本节目标

  • app 升级策略
  • android 动态授权
  • android 设备目录
  • ios 支持 swift 语言
  • 快速提示框

正文

ios 支持 swift 语言

  • 出发点

社区第三方包都在用 swift 开发,打包的时候需要加入 swift 语言包。

  • 操作

创建一个支持 swift 的新项目,然后把 lib assets pubspec.yaml 覆盖即可。

app 升级策略

代码实现

定义接口

  • post /app/update

加入依赖包

  • pubspec.yaml
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dependencies:
# 设备信息
device_info: ^0.4.2+3

# 包信息
package_info: ^0.4.0+18

# 路径查询
path_provider: ^1.6.8

# permission 权限
permission_handler: ^5.0.0+hotfix.6

# 安装
install_plugin: ^2.0.1

# 对话框
easy_dialog: ^1.0.5

升级工具类

  • lib/common/utils/update.dart
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import 'dart:io';

import 'package:dio/dio.dart';
import 'package:easy_dialog/easy_dialog.dart';
import 'package:flutter/material.dart';
import 'package:flutter_ducafecat_news/common/apis/app.dart';
import 'package:flutter_ducafecat_news/common/entitys/entitys.dart';
import 'package:flutter_ducafecat_news/common/widgets/toast.dart';
import 'package:flutter_ducafecat_news/global.dart';
import 'package:install_plugin/install_plugin.dart';
import 'package:path_provider/path_provider.dart';

/// app 升级
class AppUpdateUtil {
static AppUpdateUtil _instance = AppUpdateUtil._internal();
factory AppUpdateUtil() => _instance;

BuildContext _context;
AppUpdateResponseEntity _appUpdateInfo;

AppUpdateUtil._internal();

/// 获取更新信息
Future run(BuildContext context) async {
_context = context;

// 提交 设备类型、发行渠道、架构、机型
AppUpdateRequestEntity requestDeviceInfo = AppUpdateRequestEntity(
device: Global.isIOS == true ? "ios" : "android",
channel: Global.channel,
architecture: Global.isIOS == true
? Global.iosDeviceInfo.utsname.machine
: Global.androidDeviceInfo.device,
model: Global.isIOS == true
? Global.iosDeviceInfo.name
: Global.androidDeviceInfo.brand,
);
_appUpdateInfo =
await AppApi.update(context: context, params: requestDeviceInfo);

_runAppUpdate();
}

/// 检查是否有新版
Future _runAppUpdate() async {
// 比较版本
final isNewVersion =
(_appUpdateInfo.latestVersion.compareTo(Global.packageInfo.version) ==
1);

// 安装
if (isNewVersion == true) {
_appUpdateConformDialog(() {
Navigator.of(_context).pop();
if (Global.isIOS == true) {
// 去苹果店
InstallPlugin.gotoAppStore(_appUpdateInfo.shopUrl);
} else {
// apk 下载安装
toastInfo(msg: "开始下载升级包");
_downloadAPKAndSetup(_appUpdateInfo.fileUrl);
}
});
}
}

/// 下载文件 & 安装
Future _downloadAPKAndSetup(String fileUrl) async {
// 下载
Directory externalDir = await getExternalStorageDirectory();
String fullPath = externalDir.path + "/release.apk";

Dio dio = Dio(BaseOptions(
responseType: ResponseType.bytes,
followRedirects: false,
validateStatus: (status) {
return status < 500;
}));
Response response = await dio.get(
fileUrl,
);

File file = File(fullPath);
var raf = file.openSync(mode: FileMode.write);
raf.writeFromSync(response.data);
await raf.close();

// 安装
await InstallPlugin.installApk(fullPath, Global.packageInfo.packageName);
}

