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

Android App 升级执行流程

1、获取本地版本号
2、请求服务器获取服务器版本号

3、本地版本和服务器版本不一致提示升级，弹窗提示用户是否更新

4、用户确定升级，调用文件传输方法下载 apk 文件

5、监听下载进度
6、下载完成打开 Apk 进行安装

注意:在 ios 中没法直接下载安装，如果版本不一致直接跳转到 Ios 应用对应的应用市场就即可。

---

自动升级 APP 需要的插件

插件名称		插件地址
App Version	cordova-plugin-app-version	https://ionicframework.com/docs/native/app-version/
File Opener	cordova-plugin-file-opener2	https://ionicframework.com/docs/native/file-opener/
File Transfer	cordova-plugin-file-transfer	https://ionicframework.com/docs/native/file-transfer/
File	cordova-plugin-file	https://ionicframework.com/docs/native/file/

在 app.module.ts 引入注入

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

providers: [
    FileOpener,
    FileTransfer,
    AppVersion,
    File,
    ...
{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy } ]

在需要监听更新下载的页面引入、注入

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';

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

4、获取版本号

this.appVersion.getVersionNumber().then((value:any) => { console.log(value)
}).catch(err => { console.log('getVersionNumber:' + err);
});

5、获取当前的 apk 安装目录

this.file.dataDirectory

const targetUrl = 'http://127.0.0.1:8080/test.apk';
const fileTransfer: FileTransferObject = this.transfer.create(); fileTransfer.download(targetUrl, this.file.dataDirectory + 'test.apk').then((entry) => {
}, (error) => { alert(JSON.stringify(error));
});

6、下载文件，监听下载进度

onst fileTransfer: FileTransferObject = this.transfer.create();
fileTransfer.download(url, this.file.dataDirectory + test.apk'). then((entry) => {
alert('download complete: ' + entry.toURL()); }, (error) => { 
alert(JSON.stringify(error));});

进度:

var oProgressNum=document.getElementById('num'); fileTransfer.onProgress((event: ProgressEvent) => {
let num =Math.ceil(event.loaded/event.total * 100); if (num === 100) {
oProgressNum.innerHTML='下载完成'; } else {
oProgressNum.innerHTML='下载进度:' + num + '%'; }
});

7、打开安装文件

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

demo：

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 class Tab1Page {

  constructor(private file: File, private transfer: FileTransfer, private appVersion: AppVersion, private fileOpener: FileOpener, public alertController: 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 + '%';

      }
    });

  }
}

效果：

---

出现失败问题可能如下：

1.无法获取下载请求

　　1)先检查验证url是否正确

　　2).Android9.0以上改为https，使用域名下载

2.更换下载插件，使用downloader

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

3.无法打开跳转安装，请先检查权限问题：

在platforms\android\app\src\main中的AndroidManifest.xml添加

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

4.其他情况原因导致的，可能是手机版本或sdk环境，或插件版本或ionic版本和插件兼容性等等问题