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Ʒ IM rͨӍ֮·

2019-04-10 16:51:44   ߣ   ԴCTIՓ   uՓ0 c(din)


֪IM rͨӍһ(xing)rҪdzߵļg(sh)Ϣr_(d)Ҫl·ôڏ(f)sľW(wng)j(lu)h(hun)͇(ni)׿֙C(j)ȶƻėlα·Ԕư׿ SDK ڻ TCP f(xi)h(sh)F(xin)·̽ͽ(jng)(yn)
IM ϵy(tng)w
ψDʾ˱·һ׳ IM ϵy(tng)һϢ··ɗlLBͨ(dng)Ϣ_(d)rϢ(w)ȕДϢ·ǷϢ·̎ڴB(ti)Ϣ(yu)ȏϢ·°l(f)͑ˣt·ɵͷ(w)·°l(f)
C·漰Ϣ··ɗl·ı@ɗl·ʹÈIJͬϳC(j)ͬģԸвͬČһx
·ıҪ
TCP Socket Bӽ֮κ̎@BӕLrgڲҿÆǷ񶨵ԭЃc(din)
һĬJ(rn)Socket Bӟor̽y·Įrʹ Socket Čԅ(sh) KeepAlive O(sh)Þ True Ȼor@ȡ·B(ti)@?yn)?Socket BӠB(ti)һB(ti)C(j)M(jn)оSo(h)ģBꮅp̎ڽB(ti)ij_(w)?yn)ijЩԭ(q)?f)dor푑(yng)I(y)(w)Ո@r TCP ̽yȻBӠB(ti)(sh)Hϴ·ѽ(jng)
(ni)\(yn)I̵ NAT rC(j)ƕһrg(ni)]Д(sh)(j)BӔ_@rgֻЎ׷h(yun)oM҂LB
ͨñC(j)-C(j)
ԭҪS Socket BLrgҪ(sh)F(xin)ԼıC(j)ͨõһNC(j)ƾC(j)͑ÿһΕrgo(w)l(f)һСĔ(sh)(j)(j)ܷյ(w)푑(yng)Д·Ŀԡ˹(ji)ʡ@һdzС]Ѓ(ni)
ô͑Ό(sh)F(xin)rl(f)أһЃɷNʽ
һNͨ^ Java Timer 팍(sh)F(xin)IJE£
  1. һҪ(zh)е΄(w) TimerTask 
  2. (chung)һ Timer (sh)ͨ^ Timer ṩ schedule TimerTask 뵽r Timer O(sh)ÿһΕrg(zh) TimerTask , TimerTask l(f)@Nʽ(sh)F(xin)^ʡ늣Ҫ WakeLock ȱc(din)Ҳ@Lrgں_M(jn)̱ջϵy(tng)ߺ Timer C(j)S֮ʧЧ
һNʽð׿ϵy(tng)Ķr΄(w) AlarmManager ѭh(hun)(zh)аl(f)΄(w)@Nʽ?yn)ϵy(tng)߶ʧЧϵy(tng)ߺȻͨ^ WakeLock ѣ(zh)΄(w) Timer C(j)@Nʽ^M(fi)늣ʹõĕrһҪעŽc(din)
  • ȸ(j)ʹ AlarmManager [犅(sh)[犸(sh)ą^(q)e±
  • AlarmManager ṩ cancel O(sh)µĶr΄(w)ǰͨ^ cancel ȡϵy(tng)O(sh)õͬ΄(w)O(sh)΄(w)
  • ׿ 6.0 汾 Doze ģʽṩµ[O(sh)÷ setExactAndAllowWhileIdle ͨ^ԓO(sh)õ[犕rgϵy(tng){(dio)(yng)O(sh)õ„(w)y(tng)һһΆ̎_(d)ʡ늵Ŀġ]ڰ׿ 6.0 ϵy(tng)(yu)ʹԓ
Ϣ·C(j)
Ϣ·հl(f)ϢҪͨҪ̶ȱ·Ŀ·û߮_rܼr̽yBȱϙC(j)Ϣ·ǰfC(j)߀So(h)˃·(yu)C(j)ƣ(f)BәC(j)ƺBC(j)
(f)BәC(j)ƵĻE£
  1. ͑Bӌ(do)(w)(do)(w)°l(f)(yng)Ì(yng)ϢаBӷ(w)ĵַб
  2. ͑ˏĵһ(w)ַLԇBӣӳrC(j)Bʧ]мrյ(w)푑(yng) t^m(x)LԇBһֱɹBӣɹBӵĵַ浽(yu)ַBӕr(yu)ʹô˵ַͨ^@NC(j)ܱϿ͑˃(yu)x(yu)·sBӕrg
