Error: Unknown argument: platform ionic cordova

Question

I installed Ionic with Angular and the Android platform, immediately afterwards I started the "Ionic Cordova Build Android" command but gives me this error: Error: Unknown Argument: Platform [Error] An Error Occurred While Running Subprocess NG.

Answer 1

If you run this command: ng add @ionic/cordova-builders

Answer 2

You may need to install the packages as explained on https://ionicframework.com/blog/updates-to-ionic-angular-toolkit/

Add update the angular.json file as below. (ionic-cordova-build and ionic-cordova-serve sections)

     "e2e": {
      "builder": "@angular-devkit/build-angular:protractor",
      "options": {
        "protractorConfig": "e2e/protractor.conf.js",
        "devServerTarget": "app:serve"
      },
      "configurations": {
        "production": {
          "devServerTarget": "app:serve:production"
        },
        "ci": {
          "devServerTarget": "app:serve:ci"
        }
      }
    },
    "ionic-cordova-build": {
      "builder": "@ionic/cordova-builders:cordova-build",
      "options": {
        "browserTarget": "app:build"
      },
      "configurations": {
        "production": {
          "browserTarget": "app:build:production"
        }
      }
    },
    "ionic-cordova-serve": {
      "builder": "@ionic/cordova-builders:cordova-serve",
      "options": {
        "cordovaBuildTarget": "app:ionic-cordova-build",
        "devServerTarget": "app:serve"
      },
      "configurations": {
        "production": {
          "cordovaBuildTarget": "app:ionic-cordova-build:production",
          "devServerTarget": "app:serve:production"
        }
      }
    }
  }
}

},