/// 升级确认对话框
void _appUpdateConformDialog(VoidCallback onPressed) {
EasyDialog(
title: Text(
"发现新版本 ${_appUpdateInfo.latestVersion}",
style: TextStyle(fontWeight: FontWeight.bold),
textScaleFactor: 1.2,
),
description: Text(
_appUpdateInfo.latestDescription,
textScaleFactor: 1.1,
textAlign: TextAlign.center,
),
height: 220,
contentList: [
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
new FlatButton(
padding: const EdgeInsets.only(top: 8.0),
textColor: Colors.lightBlue,
onPressed: onPressed,
child: new Text(
"同意",
textScaleFactor: 1.2,
),
),
new FlatButton(
padding: const EdgeInsets.only(top: 8.0),
textColor: Colors.lightBlue,
onPressed: () {
Navigator.of(_context).pop();
},
child: new Text(
"取消",
textScaleFactor: 1.2,
),
),
],
)
]).show(_context);
}
}

读取设备信息

  • 插件

https://pub.flutter-io.cn/packages/device_info

  • 全局信息

lib/global.dart

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/// 是否 ios
static bool isIOS = Platform.isIOS;

/// android 设备信息
static AndroidDeviceInfo androidDeviceInfo;

/// ios 设备信息
static IosDeviceInfo iosDeviceInfo;

/// 包信息
static PackageInfo packageInfo;

/// init
static Future init() async {
...

// 读取设备信息
DeviceInfoPlugin deviceInfoPlugin = DeviceInfoPlugin();
if (Global.isIOS) {
Global.iosDeviceInfo = await deviceInfoPlugin.iosInfo;
} else {
Global.androidDeviceInfo = await deviceInfoPlugin.androidInfo;
}

// 包信息
Global.packageInfo = await PackageInfo.fromPlatform();

...
  • 定义升级信息 entity

lib/common/entitys/app.dart

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class AppUpdateRequestEntity {
String device;
String channel;
String architecture;
String model;

AppUpdateRequestEntity({
this.device,
this.channel,
this.architecture,
this.model,
});

factory AppUpdateRequestEntity.fromJson(Map<String, dynamic> json) =>
AppUpdateRequestEntity(
device: json["device"],
channel: json["channel"],
architecture: json["architecture"],
model: json["model"],
);

Map<String, dynamic> toJson() => {
"device": device,
"channel": channel,
"architecture": architecture,
"model": model,
};
}

class AppUpdateResponseEntity {
String shopUrl;
String fileUrl;
String latestVersion;
String latestDescription;

AppUpdateResponseEntity({
this.shopUrl,
this.fileUrl,
this.latestVersion,
this.latestDescription,
});

factory AppUpdateResponseEntity.fromJson(Map<String, dynamic> json) =>
AppUpdateResponseEntity(
shopUrl: json["shopUrl"],
fileUrl: json["fileUrl"],
latestVersion: json["latestVersion"],
latestDescription: json["latestDescription"],
);

Map<String, dynamic> toJson() => {
"shopUrl": shopUrl,
"fileUrl": fileUrl,
"latestVersion": latestVersion,
"latestDescription": latestDescription,
};
}
  • api 请求

lib/common/apis/app.dart

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/// 系统相关
class AppApi {
/// 获取最新版本信息
static Future<AppUpdateResponseEntity> update({
@required BuildContext context,
AppUpdateRequestEntity params,
}) async {
var response = await HttpUtil().post(
'/app/update',
context: context,
params: params,
);
return AppUpdateResponseEntity.fromJson(response);
}
}
  • 提交信息 获取版本

lib/common/utils/update.dart

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/// 获取更新信息
Future run(BuildContext context) async {
_context = context;

// 提交 设备类型、发行渠道、架构、机型
AppUpdateRequestEntity requestDeviceInfo = AppUpdateRequestEntity(
device: Global.isIOS == true ? "ios" : "android",
channel: Global.channel,
architecture: Global.isIOS == true
? Global.iosDeviceInfo.utsname.machine
: Global.androidDeviceInfo.device,
model: Global.isIOS == true
? Global.iosDeviceInfo.name
: Global.androidDeviceInfo.brand,
);
_appUpdateInfo =
await AppApi.update(context: context, params: requestDeviceInfo);

_runAppUpdate();
}

/// 检查是否有新版
Future _runAppUpdate() async {
// 比较版本
final isNewVersion =
(_appUpdateInfo.latestVersion.compareTo(Global.packageInfo.version) ==
1);

