Flutter下载更新App的方法示例

if (Platform.isIOS) { final url = "https://itunes.apple.com/cn/app/id1380512641"; // id 后面的数字换成自己的应用 id 就行了 if (await canLaunch(url)) {  await launch(url, forceSafariVC: false); } else {  throw 'Could not launch $url'; }}

dependencies {  // 只复制这一行  implementation 'com.king.app:app-updater:1.0.4-androidx'}

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

package com.iwubida.flutter_yuedu.plugins;import android.content.Context;import android.util.Log;import com.king.app.updater.AppUpdater;import com.king.app.updater.callback.UpdateCallback;import java.io.File;import java.util.HashMap;import java.util.Map;import io.flutter.plugin.common.EventChannel;import io.flutter.plugin.common.PluginRegistry.Registrar;/** UpdateVersionPlugin */public class UpdateVersionPlugin implements EventChannel.StreamHandler { private static String TAG = "MY_UPDATE"; private static Context context; public UpdateVersionPlugin(Context context) {  this.context = context; } /** Plugin registration. */ public static void registerWith(Registrar registrar) {  final EventChannel channel = new EventChannel(registrar.messenger(), "plugins.iwubida.com/update_version");  channel.setStreamHandler(new UpdateVersionPlugin(registrar.context())); } @Override public void onListen(Object o, EventChannel.EventSink eventSink) {  if (o.toString().length() < 5) {   eventSink.error(TAG, "URL错误", o);   return;  }  if (!o.toString().startsWith("http")){   eventSink.error(TAG, "URL错误", o);  }  AppUpdater update = new AppUpdater(context,o.toString()).setUpdateCallback(new UpdateCallback() {   Map data = new HashMap<String, Object>();   // 发送数据到 Flutter   private void sendData() {    eventSink.success(data);   }   @Override   public void onDownloading(boolean isDownloading) {   }   @Override   public void onStart(String url) {    data.put("start", true);    data.put("cancel", true);    data.put("done", true);    data.put("error", false);    data.put("percent", 1);    sendData();   }   @Override   public void onProgress(int progress, int total, boolean isChange) {    int percent = (int)(progress * 1.0 / total * 100);    if (isChange && percent > 0) {     data.put("percent", percent);     sendData();    }   }   @Override   public void onFinish(File file) {    data.put("done", true);    sendData();   }   @Override   public void onError(Exception e) {    data.put("error", e.toString());    sendData();   }   @Override   public void onCancel() {    data.put("cancel", true);    sendData();   }  });  update.start(); } @Override public void onCancel(Object o) {  Log.i(TAG, "取消下载-集成的第三方下载没有提供取消方法"); }}

// 注册更新组件 在onCreate方法中UpdateVersionPlugin.registerWith(registrarFor("iwubida.com/update_version"));

static const channelName = 'plugins.iwubida.com/update_version'; static const stream = const EventChannel(channelName); // 进度订阅 StreamSubscription downloadSubscription; int percent = 0;   // 开始下载 void _startDownload() {  if (downloadSubscription == null) {   downloadSubscription = stream     .receiveBroadcastStream(widget.data.apkUrl)     .listen(_updateDownload);  } } // 停止监听进度 void _stopDownload() {  if (downloadSubscription != null) {   downloadSubscription.cancel();   downloadSubscription = null;   percent = 0;  } } // 进度下载 void _updateDownload(data) {  int progress = data["percent"];  if (progress != null) {   setState(() {    percent = progress;   });  } }