BC(j)tָI(y)(w)ڙzyc(w)BӔ_Lԇ N Bӷ(w)״Δ_ 1 BȻBӲɹ 2 BgrgϴBgrg 2  LԇBӷ(w)ԴƮ(dng)LԇB N κȻBϷ(w)هLԇBֻھW(wng)j(lu)rl(f)׃´_(yng)Õrŕٴ·LԇB
·C(j)
·Ϣ_(d)a(b)ֶҪMLں_ĴrgʹȻܱٴΆ iOS ֙C(j) APNS _(d)Ч׿Ĺٷϵy(tng) FCM ڇ(ni)ڇ(ni)׿ϵy(tng)α͵_(d)أۂҪ˽°׿ϵy(tng)M(jn)̹ăɴC(j)ƣ
һN LMK C(j)Ӣ Low Memory Killer , Linux ă(ni)C(j)Ҫͨ^M(jn)̵ oom_adj ֵжM(jn)̵Ҫ̶ĶQǷ@ЩM(jn)̡ oom_adj ֵԽҪԽߣ native M(jn) framework ӆӵϵy(tng)M(jn)(yu)ȼһ㶼ؓ(f)(sh)ǰ_ҊM(jn)̣ϵy(tng)ҲȻҊM(jn)˵_ oom_adj ֵߣϵy(tng)rr
һNC(j)ǰ׿ԭę(qun)޹C(j)ƣ AppOps Sڴ˻A(ch)M(jn)ȶƻС׵İȫģA֙C(j)ܼҵÁM(jn)Й(qun)޹ԓ(qun)޹C(j)\(yn)ڰ׿ϵy(tng)Ŀ܌όӸ(yng)õM(jn)Lԇ†ӣϵy(tng)ȕȥ(qun)޹ęzԓM(jn)Л]Ԇә(qun)Ŝ(zhn)膢tĿ܌ֱϵy(tng)Ć
σɷNC(j)·ıҲɷ֞ɴ
һM(jn)̱˼·Ǹ(j) LMK C(j)M(jn)̃(yu)ȼͱĎҪŽ׷N
  • O(jin) ¼ 1 ͸ Activity ʹ(yng)M(jn)D(zhun)ҕM(jn)̣ͱĻ?x)rP(gun)]ԓ Activity 
  • p(w)o(h) A (w) startForeground ʽl(f)һ֪ͨ B (w)ͬ  startForeground ʽҰl(f)ͺ A ͬ ID ֪ͨȻ B (w){(dio) stopForeground ȡ֪ͨ@ A (w)͕ǰ_M(jn)̵ʽҲӰÑ֪
  • (j)ļiԭO(jin)ҕ Java  M(jn)̴B(ti) Linux ӳɹļtͨ^ exec _һ Linux ĿɈ(zh)ļ_һ Daemon M(jn)̣ ԓM(jn)?yn)?Linux ӆڰ׿ 5.0 ֮ǰ(yu)ȼ^ߣڰ׿ 5.0 ֮ԓʽЧ
M(jn)IJԺͰ׿ϵy(tng) AppOps C(j)P(gun)һŽ׷N
  • Service Sticky ԣ Service onStartCommand з START_STICKY @Ӯ(dng) Service ϵy(tng)ԄӇLԇ؆^ڇ(ni)ƻϵy(tng)@Nʽܳɹ؆ĎʺܵͣҪÑڙ(qun)޹Ĵ_Ԇӵș(qun)ܳɹ
  • Ҳǰv^C(j)ƣ^@Ҫʹ AlarmManager O(sh)  ELAPSED_REALTIME_WAKEUP Ե[ϵy(tng)ߺ󣬲ŕܵ¼ĶM(jn)
  • ͨ^O(jin) W(wng)j(lu)ГQÑО¼M(jn)
  • (yng)gϵy(tng)кÎׂ(yng)üͬһ SDK , ôÑ􆢄ijһ App ĕr SDK ȥ(yng)“ֵܽ” @NʽÑw(yn)dzϵy(tng)Īĺ늡
S׿ϵy(tng)汾ĵ_M(jn)̵ĆӹܿԽԽ(yn)˽Q͵Ć}֙C(j)SƳԼϵy(tng)ͷ(w)ɏS Framework ӽy(tng)һSo(h)һlͨόБ(yng)ùͬʹԓ·ҪپSo(h)Ϊ(d)M(jn)(dng)ǰ֧ϵy(tng)͵ďSУСסA vivo OPPO ɵϵy(tng)֮Ϣհl(f)̿ԅˆD
@Nϵy(tng)eʡ늣ʡ(ni)_(d)ʸߡ(yng)ÿԸ(j)֙C(j)̖IJͬ(yu)ʹÏSϵy(tng)eıC(j)̶ȱ͵ĵ_(d)
؟(z)•ăH߱^c(din)cCTIՓoP(gun)CTIՓ^c(din)Дౣ(ni)ݵĜ(zhn)_ԡɿԻṩκʾʾıCՈx߃HՈгГ(dn)ȫ؟(z)

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