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Flutter 微信分享功能实现
Flutter 用来快速开发 Android iOS平台应用,在Flutter 中,通过 fluwx或者fluwx_no_pay 插件来实现微信分享功能
主要还是看自己的需求,本示例我将按照没有支付的实现。至于为什么,主要是ios打包提审比较麻烦。
那么接下来就看一下如何实现吧,
1.首先去pub官网
https://pub.flutter-io.cn/
查找这两个包
代码语言:javascript复制fluwx_no_pay
或者
代码语言:javascript复制fluwx
image-20220106162910472
安装方式有两种:
flutter pub add fluwx_no_pay
2.
代码语言:javascript复制dependencies:
fluwx_no_pay: ^3.6.1 5
然后在使用的时候导入
代码语言:javascript复制import 'package:fluwx_no_pay/fluwx_no_pay.dart';
虽然它集成的功能很多
但是我们只做分享的演示
2 在微信开放平台注册开发者账号以及创建你的应用程序
微信开放平台链接
开发平台文档
创建应用填写基本的应用信息后,提交微信平台审核,审核通过后
从这里拿到 AppID ,然后再将配置的 iOS 平台的 Universal Links 拿过来,至于如何获取,请查看相关资料。
3 在分享页面
3.1 初始化
代码语言:javascript复制 @override
void initState() {
super.initState();
_initFluwx();
}
Future _initFluwx() async {
await WxSdk.init();
}
3.2 检测微信是否安装
如点击按钮时进行分享,分享前检查一下
代码语言:javascript复制 bool _wxIsInstalled = false;
void _checkWx() async {
_wxIsInstalled = await WxSdk.wxIsInstalled();
refreshUI();
}
3.3 分享微信消息
代码语言:javascript复制 String imagePath;
imagePath = await LocalImageCache.instance
.download(context, widget.cjinfo.cover, ext: ".jpg");
//压缩图片,我这儿用的flutter_image_compress
Uint8List image =
await FlutterImageCompress.compressWithFile(
imagePath,
minHeight: 128,
minWidth: 128,
quality: 20,
// rotate: 135,
);
WxSdk.ShareUrl(
//分享链接
"你的链接",
scene: 1,
thumbFile: imagePath,
desc: "描述",
title: "标题",
);
封装的工具类
代码语言:javascript复制import 'dart:io';
import 'dart:typed_data';
import 'check.dart';
import 'package:fluwx_no_pay/fluwx_no_pay.dart' as fluwx;
class WxSdk {
// static bool wxIsInstalled;
static Future init() async {
fluwx.registerWxApi(
appId: "你的appid",
doOnAndroid: true,
doOnIOS: true,
universalLink: "你的universalLink");
}
static Future<bool> wxIsInstalled() async {
return await fluwx.isWeChatInstalled;
}
/**
* 分享图片到微信,
* file=本地路径
* url=网络地址
* asset=内置在app的资源图片
* scene=分享场景,1好友会话,2朋友圈,3收藏
*/
static void ShareImage(
{String title,
String decs,
String file,
String url,
String asset,
int scene = 1}) async {
fluwx.WeChatScene wxScene = fluwx.WeChatScene.SESSION;
if (scene == 2) {
wxScene = fluwx.WeChatScene.TIMELINE;
} else if (scene == 3) {
wxScene = fluwx.WeChatScene.FAVORITE;
}
fluwx.WeChatShareImageModel model = null;
if (file != null) {
model = fluwx.WeChatShareImageModel(fluwx.WeChatImage.file(File(file)),
title: title, description: decs, scene: wxScene);
} else if (url != null) {
model = fluwx.WeChatShareImageModel(fluwx.WeChatImage.network(url),
title: title, description: decs, scene: wxScene);
} else if (asset != null) {
model = fluwx.WeChatShareImageModel(fluwx.WeChatImage.asset(asset),
title: title, description: decs, scene: wxScene);
} else {
throw Exception("缺少图片资源信息");
}
fluwx.shareToWeChat(model);
}
/**
* 分享文本
* content=分享内容
* scene=分享场景,1好友会话,2朋友圈,3收藏
*/
static void ShareText(String content, {String title, int scene = 1}) {
fluwx.WeChatScene wxScene = fluwx.WeChatScene.SESSION;
if (scene == 2) {
wxScene = fluwx.WeChatScene.TIMELINE;
} else if (scene == 3) {
wxScene = fluwx.WeChatScene.FAVORITE;
}
fluwx.WeChatShareTextModel model =
