Cordova 插件不起作用

Question

我正在尝试使用Cordova插件：cordova-plugin-filepath

https://www.npmjs.com/package/cordova-plugin-filepath

在Corodva/ Ionic( Android) 应用程序上。

我正在尝试使用与上述网址相同的代码来使用它，我的意思是：

window.FilePath.resolveNativePath('content://...', successCallback, errorCallback);

但我得到：

  [11:36:22]  typescript: D:/ionic2/test-app/src/pages/home/home.ts, line: 27
        Property 'FilePath' does not exist on type 'Window'.

  L26:  this._camera.getPicture( options ).then(( imageData ) => {
  L27:      this.cameraUrl = window.FilePath.resolveNativePath(imageData);
  L28:      this.photoSelected = true;

我必须以window某种方式导入吗？

我正在使用这个插件来转换文件的路径：

content://com.android.providers.media.documents/document/...

到：

/storage/sdcard/...

这是我的环境信息：

Your system information:

Cordova CLI: 6.5.0
Ionic Framework Version: 3.0.1
Ionic CLI Version: 2.2.3
Ionic App Lib Version: 2.2.1
Ionic App Scripts Version: 1.3.0
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Windows 10
Node Version: v6.10.2
Xcode version: Not installed

以防万一，我在这里删除以下代码home.ts：

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { DomSanitizer } from '@angular/platform-browser';
import { Camera } from '@ionic-native/camera';

@Component( {
    selector: 'page-home',
    templateUrl: 'home.html'
})
export class HomePage {

    cameraData: string;
    photoTaken: boolean;
    cameraUrl: string;
    photoSelected: boolean;

    constructor( public navCtrl: NavController, private _DomSanitizationService: DomSanitizer, private _camera: Camera ) {
        this.photoTaken = false;
    }

    selectFromGallery() {
        var options = {
            sourceType: this._camera.PictureSourceType.PHOTOLIBRARY,
            destinationType: this._camera.DestinationType.NATIVE_URI
        };
        this._camera.getPicture( options ).then(( imageData ) => {
            this.cameraUrl = window.FilePath.resolveNativePath(imageData);
            this.photoSelected = true;
            this.photoTaken = false;
        }, ( err ) => {
            // Handle error
        });
    }

    openCamera() {
        var options = {
            sourceType: this._camera.PictureSourceType.CAMERA,
            destinationType: this._camera.DestinationType.DATA_URL,
            correctOrientation: true
        };
        this._camera.getPicture( options ).then(( imageData ) => {
            this.cameraData = 'data:image/jpeg;base64,' + imageData;
            this.photoTaken = true;
            this.photoSelected = false;
        }, ( err ) => {
            // Handle error
        });
    }

}

关于如何使这个插件工作的任何想法？

[编辑 1]

我通过以下方式修改了源代码：

import { FilePath } from '@ionic-native/file-path';
...
constructor(
        public navCtrl: NavController,
        private _DomSanitizationService: DomSanitizer,
        private _camera: Camera,
        private filePath: FilePath
) {
    this.photoTaken = false;
}
...
selectFromGallery() {
    var options = {
        sourceType: this._camera.PictureSourceType.PHOTOLIBRARY,
        destinationType: this._camera.DestinationType.NATIVE_URI
    };
    this._camera.getPicture( options ).then(( imagePath ) => {
        this.filePath.resolveNativePath(imagePath).then(filePath => {
            this.cameraUrl = filePath;
            this.photoSelected = true;
            this.photoTaken = false;
        });
    });
}

