I'm getting this error.
Cannot read property 'checkPermission' of undefined
Also tried in ionic 3 but get same error
### My package.json file is here.
{ "name": "DemoV3", "version": "0.0.1", "author": "Ionic Framework", "homepage": "https://ionicframework.com/", "scripts": { "ng": "ng", "start": "ng serve", "build": "ng build", "test": "ng test", "lint": "ng lint", "e2e": "ng e2e" }, "private": true, "dependencies": { "@angular/common": "~8.1.2", "@angular/compiler": "~8.1.2", "@angular/core": "~8.1.2", "@angular/forms": "~8.1.2", "@angular/platform-browser": "~8.1.2", "@angular/platform-browser-dynamic": "~8.1.2", "@angular/router": "~8.1.2", "@ionic-native/core": "^5.0.0", "@ionic-native/splash-screen": "^5.0.0", "@ionic-native/status-bar": "^5.0.0", "@ionic/angular": "^4.7.1", "cordova-android": "8.1.0", "cordova-plugin-drawoverapps": "^1.0.6", "core-js": "^2.5.4", "rxjs": "~6.5.1", "tslib": "^1.9.0", "zone.js": "~0.9.1" }, "devDependencies": { "@angular-devkit/architect": "~0.801.2", "@angular-devkit/build-angular": "~0.801.2", "@angular-devkit/core": "~8.1.2", "@angular-devkit/schematics": "~8.1.2", "@angular/cli": "~8.1.2", "@angular/compiler": "~8.1.2", "@angular/compiler-cli": "~8.1.2", "@angular/language-service": "~8.1.2", "@ionic/angular-toolkit": "~2.0.0", "@types/jasmine": "~3.3.8", "@types/jasminewd2": "~2.0.3", "@types/node": "~8.9.4", "codelyzer": "^5.0.0", "cordova-plugin-device": "^2.0.2", "cordova-plugin-ionic-keyboard": "^2.2.0", "cordova-plugin-ionic-webview": "^4.1.2", "cordova-plugin-splashscreen": "^5.0.2", "cordova-plugin-statusbar": "^2.4.2", "cordova-plugin-whitelist": "^1.3.3", "jasmine-core": "~3.4.0", "jasmine-spec-reporter": "~4.2.1", "karma": "~4.1.0", "karma-chrome-launcher": "~2.2.0", "karma-coverage-istanbul-reporter": "~2.0.1", "karma-jasmine": "~2.0.1", "karma-jasmine-html-reporter": "^1.4.0", "protractor": "~5.4.0", "ts-node": "~7.0.0", "tslint": "~5.15.0", "typescript": "~3.4.3" }, "description": "An Ionic project", "cordova": { "plugins": { "cordova-plugin-whitelist": {}, "cordova-plugin-statusbar": {}, "cordova-plugin-device": {}, "cordova-plugin-splashscreen": {}, "cordova-plugin-ionic-webview": { "ANDROID_SUPPORT_ANNOTATIONS_VERSION": "27.+" }, "cordova-plugin-ionic-keyboard": {} }, "platforms": [ "android" ] } }