大佬教程收集整理的这篇文章主要介绍了离子 4：插件 firebase 和 google-maps 的问题 - 默认 FirebaseApp 在此过程 com.superagent.agent 中未初始化。一定要打电话，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
我正在使用 Ionic 4 开发 AndroID 应用程序，现在我在使用 @ionic-native/Google-maps 和 @ionic-native/firebase-messaging 时遇到了问题。我无法接收推送通知和触发 Firebase 分析。但我的谷歌地图正常工作。另外，我正在为这些应用程序使用 Jscrambler
我总是在调用 fcm.getToken() 方法时出现此错误，即 fcm 是 firebase-messaging 插件的别名。这是错误：
ERROR Error: Uncaught (in promisE): Default FirebaseApp is not initialized in this process com.xxx.xxx. Make sure to call FirebaseApp.initializeApp(Context) first.
at resolvePromise (/polyfills-es2015.Js:4153)
at /polyfills-es2015.Js:4063
at Object.callBACkFromNative (cordova.Js:297)
at processmessage (cordova.Js:1134)
at processmessages (cordova.Js:1157)
at ZoneDelegate.invoke (/polyfills-es2015.Js:3715)
at Object.onInvoke (/vendor-es2015.Js:82899)
at ZoneDelegate.invoke (/polyfills-es2015.Js:3714)
at Zone.run (/polyfills-es2015.Js:3480)
at /polyfills-es2015.Js:4211
在 app.component.ts 上调用 firebase getToken 的函数在这里：
async initializeApp() {
await this.platform.ready().then(() => {
this.params.getUserData().then(userdata => {
thiS.UserData = userdata;
// set fcm token when there is saved session on storage for all environment
this.fcm.getToken().then(this.setdevicEID);
this.fcm.onTokenrefresh().subscribe(this.setdevicEID);
if(environment.production) {
// init fbase analytics only on production & there is saved session on storage
this.initFbAnalytics();
}else{
// subscribe to topic guest_dev when in deveLeopment mode
this.fcm.subscribe("guest_dev");
}
});
});
};
还有我的 package.Json 文件依赖项：
"dependencIEs": {
"@angular/animations": "^8.2.0","@angular/common": "^8.2.0","@angular/core": "^8.2.0","@angular/forms": "^8.2.0","@angular/platform-browser": "^8.2.0","@angular/platform-browser-dynamic": "^8.2.0","@angular/router": "^8.2.0","@ionic-native/app-rate": "^5.33.1","@ionic-native/camera": "^5.11.0","@ionic-native/clipboard": "^5.27.0","@ionic-native/core": "^5.11.0","@ionic-native/facebook": "^5.28.0","@ionic-native/file": "^5.27.0","@ionic-native/file-opener": "^5.27.0","@ionic-native/firebase-analytics": "^5.11.0","@ionic-native/firebase-messaging": "^5.11.0","@ionic-native/Google-maps": "^5.5.0","@ionic-native/in-app-browser": "^5.12.0","@ionic-native/keyboard": "^5.29.0","@ionic-native/market": "^5.26.0","@ionic-native/mobile-accessibility": "^5.30.0","@ionic-native/social-sharing": "^5.11.0","@ionic-native/splash-screen": "^5.11.0","@ionic-native/sqlite": "^5.29.0","@ionic-native/status-bar": "^5.11.0","@ionic/angular": "^4.7.1","@types/hAMMerJs": "^2.0.36","compare-func": "^2.0.0","cordova-androID": "9.0.0","cordova-browser": "6.0.0","cordova-clipboard": "^1.3.0","cordova-plugin-androIDx": "^1.0.2","cordova-plugin-androIDx-adapter": "^1.1.0","cordova-plugin-appsflyer-sdk": "^4.4.22","cordova-plugin-camera": "4.1.0","cordova-plugin-device": "2.0.2","cordova-plugin-facebook4": "^6.4.0","cordova-plugin-file": "^6.0.2","cordova-plugin-file-opener2": "^3.0.4","cordova-plugin-firebase-analytics": "^3.0.0","cordova-plugin-firebase-messaging": "^3.0.0","cordova-plugin-inappbrowser": "^3.1.0","cordova-plugin-ionic-keyboard": "^2.0.5","cordova-plugin-ionic-webview": "^3.0.0","cordova-plugin-market": "^1.2.0","cordova-plugin-splashscreen": "5.0.2","cordova-plugin-statusbar": "2.4.2","cordova-plugin-whiteList": "1.3.3","cordova-plugin-x-socialsharing": "^5.4.7","cordova-sqlite-storage": "^5.1.0","cordova-support-androID-plugin": "^1.0.1","cordova-support-Google-services": "^1.3.1","core-Js": "^2.6.9","crypto-Js": "^4.0.0","dom-to-image-more": "^2.8.0","es6-promise-plugin": "^4.2.2","hAMMerJs": "^2.0.8","ion-bottom-drawer": "^2.0.0","ion2-calendar": "^3.0.0-rc.0","ionic-long-press": "2.0.3","Jscrambler": "^5.5.25","Jspdf": "^1.5.3","moment": "^2.27.0","rxJs": "~6.5.2","text-mask-core": "^5.1.2","tslib": "^1.10.0","zone.Js": "~0.9.1"
}
哦，这是我的离子信息
Ionic:
Ionic Cli : 6.14.0 (/usr/local/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 4.11.13
@angular-devkit/build-angular : 0.803.29
@angular-devkit/scheR_242_11845@atics : 8.3.29
@angular/cli : 8.2.2
@ionic/angular-toolkit : 2.3.3
Cordova:
Cordova Cli : 10.0.0
Cordova Platforms : not available
Cordova Plugins : not available
Utility:
cordova-res : not installed
native-run (update available: 1.4.0) : 1.3.0
System:
AndroID SDK Tools : 26.1.1 (/home/nt/AndroID/Sdk)
NodeJs : v10.19.0 (/usr/bin/nodE)
npm : 6.14.4
OS : linux 5.8
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