打包之后，安卓机可以正常的拍摄（或从图片库选择），但选择（或拍照）之后页面不能预览图片。但是可以正常的上传和在页面中显示出（只是不能预览）。
另外，设置了拍照比例，但是无效果
import { Component } from ‘@angular/core’;
import { NavController, NavParams, ActionSheetController, LoadingController, ModalController, Platform, ToastController, ViewController, normalizeURL } from ‘ionic-angular’;
import { RestProvider } from ‘…/…/providers/rest/rest’;
import { Storage } from '@ionic/storage’
import { BaseUI } from ‘…/…/common/baseui’

import { File } from '@ionic-native/file’
import { FilePath } from '@ionic-native/file-path’
import { Transfer, TransferObject } from '@ionic-native/transfer’
import { Camera, CameraOptions } from ‘@ionic-native/camera’

/**

• Generated class for the UpdateheadfacePage page.
• See https://ionicframework.com/docs/components/#navigation for more info on
• Ionic pages and navigation.
  */

declare var cordova: any; //导入第三方的库定义到 TS 项目中

@Component({
selector: ‘page-updateavatar’,
templateUrl: ‘updateavatar.html’,
})
export class UpdateAvatarPage extends BaseUI {

userId: string;
errorMessage: string;
lastImg: string = ‘https://ss0.bdstatic.com/94oJfD_bAAcT8t7mm9GUKT-xh_/timg?image&quality=100&size=b4000_4000&sec=1536302517&di=0993208b1a76b5d2d565c2b644e1ff3a&src=http://a3.topitme.com/0/82/57/11302368668ab57820o.jpg’;

constructor(public navCtrl: NavController, public navParams: NavParams,
public actionSheetCtrl: ActionSheetController, public storage: Storage,
public rest: RestProvider, public loadingCtrl: LoadingController,
public modalCtrl: ModalController, public camera: Camera,
public file: File, public filePath: FilePath, public transfer: Transfer,
public platform: Platform, public toastCtrl: ToastController,
public viewCtrl: ViewController) {
super();
}
/**
*上弹选择框
*

• @memberof UpdateAvatarPage
  */
  presentActionSheet() {
  let actionSheet = this.actionSheetCtrl.create({
  title: ‘拍照或上传’,
  buttons: [
  {
  text: ‘拍照’,
  handler: () => {
  this.takePicture(this.camera.PictureSourceType.CAMERA);
  }
  },
  {
  text: ‘从图库中选择’,
  handler: () => {
  this.takePicture(this.camera.PictureSourceType.PHOTOLIBRARY);
  }
  },
  {
  text: ‘取消’,
  role: ‘cancel’,
  cssClass: ‘danger’,
  handler: () => {
  console.log(‘Cancel clicked’);
  }
  }
  ]
  });

actionSheet.present();

}

/**

• 获取图片（拍照或者图片库选择）
• @param {*} sourceType
• @memberof UpdateAvatarPage
  */
  takePicture(sourceType) {
  // 定义相机参数
  var options: CameraOptions = {
  quality: 100,
  sourceType: sourceType,
  saveToPhotoAlbum: true, //是否将拍摄的照片保存到相册
  correctOrientation: true, //是否纠正拍射照片的方向
  targetWidth: 100,
  targetHeight: 100,
  }

// 获取图片的方法
this.camera.getPicture(options).then((imagePath) => {
  // 特别处理安卓路径
  if (this.platform.is('android') && sourceType === this.camera.PictureSourceType.PHOTOLIBRARY) {
    this.filePath.resolveNativePath(imagePath).then(filePath => {
      let correctPath = filePath.substr(0, filePath.lastIndexOf('/') + 1);
      let currentName = imagePath.substring(imagePath.lastIndexOf('/') + 1, imagePath.lastIndexOf('?'));
      this.copyFileToLocalDir(correctPath, currentName, this.createFileName());
    });
  } else {
    let correctPath = imagePath.substr(0, imagePath.lastIndexOf('/') + 1);
    let currentName = imagePath.substr(imagePath.lastIndexOf('/') + 1);
    this.copyFileToLocalDir(correctPath, currentName, this.createFileName());
  }
}, (err) => {
  super.showToast(this.toastCtrl, '选择图片出现错误，请在 App 中操作或检查相关权限！')
})

}

// 将获取到的图片或拍摄的进行另存为，用于后期图片上传
copyFileToLocalDir(namePath, currentName, newFileName) {
this.file.copyFile(namePath, currentName, cordova.file.dataDirectory, newFileName).then(success => {
this.lastImg = newFileName;
}, error => {
super.showToast(this.toastCtrl, ‘存储图片到本地图库出现错误。’)
})
}

// 为文件创建新的文件名
createFileName() {
var d = new Date(),
n = d.getTime(),
newFileName = n + “.jpg”;
return newFileName
}

//将路径转换为可以上传的路径
public pathForImage(img) {
if (img === null) {
return ‘’;
} else {
return normalizeURL(cordova.file.dataDirectory + img);
}
}

/**
*上传图片
*

• @memberof UpdateAvatarPage
  */
  uploadImage() {
  var url = ‘https://imoocqa.gugujiankong.com/api/account/uploadheadface’; //后台定义的
  var targetPath = this.pathForImage(this.lastImg);
  var filename = this.userId + “.jpg”;
  // transfer 上传参数
  var options = {
  fileKey: “file”,
  fileName: filename,
  chunkedMode: false,
  mimeType: “multipart/form-data”,
  params: {
  ‘fileName’: filename,
  ‘userid’: this.userId
  }
  };

const fileTransfer: TransferObject = this.transfer.create();

var loading = super.showLoading(this.loadingCtrl, '上传中···');

// 正式上传
fileTransfer.upload(targetPath, url, options).then(data => {
  loading.dismiss();
  super.showToast(this.toastCtrl, "图片上传成功！");
  setTimeout(() => {
    this.viewCtrl.dismiss();
  }, 1500)
}, err => {
  loading.dismiss()
  super.showToast(this.toastCtrl, "图片上传发送错误，请重试！");
});

}

ionViewDidEnter() {
this.storage.get(“UserId”).then((val) => {
if (val != null) {
this.userId = val;
}
});
}
}