Ionic4.x、Cordova Android 检测应用版本号、服务器下载文件以及实现App自动升级、安装

this.fileOpener.open(entry.toURL(), 'application/vnd.android.package-archive')
      .then(() =>{
console.log('File is opened')
})
.catch(e =>{
console.log('Error openening file', e) });

import { Component } from '@angular/core';

import { FileOpener } from '@ionic-native/file-opener/ngx';
import { FileTransfer, FileTransferObject } from '@ionic-native/file-transfer/ngx';
import { AppVersion } from '@ionic-native/app-version/ngx';
import { File } from '@ionic-native/file/ngx';
import { AlertController } from '@ionic/angular';



@Component({
  selector: 'app-tab1',
  templateUrl: 'tab1.page.html',
  styleUrls: ['tab1.page.scss']
})
export classTab1Page {


  constructor(private file: File, private transfer: FileTransfer, private appVersion: AppVersion, private fileOpener: FileOpener, publicalertController: AlertController) {
  }

  //设备加载完成再去调用硬件
ngAfterContentInit(): void{
    //Called after ngOnInit when the component's or directive's content has been initialized.
    //Add 'implements AfterContentInit' to the class.
    this.isUpdate();
  }

  isUpdate() {
    //1、获取当前应用的版本号

    this.appVersion.getVersionNumber().then((value: any) =>{
      console.log(value)

      //2、请求服务器接口获取服务器的版本号

      this.showAlert();

    }).catch(err =>{
      console.log('getVersionNumber:' +err);
    });

  }

  async showAlert() {

    //3.弹窗提示用户是否更新    
    const alert = await this.alertController.create({
      header: '升级!',
      message: '发现新版本,是否立即升级？',
      buttons: [
        {
          text: '取消',
          role: 'cancel',
          cssClass: 'secondary',
          handler: (blah) =>{
          }
        }, {
          text: '确认',
          handler: () =>{
            //4.下载apk
            this.downloadApp();
          }
        }
      ]
    });
    await alert.present();

  }

  downloadApp() {
    //4.下载apk
    const targetUrl = 'http://127.0.0.1:8080/test.apk';
    const fileTransfer: FileTransferObject = this.transfer.create();

    console.log(this.file.dataDirectory);   //获取当前应用的安装（home）目录     1、应用包名称要一致   2、升级的包的版本号要大于当前应用的版本号   3、签名要一致    4、sdk 要安装
fileTransfer.download(targetUrl, this.file.dataDirectory + 'aaa.apk').then((entry) =>{
      //6、下载完成调用打开应用

       this.fileOpener.open(entry.toURL(),
        'application/vnd.android.package-archive')
        .then(() =>{
          console.log('File is opened')
        })
        .catch(e =>{
          console.log('Error openening file', e)
        });


    }, (error) =>{
      alert(JSON.stringify(error));
    });


    //5、获取下载进度    
    var oProgressNum = document.getElementById('progressnum');
    fileTransfer.onProgress((event) =>{
      let num = Math.ceil(event.loaded / event.total * 100);  //转化成1-100的进度
      if (num === 100) {
        oProgressNum.innerHTML = '下载完成';
      } else{
        oProgressNum.innerHTML = '下载进度：' + num + '%';

      }
    });

  }
}

ionic cordova plugin add integrator-cordova-plugin-downloader
npm install @ionic-native/downloader

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />