ionic v.3.20.0：未安装FilePath插件

Question

我在本论坛中发现了离子2的这个问题，但该解决方案不适用于离子v.3.20.0。

我遵循此处列出的步骤： https://ionicframework.com/docs/native/file-path/

根据给定的说明进行安装。然后我将插件添加到'app.module.ts'然后我将'Usage'部分的代码添加到我的ts文件中。

我正在Android设备（LG G4）上使用Google Play的Ionic Dev App预览应用程序，因此我可以使用'ionic serve -c'进行实时重新加载。

我在控制台中看到的错误是：

  

[18:56:16] console.warn：Native：尝试调用FilePath.resolveNativePath，但未安装FilePath插件。＆gt; [18:56:16] console.warn：安装FilePath插件：'ionic cordova   插件添加cordova-plugin-filepath'   [18:56:16] console.log：plugin_not_installed

有谁知道如何处理这个错误？

更新：package.json

{
  "name": "------------",
  "version": "0.0.1",
  "author": "-------------",
  "homepage": "----------------",
  "private": true,
  "scripts": {
    "clean": "ionic-app-scripts clean",
    "build": "ionic-app-scripts build",
    "lint": "ionic-app-scripts lint",
    "ionic:build": "ionic-app-scripts build",
    "ionic:serve": "ionic-app-scripts serve"
  },
  "dependencies": {
    "@angular/common": "5.0.3",
    "@angular/compiler": "5.0.3",
    "@angular/compiler-cli": "5.0.3",
    "@angular/core": "5.0.3",
    "@angular/forms": "5.0.3",
    "@angular/http": "5.0.3",
    "@angular/platform-browser": "5.0.3",
    "@angular/platform-browser-dynamic": "5.0.3",
    "@ionic-native/background-mode": "^4.5.3",
    "@ionic-native/camera": "4.3.3",
    "@ionic-native/core": "4.4.0",
    "@ionic-native/file-path": "^4.5.3",
    "@ionic-native/media": "^4.5.3",
    "@ionic-native/music-controls": "^4.5.3",
    "@ionic-native/native-audio": "^4.5.3",
    "@ionic-native/splash-screen": "4.4.0",
    "@ionic-native/status-bar": "4.4.0",
    "@ionic-native/streaming-media": "^4.5.3",
    "@ionic/storage": "2.1.3",
    "@ngx-translate/core": "8.0.0",
    "@ngx-translate/http-loader": "^2.0.0",
    "com.hutchind.cordova.plugins.streamingmedia": "~0.1.4",
    "cordova-browser": "~5.0.3",
    "cordova-plugin-background-mode": "git+https://github.com/katzer/cordova-plugin-background-mode.git",
    "cordova-plugin-device": "^2.0.1",
    "cordova-plugin-file": "^6.0.1",
    "cordova-plugin-filepath": "^1.2.0",
    "cordova-plugin-ionic-keyboard": "^2.0.5",
    "cordova-plugin-ionic-webview": "^1.1.16",
    "cordova-plugin-media": "^5.0.2",
    "cordova-plugin-music-controls": "^2.1.4",
    "cordova-plugin-nativeaudio": "^3.0.9",
    "cordova-plugin-splashscreen": "^5.0.2",
    "cordova-plugin-streaming-media": "^1.0.2",
    "cordova-plugin-whitelist": "^1.3.3",
    "ionic-angular": "3.9.2",
    "ionicons": "3.0.0",
    "rxjs": "5.5.2",
    "sw-toolbox": "3.6.0",
    "zone.js": "0.8.18"
  },
  "devDependencies": {
    "@ionic/app-scripts": "3.1.8",
    "typescript": "2.4.2"
  },
  "description": "----------------------------",
  "cordova": {
    "plugins": {
      "cordova-plugin-whitelist": {},
      "cordova-plugin-device": {},
      "cordova-plugin-splashscreen": {},
      "cordova-plugin-ionic-webview": {},
      "cordova-plugin-ionic-keyboard": {},
      "com.hutchind.cordova.plugins.streamingmedia": {},
      "cordova-plugin-nativeaudio": {},
      "cordova-plugin-background-mode": {},
      "cordova-plugin-media": {},
      "cordova-plugin-music-controls": {},
      "cordova-plugin-filepath": {}
    },
    "platforms": [
      "browser"
    ]
  }
}