Android

关注公众号 jb51net

关闭
首页 > 软件编程 > Android > Flutter webview与网页通讯

Flutter webview与网页通讯交互实现

作者：我也还在想

最近要在Flutter项目的基础上加一个实时定位的功能,下面这篇文章主要给大家介绍了关于Flutter webview与网页通讯交互实现的相关资料,文中通过示例代码介绍的非常详细,需要的朋友可以参考下

前言

在app开发中我们有JSBridge来实现app和网页端通讯，现参考JSBridge实现了Flutter webview和网页端通讯。

预览

flutter

import 'package:ds_bridge/ds_bridge.dart';
class JsBridgeUtil {
  // 向H5调用接口
  static executeMethod(flutterWebViewPlugin, String jsonStr) async{
    DsBridge dsBridge = DsBridge(flutterWebViewPlugin);
    Result result = dsBridge.dispatch(jsonStr);
    if(result.method == 'share'){
      result.callBack('收到网页端share事件，内容为${result.data}并返回此文本给网页');
    }
    if(result.method == 'share1'){
      result.callBack('收到网页端share1事件');
    }
  }
}

网页

import 'dsbridge_flutter'
dsBridge.call('share', { name: 'woyehaizaixiang' }, function (res) {
  alert(res)
})

具体实现

flutter中使用ds_bridge

此包是flutter_webview_pluginwebview与网页交互的工具包，需要先添加flutter_webview_plugin组件，具体flutter_webview_plugin组件使用请前往官网查看 ，在添加flutter_webview_plugin组件后，添加ds_bridge组件

1.配置依赖包

dependencies:
    ds_bridge: ^0.0.1

2.在webview页面添加JavascriptChannel

webview.dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:yundk_app/routes/application.dart';
import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';
import '../../utils/JsBridgeUtil.dart';

class WebviewPage extends StatefulWidget {
  final String url;
  final VoidCallback backCallback;

  WebviewPage({
    Key key,
    @required this.url,
    this.backCallback,
  }) : super(key: key);

  @override
  _WebviewPageState createState() => _WebviewPageState();
}

class _WebviewPageState extends State<WebviewPage> {
  String _title = '';
  final flutterWebViewPlugin = FlutterWebviewPlugin();
  final Set<JavascriptChannel> jsChannels = [
    JavascriptChannel(
        name: 'DsBridgeApp',
        onMessageReceived: (JavascriptMessage msg) {
          String jsonStr = msg.message;
          JsBridgeUtil.executeMethod(FlutterWebviewPlugin(), jsonStr);
        }),
  ].toSet();

  StreamSubscription<String> _onUrlChanged;

  @override
  void initState() {
    super.initState();
    flutterWebViewPlugin.close();

    // 监听 url changed
    _onUrlChanged =
    flutterWebViewPlugin.onUrlChanged.listen((String url) async {

    });

    // 监听页面onload
    flutterWebViewPlugin.onStateChanged.listen((viewState) async {
      if (viewState.type == WebViewState.finishLoad) {
        flutterWebViewPlugin.evalJavascript('document.title').then((result) => {
          setState(() {
            _title = result;
          })
        });
      }
    });

  }

  @override
  void dispose() {
    _onUrlChanged.cancel();
    flutterWebViewPlugin.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: WebviewScaffold(
        appBar: new AppBar(
          leading: IconButton(
            hoverColor: Colors.transparent,
            highlightColor: Colors.transparent,
            icon: Icon(const IconData(0xe61b, fontFamily: 'IconFont'), color: Color(0xff333333), size: 18),
            onPressed: (){
              flutterWebViewPlugin.close();
              Application.router.pop(context);
            },
          ),
          title: new Text(
            _title,
            style: TextStyle(color: Color(0xff333333), fontSize: 17),
          ),
          actions: [
            new IconButton(
              icon: new Icon(
                Icons.refresh_outlined,
                color: Color(0xff333333),
                size: 20
              ),
              onPressed: () {
                flutterWebViewPlugin.reload();
              }
            ),
          ],
          centerTitle: true,
          elevation: 0,
        ),
        url: widget.url,
        javascriptChannels: jsChannels,
        mediaPlaybackRequiresUserGesture: false,
        withZoom: true,
        withLocalStorage: true,
        hidden: true,
      )
    );
  }
}

3.在JsBridgeUtil类中

utils/JsBridgeUtil.dart

import 'package:ds_bridge/ds_bridge.dart';
class JsBridgeUtil {
  // 向H5调用接口
  static executeMethod(flutterWebViewPlugin, String jsonStr) async{
    DsBridge dsBridge = DsBridge(flutterWebViewPlugin);
    Result result = dsBridge.dispatch(jsonStr);
    if(result.method == 'share'){
      result.callBack('收到网页端share事件，内容为${result.data}并返回此文本给网页');
    }
    if(result.method == 'share1'){
      result.callBack('收到网页端share1事件');
    }
  }
}

网页端使用dsbridge_flutter

此插件为网页端插件，配合flutter端ds_bridge一起使用

1.安装

npm install dsbridge_flutter

2.使用

import 'dsbridge_flutter'
dsBridge.call(<String> method, <Object> data, <Function> callback)

3.例子

import 'dsbridge_flutter'
dsBridge.call('share', { name: 'woyehaizaixiang' }, function (res) {
  alert(res)
})

总结

本文参考JSBridge实现了Flutter webview和网页端交互。具体用到的插件有Flutter端flutter_webview_plugin和ds_bridge、网页端有dsbridge_flutter。

到此这篇关于Flutter webview与网页通讯交互实现的文章就介绍到这了,更多相关Flutter webview与网页通讯内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

您可能感兴趣的文章:
阅读全文