | Ilayisensi ye-Apache 2.0 |
| website | umthombo.android.com/devices/tech/dalvik/index.html |
Yiyiphi iVM esebenzisa i-Android?
Android Runtime (ART) yindawo yokusebenza yesicelo esetyenziswa yinkqubo yokusebenza ye-Android. Ukutshintsha i-Dalvik, inkqubo ye-virtual machine esetyenziswe ekuqaleni yi-Android, i-ART yenza ukuguqulelwa kwe-bytecode yesicelo kwimiyalelo yendabuko ethi kamva iqhutywe yimeko yendawo yokusebenza yesixhobo.
Leliphi icandelo eliphambili kwi-Android?
Usetyenziso lwe-Android lwahlulahlulwe lwaba ngamacandelo amane aphambili: imisebenzi, iinkonzo, ababoneleli bomxholo, nabamkeli bosasazo. Ukusondela kwi-Android ukusuka kula macandelo amane kunika umphuhlisi ithuba lokukhuphisana ukuba abe yi-trendsetter kuphuhliso lwesicelo seselula.