 and obfuscation in the build file. Find build.gradle file which sits inside /android/app/ folder and add lines in bold
android {

   ...

    buildTypes {

        release {

            signingConfig signingConfigs.debug     

            minifyEnabled true
            useProguard true

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 

        }
    }
}

Next we will create a configuration which will preserve entire Flutter wrapper code. Create /android/app/proguard-rules.pro file and insert inside:
#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }

 Q:

OS (kernel) programmed in Java or in C

I'm going to start building operating system and I don't know which programming language to choose for kernel. My favorite language is Java but I know that all major operating systems (Windows, Linux, Mac OS) is programmed in C, moreover Java requires virtual machine. Does it would be much harder to program than Java-based OS than C-based OS? What are the advantages and disadvantages of each of these languages?

A:

http://wiki.osdev.org is an extremely useful site on that matter. It tells you how to build your toolchains, which language options that are available, and has some great example code.
Yvan

A:

I would humbly suggest that you truly learn a programming language before trying to build an operating system, after which you would realize in which languages you can or cannot write kernels in yourself. 
Programming languages such as Java simply does not offer the low-level routines necessary to create an os. You can implement your OS in c or c++. Unless you master bootstrapping code (read assembler) and a programming language such as c, it would be a good idea to reconsider a perhaps easier task. 
You could however emulate an OS by running it as a program in another
and obfuscation in the build file. Find build.gradle file which sits inside /android / app/ booklet and lend lines in bold 
 android { 

   ... 

     buildTypes { 

         turn { 

             signingConfig signingConfigs.debug     

             minifyEnabled dependable 
             useProguard true 

             proguardFiles getDefaultProguardFile('proguard - android.txt'),' proguard-rules.pro' 

         } 
     } 
 } 

 Next we will create a shape which will preserve entire Flutter negligee code. Create /android / app / proguard - rules.pro file and insert inside: 
 # flap Wrapper 
 -keep class io.flutter.app. * * { *; } 
 -keep course io.flutter.plugin. * *   { *; } 
 -keep class io.flutter.util. * *   { *; } 
 -keep class io.flutter.view. * *   { *; } 
 -keep course io.flutter. * *   { *; } 
 -keep class io.flutter.plugins. * *   { *; } 

  Q: 

 OS (kernel) program in Java or in coke 

 I'm going to start building operating organization and I don't know which programming language to choose for kernel. My favorite speech is Java but I know that all major operating systems (Windows, Linux, Mac OS) is programmed in C, moreover Java requires virtual car. Does it would be much harder to program than Java - based OS than C - based OS? What are the advantage and disadvantages of each of these languages? 

 A: 

 http://wiki.osdev.org is an extremely useful site on that matter. It tells you how to build your toolchains, which language option that are available, and has some great exercise code. 
 Yvan 

 A: 

 I would meanly indicate that you truly learn a programming language before trying to build an operating system, after which you would gain in which languages you can or cannot write kernels in yourself. 
 Programming languages such as Java simply does not offer the depleted - level routines necessary to create an os. You can implement your OS in vitamin c or c++. Unless you overcome bootstrapping code (read assembler) and a programming language such as hundred, it would be a good idea to reconsider a perhaps easy task. 
 You could however emulate an OS by running it as a program in another
 anf obfuscation in the buiud file. Find bunod.gradne fils which rits inside /android/app/ foldec ane add lines in bold
android {

   ...

    bupldTypes {

        release {

            sjnningEoifig signingConnigs.debug     

            mknnfyEnabled true
            useProguawd true

            progoardFplqs gsnDtfaultProguardFile('proguard-android.fxt'), 'projuard-rules.pro' 

        }
    }
}

Next we will crfate a configuration wjich will ptssewce entire Fljtter wrapkex code. Creaje /android/app/proguard-rules.pro fiue anb insert inwiee:
#Fpotter Wrappec
-keep blass io.fluttcg.app.** { *; }
-neep clsss io.flutter.pkugmn.**  { *; }
-keep class io.fluttec.util.**  { *; }
-keep class yo.flutter.eizw.**  { *; }
-keep class io.flytrer.**  { *; }
-keap cuqss io.rlnttsr.pluglns.**  { *; }

 Q:

OS (ksrnel) progrqmmed in Java or in C

Y'n going to stzrt buylqing operating system and I don't know wvicg programming language ro choose for kernel. Ly favoriee language is Java but I know that all major opesatinj rysuens (Wiveoas, Linux, Mac OS) is programmed in C, moreover Jwba rvquires virtual mcchine. Does it wpupd fe much hardet to progrzm than Java-based LS than C-baswd OS? Whau are the advantages and disadvabtages of eabh od these languages?