// 安装
if (isNewVersion == true) {
_appUpdateConformDialog(() {
Navigator.of(_context).pop();
if (Global.isIOS == true) {
// 去苹果店
InstallPlugin.gotoAppStore(_appUpdateInfo.shopUrl);
} else {
// apk 下载安装
toastInfo(msg: "开始下载升级包");
_downloadAPKAndSetup(_appUpdateInfo.fileUrl);
}
});
}
}

android 动态授权

  • 插件

https://pub.flutter-io.cn/packages/permission_handler

  • 官方文章

https://developer.android.com/training/permissions/requesting

https://developer.android.com/training/permissions/usage-notes

  • AndroidManifest.xml 中加入权限

android/app/src/main/AndroidManifest.xml

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<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  • flutter 启动页中执行授权

lib/pages/index/index.dart

在 initState 是执行

延迟 3 秒,用户体验好些

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class _IndexPageState extends State<IndexPage> {
@override
void initState() {
super.initState();

if (Global.isRelease == true) {
doAppUpdate();
}
}

Future doAppUpdate() async {
await Future.delayed(Duration(seconds: 3), () async {
if (Global.isIOS == false &&
await Permission.storage.isGranted == false) {
await [Permission.storage].request();
}
if (await Permission.storage.isGranted) {
AppUpdateUtil().run(context);
}
});
}

android 目录权限

  • 插件

https://pub.flutter-io.cn/packages/path_provider
https://pub.flutter-io.cn/packages/install_plugin

  • 文章

https://developer.android.com/reference/androidx/core/content/FileProvider.html

  • lib/common/utils/update.dart
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/// 下载文件 & 安装
Future _downloadAPKAndSetup(String fileUrl) async {
// 下载
Directory externalDir = await getExternalStorageDirectory();
String fullPath = externalDir.path + "/release.apk";

Dio dio = Dio(BaseOptions(
responseType: ResponseType.bytes,
followRedirects: false,
validateStatus: (status) {
return status < 500;
}));
Response response = await dio.get(
fileUrl,
);

File file = File(fullPath);
var raf = file.openSync(mode: FileMode.write);
raf.writeFromSync(response.data);
await raf.close();

// 安装
await InstallPlugin.installApk(fullPath, Global.packageInfo.packageName);
}

EasyDialog 快速提示框

  • 插件

https://pub.flutter-io.cn/packages/easy_dialog

  • lib/common/utils/update.dart
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/// 升级确认对话框
void _appUpdateConformDialog(VoidCallback onPressed) {
EasyDialog(
title: Text(
"发现新版本 ${_appUpdateInfo.latestVersion}",
style: TextStyle(fontWeight: FontWeight.bold),
textScaleFactor: 1.2,
),
description: Text(
_appUpdateInfo.latestDescription,
textScaleFactor: 1.1,
textAlign: TextAlign.center,
),
height: 220,
contentList: [
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
new FlatButton(
padding: const EdgeInsets.only(top: 8.0),
textColor: Colors.lightBlue,
onPressed: onPressed,
child: new Text(
"同意",
textScaleFactor: 1.2,
),
),
new FlatButton(
padding: const EdgeInsets.only(top: 8.0),
textColor: Colors.lightBlue,
onPressed: () {
Navigator.of(_context).pop();
},
child: new Text(
"取消",
textScaleFactor: 1.2,
),
),
],
)
]).show(_context);
}

资源

视频

蓝湖设计稿(加微信给授权 ducafecat)

https://lanhuapp.com/url/wbhGq

YAPI 接口管理

http://yapi.demo.qunar.com/

代码

https://github.com/ducafecat/flutter_learn_news/releases/tag/v1.0.11

参考

  • 文章

https://developer.android.com/training/permissions/requesting
https://developer.android.com/training/permissions/usage-notes
https://developer.android.com/reference/androidx/core/content/FileProvider.html

  • flutter 插件

https://pub.flutter-io.cn/packages/device_info
https://pub.flutter-io.cn/packages/path_provider
https://pub.flutter-io.cn/packages/permission_handler
https://pub.flutter-io.cn/packages/install_plugin
https://pub.flutter-io.cn/packages/easy_dialog

VSCode 插件


© 猫哥

https://ducafecat.tech