fluwx.WeChatShareTextModel(content, title: title, scene: wxScene);
fluwx.shareToWeChat(model);
}
/***
* 分享视频
* videoUrl=视频网上地址
* thumbFile=缩略图本地路径
* scene=分享场景,1好友会话,2朋友圈,3收藏
*/
static void ShareVideo(String videoUrl,
{String thumbFile, String title, String desc, int scene = 1}) {
fluwx.WeChatScene wxScene = fluwx.WeChatScene.SESSION;
if (scene == 2) {
wxScene = fluwx.WeChatScene.TIMELINE;
} else if (scene == 3) {
wxScene = fluwx.WeChatScene.FAVORITE;
}
fluwx.WeChatImage image = null;
if (thumbFile != null) {
image = fluwx.WeChatImage.file(File(thumbFile));
}
var model = fluwx.WeChatShareVideoModel(
videoUrl: videoUrl,
thumbnail: image,
title: title,
description: desc,
scene: wxScene);
fluwx.shareToWeChat(model);
}
/**
* 分享链接
* url=链接
* thumbFile=缩略图本地路径
* scene=分享场景,1好友会话,2朋友圈,3收藏
*/
static void ShareUrl(String url,
{String thumbFile,
Uint8List thumbBytes,
String title,
String desc,
int scene = 1,
String networkThumb,
String assetThumb}) {
desc = desc ?? "";
title = title ?? "";
if (desc.length > 54) {
desc = desc.substring(0, 54) "...";
}
if (title.length > 20) {
title = title.substring(0, 20) "...";
}
fluwx.WeChatScene wxScene = fluwx.WeChatScene.SESSION;
if (scene == 2) {
wxScene = fluwx.WeChatScene.TIMELINE;
} else if (scene == 3) {
wxScene = fluwx.WeChatScene.FAVORITE;
}
fluwx.WeChatImage image = null;
if (thumbFile != null) {
image = fluwx.WeChatImage.file(File(thumbFile));
} else if (thumbBytes != null) {
image = fluwx.WeChatImage.binary(thumbBytes);
} else if (strNoEmpty(networkThumb)) {
image = fluwx.WeChatImage.network(Uri.encodeFull(networkThumb));
} else if (strNoEmpty(assetThumb)) {
image = fluwx.WeChatImage.asset(assetThumb, suffix: ".png");
}
var model = fluwx.WeChatShareWebPageModel(
url,
thumbnail: image,
title: title,
description: desc,
scene: wxScene,
);
fluwx.shareToWeChat(model);
}
}
check.dart
代码语言:javascript复制/// 字符串不为空
bool strNoEmpty(String value) {
if (value == null) return false;
return value.trim().isNotEmpty;
}
/// 字符串不为空
bool mapNoEmpty(Map value) {
if (value == null) return false;
return value.isNotEmpty;
}
///判断List是否为空
bool listNoEmpty(List list) {
if (list == null) return false;
if (list.length == 0) return false;
return true;
}
//下载图片
代码语言:javascript复制import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:path_provider/path_provider.dart';
class LocalImageCache {
static LocalImageCache instance = LocalImageCache();
String _tmepPath = "";
void init() async {
var tempDir = await getTemporaryDirectory();
_tmepPath = tempDir.path;
}
/**
* 直接下载图片到本地临时目录
* ios必须带有后缀,不然exists会永远=false
*/
Future<String> download(BuildContext context, String url,{String ext = ""}) async {
try {
var dio = await Dio()
.get(url, options: Options(responseType: ResponseType.bytes));
Uint8List image = Uint8List.fromList(dio.data);
return save(image, url,ext: ext);
} catch (ex) {
print("image download error:${ex.toString()}");
return null;
}
}
}
总结
本文设计到的知识点有
- 如何进行微信分享
- 如何利用dio将图片下载到本地
- 如何利用flutter_image_compress压缩图片
主要问题
未安装微信
ios未配置白名单
图片太大了(所以我用了压缩技术)32k
开发平台文档
image-20220106172116585
以上就是一些在接入微信分享过程中遇到的一些问题。