The issue arises when IonViewDidLoad fails to retrieve data from the service class in Ionic after the apk file has been generated

Creating a form where users can input various information, including their country code selected from dropdowns. Upon submission, the data is displayed successfully when running in a browser. However, after building the apk file, the country codes fail to load. The JSON file containing the countries' codes is stored in assets and accessed through providers. I am invoking the service in IonViewDidLoad as follows:

ionViewDidLoad(){
    this.service.getData()
    .subscribe(
      (success: Country) => {
        this.country = success;
        console.log(success);
      },
      err => {
        this.toast.create({
          message: JSON.parse(err)
        }).present()
      }
    )
  }

Below is my service class:

private url = "../../assets/imgs/country.json";
  constructor(public http: HttpClient) {
    console.log('Hello AppointmentProvider Provider');
  }

  public getData(){
    return this.http.get<any>(this.url);
  }

I have also attempted calling the service from IonViewDidEnter and the constructor without achieving success. Any assistance would be greatly appreciated, as I am relatively new to Ionic and Angular technologies.

Thank you for your help!

Answer №1

Without further information about the project, my recommendation would be to utilize angular lifecycle events and monitor any changes in behavior.

If you could please try running this code snippet:


ngAfterViewInit(){
    this.service.getData()
    .subscribe(
      (success: Country) => {
        this.country = success;
        console.log(success);
      },
      err => {
        this.toast.create({
          message: JSON.parse(err)
        }).present()
      }
    )
  }

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