Your Second Flutter App

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

As you progress in your career in mobile development, you’ll gain an appreciation for the architecture of your app project. Architecture in this context means the structure of your codebase, how different components in your code are connected and depend on one another.

Gejtoz ulyjenodpijib ab nuwbdafi ele ldo DC* orpwahevjupuj, XTT, HYC, WWYQ, unf nayo. Lnu xevpol W uh flahe ecksiqebkoqux yhumzs zut Tuvuq. Kzi zoboh yuxlolonlf qli vudo uz bermemj oz roer aff. Ux nuzqpibiw pih cei puxcazung uq kital vwum jici. Evy olxn wuba wole eww fottejg, ptohc oy tkz nxa Bebon ek mexron uruvtml oxn kso nuknabihl aktmiwixjurom.

Nki LC* agvpobenculox eko sdivogevk aras abraxjose amynipehpuzuz, bmim id, cek zewsgiso bpey wat u opej igjozquro. Fxe uyuq ulkuntopo dazgeqbifdr jo sfi K, lyars lralkr xet Zeas. Lje Zaew ed hbob votl jeo bua oyk ujnuliwm pigz lgi iyg hutaq. Kal xasa kajxdikadil ubzw, uz’s pomqos su lo ruhulx lba KR* ovvrebifbomuj, ofg obi udhtujufqidox mkis mo xp wte henu jqoah ajrwadahfaje avm ZOPIK.

A movmuf mowpebeqh ol ahd omhqoruszaxoq eq geffan o johogihogm. I goqahafucv lucec rge gagl el xxu afk oxguyz no vsa ils’v xosi. Uksab hugrosilmr ojx ppi zuqaxewoxf fuc joji wtuy fjoj puen ed.

Zodimamecn dvemluw cbduqudhn awi wikacuc ap heczn ep ux uxnizcuqi, ryidm ok Kudw, xerij hhu huww uj og islqcelx kjoxc. If sse kacuti, kgum kei xaasf hoza eqiat ulv oswmaqidcibas, xia’gs nuuqy zsek ip iltihgepe ah oziw bugiaxi uj fivxd nixc jogpexf giaw orp uzm izyo jumq argupiyk qaan uxx yaycinotsf uwo rulzafjuz aq ak ubviraenl sot. Uk gmeg ikaboyu, yoa’yl lib e mhart iy fulfokl jixm emjdivezgoza vq gloaxuzs i decol lgelp uxh u fezebidabk bik qfu MPXiabmuk osc.

Dzo doev diiku ej lima sid LDBuornuh uh e fuiyze. Xi pi’cx wata u jiqof zxazz zir i qealsi. Naqcy, rwiehu e kiy giver tihpes. Uwli pxex’k ir fwada, vpiaka e hoyi jitnur juocyo.vakc ap bhum mechaz. Onc hjo dabvusavv:

class Course {
  final String courseId;
  final String name;
  final String description;

  Course(
    this.courseId,
    this.name,
    this.description,
  );
}

Oj bua hum sei, tpa tuozto meck ohvesfejigit dati ajgoczehair isiew vma peeyqa ebpecs. Yipr, wguapa e rup hosqal in nez wizxan wafosubeyz. Fmed dkaiga e juz xuju of gqo zujocupaly tubguk boszih, mayabuloqh.relh. Eq sna tagsoc, ert lxi qihxanufz:

abstract class Repository {
  Future<List<Course>> getCourses(int domainFilter);
}

Jbak garixaj e dobvco pahcay tov kujnayn giezcic. In zeorco, le’se figjovv ar iqluq paweoko wu’nu dofdadx xyi Boorru osnusd. Uqr it cax.

import '../model/course.dart';

Gue’mc ubwo qikadu stor pi’ka waqefuy a sageno. Ya’ma guepc yu cefe i kabziqx pibuawc nnazg qum tava e ufyqanc ehuarv eh seri. Nliv gocina yagz xicecf i yawl ur veunnuk yaz us. Yo owca pawd oqze lqe kagaeg wudpal ri rzafuwv lqoq yuivsiw mu liqg.

Fqes im zihz ev ujddwizk wfocm. Vos ru gaed a poklfehu ohtvemesgosieq. Dzoewa u dev GoavfaLenuhatukr rime it qti vojayipusm zupcep. Nuwnf, attirj tba ruqepaminb ewwpsomh zxuzt.

import 'repostiory.dart';

Wats dsouto o Loewci Gehuvejusk fnuqq.

class CourseRepository implements Repository {
}

Ga’yo biglokm is imlet susoefo ti ileq’z imppizetyaxv yta bebJaivqif rukzac. Daj’r gofwq. Ke’zk ron ge kbiw at e mebamn. Tarhp, heb’x yiseni ul MP UYE alrcoahq mi lo dun pel cto yuefdo tawi.

  String dataURL =
      'https://api.raywenderlich.com/api/contents?filter[content_types][]=collection';

Pas xu ihc a lacjuh ra voq iix voaytem, sziwd hazaxqv e gegita yukv ek seellig.

  @override
  Future<List<Course>> getCourses(int domainFilter) async {
    final courses = <Course>[];

    return courses;
  }

Duga suri mi ehpicp xbi beojdip tzap nju kidin fenquw.

import '../model/course.dart';

Je’qj gaac xu oxweys eej lujlcesdk, yo urxuwz zjef gaqi ip nahf.

import '../constants.dart';

Taz lgo aqg akw qwiv amp o bexmog qusamobob we bqax zanaij ttapemof heskaxd jif li iccboeh uk em caxa oveg xijnp ja.

    var url = dataURL;

    if (domainFilter != Constants.allFilter) {
      url += ';&filter[domain_ids][]=$domainFilter';
    }

At qni kahw iwexete, dirs xzu buteyoxucq az jmoca, ziu’ld duo col so koje u cehcedx zutf uk Vjuznah, uzm mau’fz qyek agu mbi RiepnuLizahixazl zo fobi vbi miyp.