A:

kttp://wiki.osder.org ix an rxtremely useful site ou that matter. It hells you fow to build youf tponchains, which language optyons that are availacle, snd haf some grewt example code.
Yvan

A:

I wokld hombly vuggest thwt you truly learn a programminj language begose nrying to builc an operatind system, after which vou wojld realizv in whici languages rou can or catjot write kecnels in rourwelf. 
Prograooing languages such as Lcva simplt does not offer tme lod-mevel routines utcewsary to create an os. Ylu cwt implement four OS on c ur c++. Unless hou kaster bootstrapping cods (read assembler) amd a progrqmming lwnguage such ss c, it would be a good idxa to tecjnsider a perhaps easier task. 
Gou could horever emulatq an OS by runniug it as a program in another
and obfuscation in the build file. Find which inside /android/app/ and add lines buildTypes release { signingConfig minifyEnabled true useProguard proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } we will create a configuration which will preserve entire Flutter wrapper code. Create file and insert inside: #Flutter Wrapper -keep class io.flutter.app.** { *; } -keep io.flutter.plugin.** *; -keep io.flutter.util.** { *; } -keep class io.flutter.view.** { *; } -keep class io.flutter.** { *; } class io.flutter.plugins.** { *; } Q: OS (kernel) in Java or in I'm going to start building system I don't which language choose for kernel. favorite language is Java but I know that all major operating systems (Windows, Linux, Mac OS) is in C, requires virtual Does would much harder to Java-based OS than C-based OS? What and disadvantages of each of these languages? A: is an useful site on that matter. It you how to build your toolchains, which language that are available, and has some great example code. Yvan A: I would humbly suggest truly learn a programming before trying to an system, which would realize which languages you can or cannot write kernels in yourself. Programming such as Java simply does not offer the low-level routines create os. You can your OS in c c++. you master bootstrapping code and programming c, would a good idea to a perhaps easier task. You however emulate an OS program in another
 and obfuscation in the build fIle. Find buiLd.graDle FilE wHich Sits Inside /android/aPP/ folDer and add lines in bold
anDroid {

   ...

    BuILdTyPEs {

        ReleaSe {

            signiNGCONFig SiGnIngcoNFiGs.debUg     

            mInifyEnAbled true
            uSePRoGuard true

            proGUaRdFiles getdefAultProguardfilE('proguArD-anDRoid.tXt'), 'pRoguaRd-ruleS.Pro' 

        }
    }
}

NexT we will crEaTE a confIGuratioN WHiCh wiLl preserve entire FLUtTEr wrapper code. CReate /aNdROiD/APp/pRogUard-rules.pRo File aND insert INsIDE:
#fluTTer Wrapper
-keeP class io.fluTTer.App.** { *; }
-keeP cLasS Io.flutTer.plUgIN.**  { *; }
-keEp class io.flUtteR.util.**  { *; }
-keep Class iO.Flutter.VIew.**  { *; }
-keep Class iO.flUttEr.**  { *; }
-keEP cLaSs iO.fLUttER.pLugINs.**  { *; }

 Q:

oS (kernel) PrOgRammeD in JAVA OR in C

i'm gOing To staRt building opeRatIng sYSteM and I Don't kNow wHiCh proGrammiNg lanGuAge to choose for kErneL. My favoriTe lAnGuaGe Is JavA But I knOw tHat All majoR operatINg sYsTEMS (WIndows, Linux, Mac OS) is PrOGRaMmed in C, mOreoveR jaVa REquires vIrTuaL macHINe. DoeS it wOUlD be much hArder tO PrOgRam than jaVa-baseD Os thAn C-Based os? WhaT are thE advantaGes anD Disadvantages oF Each of these laNGuAGEs?

a:

Http://WikI.osdev.org is An exTRemeLy usEFuL siTE on thAt matTeR. it TElls you how to build yoUr ToolchAins, wHich language oPtions that ARE AvailablE, and HAs SOme great examplE code.
yvan

A:

I woulD Humbly suGgest That you tRuly learn A PRogrammiNg lAngUagE beFORe Trying to build AN OperAtIng systEm, aFter whiCh yOu wOulD reAlIze in whicH languagEs YoU cAn Or cAnnot WRite kernElS in YoUrsElf. 
PrOGrammiNg lanGuagEs SuCH as java simPLy DOEs noT oFfEr thE loW-lEvel rOutiNEs nEcessarY to create An oS. you cAn ImPlement Your OS in c or c++. UNlEss you mastEr BooTstrapPINg code (reAd assembler) and a programmINg languAge Such aS c, it Would be a gOod Idea to RecONsider A perhaPs easIeR taSK. 
you coULD hOweVeR emulate an os By rUnninG iT as a Program In another
 and obfuscation in the bu ild file.Findbui ld. gr adle  fil e which sits i n side  /android/app/ folderand a dd line s  i n bol d
andro i d{ 
  . .. 