还做了：

$ ionic plugin add cordova-plugin-filepath

但现在我收到以下错误：

Runtime Error
Uncaught (in promise): Error: No provider for FilePath! Error at g (http://192.168.1.202:8100/build/polyfills.js:3:7133) at injectionError (http://192.168.1.202:8100/build/main.js:1511:86) at noProviderError (http://192.168.1.202:8100/build/main.js:1549:12) at ReflectiveInjector_._throwOrNull (http://192.168.1.202:8100/build/main.js:3051:19) at ReflectiveInjector_._getByKeyDefault (http://192.168.1.202:8100/build/main.js:3090:25) at ReflectiveInjector_._getByKey (http://192.168.1.202:8100/build/main.js:3022:25) at ReflectiveInjector_.get (http://192.168.1.202:8100/build/main.js:2891:21) at AppModuleInjector.NgModuleInjector.get (http://192.168.1.202:8100/build/main.js:3856:52) at resolveDep (http://192.168.1.202:8100/build/main.js:11260:45) at createClass (http://192.168.1.202:8100/build/main.js:11128:32) at createDirectiveInstance (http://192.168.1.202:8100/build/main.js:10954:37) at createViewNodes (http://192.168.1.202:8100/build/main.js:12303:49) at createRootView (http://192.168.1.202:8100/build/main.js:12208:5) at callWithDebugContext (http://192.168.1.202:8100/build/main.js:13339:42) at Object.debugCreateRootView [as createRootView] (http://192.168.1.202:8100/build/main.js:12800:12)
Stack
Error: Uncaught (in promise): Error: No provider for FilePath!
Error
    at g (http://192.168.1.202:8100/build/polyfills.js:3:7133)
    at injectionError (http://192.168.1.202:8100/build/main.js:1511:86)
    at noProviderError (http://192.168.1.202:8100/build/main.js:1549:12)
    at ReflectiveInjector_._throwOrNull (http://192.168.1.202:8100/build/main.js:3051:19)
    at ReflectiveInjector_._getByKeyDefault (http://192.168.1.202:8100/build/main.js:3090:25)
    at ReflectiveInjector_._getByKey (http://192.168.1.202:8100/build/main.js:3022:25)
    at ReflectiveInjector_.get (http://192.168.1.202:8100/build/main.js:2891:21)
    at AppModuleInjector.NgModuleInjector.get (http://192.168.1.202:8100/build/main.js:3856:52)
    at resolveDep (http://192.168.1.202:8100/build/main.js:11260:45)
    at createClass (http://192.168.1.202:8100/build/main.js:11128:32)
    at createDirectiveInstance (http://192.168.1.202:8100/build/main.js:10954:37)
    at createViewNodes (http://192.168.1.202:8100/build/main.js:12303:49)
    at createRootView (http://192.168.1.202:8100/build/main.js:12208:5)
    at callWithDebugContext (http://192.168.1.202:8100/build/main.js:13339:42)
    at Object.debugCreateRootView [as createRootView] (http://192.168.1.202:8100/build/main.js:12800:12)
    at g (http://192.168.1.202:8100/build/polyfills.js:3:7133)
    at l (http://192.168.1.202:8100/build/polyfills.js:3:6251)
    at http://192.168.1.202:8100/build/polyfills.js:3:6805
    at t.invokeTask (http://192.168.1.202:8100/build/polyfills.js:3:15213)
    at Object.onInvokeTask (http://192.168.1.202:8100/build/main.js:4415:37)
    at t.invokeTask (http://192.168.1.202:8100/build/polyfills.js:3:15134)
    at n.runTask (http://192.168.1.202:8100/build/polyfills.js:3:10390)
    at a (http://192.168.1.202:8100/build/polyfills.js:3:5313)

[编辑 2]

最重要的是，[EDIT 1]我做了以下版本：

@Component( {
    selector: 'page-home',
    templateUrl: 'home.html',
    providers: [ FilePath ]
})

这次我没有收到错误，但图像没有加载。我使用了一个文本区域来查看src传递给图像的值。

我还注意到现在我得到了真正的路径（这很好）。

也许现在是嵌入式webview. 请检查此链接：https : //forum.ionicframework.com/t/no-local-image-showing-in-view-on-device/30647

我想我越来越近了。

这是screenshot我的手机：

[编辑 3]

我running在一个Android带有这个命令的真实设备上：

$ ionic run android -l

Answer 1

首先你应该遵循Ionic2文档中的使用方法，而不是插件文档中的使用方法。

在此处查看 Ionic2 文档https://ionicframework.com/docs/native/file-path/

首先导入FilePath

import { FilePath } from '@ionic-native/file-path';

其次添加FilePath到你的构造函数中

constructor( 
  public navCtrl: NavController, 
  private _DomSanitizationService: DomSanitizer, 
  private _camera: Camera,
  private filePath: FilePath
) {
    this.photoTaken = false;
}

然后在您的代码中像这样使用它：

selectFromGallery() {
    var options = {
        sourceType: this._camera.PictureSourceType.PHOTOLIBRARY,
        destinationType: this._camera.DestinationType.NATIVE_URI
    };
    this._camera.getPicture( options ).then(( imageData ) => {
        //use this.filePath instead of window.FilePath
        this.cameraUrl = this.filePath.resolveNativePath(imageData); 
        this.photoSelected = true;
        this.photoTaken = false;
    }, ( err ) => {
        // Handle error
    });
}

编辑：由于海报使用的是 Ionic 3.0.1，因此需要添加提供程序，否则将导致no provider FilePath错误。

将提供程序添加到 @Component 中，如下所示：

@Component({
  ...
  providers: [ FilePath ],
 ...
})

希望这可以帮助！^_^