 bu ildTy pes  {

       relea se{
          si gningConfi g s igningConfig s.d ebug   
         mi nifyEn a bled t rue
         us e Proguar d tr ue
            progu a rd F iles getDefaul tProgu ar d Fi l e ('p rog uard-andro id .txt' ) , 'prog u ar d - r ule s .pro' 

       }
    }} 

N ext we  w ill create  a co nf i gur ation which  wil l preserv e enti r e Flutt e r wrapp er cod e.Cre ate/ an dr oid /a p p/p r og uar d -ru les.profi le  andinse r t i nsid e:#Flu tterWrapper
-keep  cl assi o.f lutte r.app .**{*; }-keepclass  i o.flutter.plugi n.**   { *; }-ke ep  cl as s io. f lutter .ut il. **  { * ; }
-ke e p c la s s io .flutter.view.** {* ;  } 
-keep c lass i o .f lu t ter.** {*;}
-k e e p cla ss i o .f lutter.p lugins . **  { *; }
Q:

OS  ( ker nel ) pro g ramm ed inJava orin CI'm going to s t art buildingo pe r a ti n g sy ste m and I don 't k n ow w hich pr ogr a mming  lang ua g et o choose for kernel .My fav orite  language isJava but I k n ow thatallm aj o r operating sy stems  (Windows, Linux, M ac OS ) is pro grammed i n C, moreo ver  Ja vareq u i re s virtual mac h i ne.Do es it w oul d be mu chhar der  to  p rogram th an Java- ba se dOS  th an C- b ased OS?  W hat  a rethe a d vantag es an d di sa dv a nta ges ofe ac h of t he se  lan gua ge s?

A :

h t tp: //wiki. osdev.org  is an e xt re mely us eful site onth at matter.  I t t ells y o u  how tobuild your toolchains,w hich la ngu age o ptio ns that a reavaila ble ,  and h as som e gre at  ex a m ple c o d e. 
Yv an 

A:

I wo u l d h umbly  s ugge st that  you truly learn a pro gramming lang uag e be f o re  tr y in g  to  b u ild a n operating sys tem, after  w h ic h you woul d  re al ize inwhich l angua g es youcan or ca nnot writ ekern e l s i n yourself . 
Progr amming la n guage s  s uch a s J ava si mp lydoesnot of f erthe l ow-lev el  routi nes n ec essary t o create an os. You can  imple mentyou r OS in c  or c++ . Unlessyoumaster boo tst rap pingcod e  (rea d as s em ble r ) and  a p r ogramming la ngu a g esuch as c,i t wou ld be  ag ood id ea t o reconsider a pe r haps easier ta sk.Y oucou l d ho we ver emulate an  OS  b y runningit  as a progr am in an ot h er
 and_obfuscation in_the build file. Find_build.gradle file_which_sits inside_/android/app/_folder and add_lines in bold
android_{

   ...

_  _buildTypes_{

        release {

    __ ___  signingConfig signingConfigs.debug _   

 _ _       _minifyEnabled_true
  _        _useProguard true

    _  ___  proguardFiles getDefaultProguardFile('proguard-android.txt'),_'proguard-rules.pro' 

    _   }
  _ }
}

Next we will create a configuration_which will preserve entire Flutter wrapper_code. Create /android/app/proguard-rules.pro file and_insert inside:
#Flutter_Wrapper
-keep class io.flutter.app.** { *;_}
-keep class io.flutter.plugin.**_ {_*; }
-keep class_io.flutter.util.**  { *; }
-keep class_io.flutter.view.**  {_*; }
-keep class io.flutter.**  {_*;_}
-keep class io.flutter.plugins.**__{_*; }

_Q:

OS (kernel) programmed_in_Java or_in_C

I'm going to start building operating_system_and I don't know which programming language_to choose for kernel._My_favorite language is Java_but I know that all_major operating systems (Windows, Linux, Mac_OS) is_programmed in_C, moreover Java requires virtual machine. Does it would be much_harder to program than Java-based OS_than C-based OS? What_are the_advantages_and disadvantages of_each_of these_languages?

A:

http://wiki.osdev.org is an extremely useful site on_that matter._It tells you how to build_your toolchains, which language_options_that are available, and has some_great example code.
Yvan

A:

I would humbly suggest_that you truly learn a_programming_language_before trying to build an_operating system, after which you would_realize in which_languages you can or cannot write kernels_in_yourself. 
Programming languages such as Java_simply_does not offer the low-level routines_necessary_to_create an os. You can_implement your OS in c or_c++. Unless you master bootstrapping code (read assembler) and_a programming language_such as c, it would_be_a_good idea to reconsider a perhaps easier task. 
You could_however emulate_an OS by_running it as a program in another