升级说明：
Android：应用内更新下载+安装。iOS：跳转到appstore下载安装。
注：可以通过热更新技术进行升级（我不会）。
引用插件：
#获取当前版本
package_info: ^0.4.3+2
#版本内更新
ota_update: ^2.4.1
#网页打开工具
url_launcher: ^5.7.10
#事件车
event_bus: ^1.1.1
直接上代码：
class VersionUpdate {
///检查是否需要更新
///是否需要升级--判断
static Future<bool> isUpdating() async {
PackageInfo packageInfo = await PackageInfo.fromPlatform();
String localVersion = packageInfo.version;
SpUtil.putString('localVersion', localVersion);
ApiResponse<VersionEntity> res =
await PersonalCenterAPI.updatingVersion(versionNo: packageInfo.version);
if (res.status == Status.COMPLETED) {
//如果获取服务器的版本号与当前应用程序的版本号对比，，不等那么提示升级(判断条件修改为符合自己的)
SpUtil.putObject('netVersionInfo', res.data.toJson());
if (res.data.currentVersion != localVersion) {
BottomSheetDialog.overLayDialog();
}
}
//return isUpdating;
}
///android--去android应用内下载更新 ---ios跳去App Store
static downloadNewVersion({String Url}) async {
if (Platform.isIOS) {
String url = Url;
if (await canLaunch(url)) {
await launch(url);
} else {
throw 'Could not launch $url';
}
} else if (Platform.isAndroid) {
String url = Url;
try {
// destinationFilename 是对下载的apk进行重命名
OtaUpdate().execute(url, destinationFilename: 'gzzoc.apk').listen(
(OtaEvent event) {
switch (event.status) {
case OtaStatus.DOWNLOADING: // 下载中
//TestEventBus().bus.fire(ProgressEvent(data: event.value));
ProgressEventBus().bus.fire(ProgressEvents(data: event.value));
print('status:${event.status},value:${event.value}');
break;
case OtaStatus.INSTALLING: //安装中
break;
case OtaStatus.PERMISSION_NOT_GRANTED_ERROR: // 权限错误
print('更新失败');
break;
default: // 其他问题
break;
}
},
);
} catch (e) {
print('更新失败');
}
}
}
}
overLayDialog
overLayDialog() {
OverlayState overlayState = Application.globalKey.currentState.overlay;
OverlayEntry overlayEntry;
overlayEntry = new OverlayEntry(builder: (context) {
return OverLayDialog(
overlayEntry: overlayEntry,
);
});
overlayState.insert(overlayEntry);
}
OverLayDialog名字太像了（忘记改了）
class OverLayDialog extends StatefulWidget {
final OverlayEntry overlayEntry;
OverLayDialog({this.overlayEntry});
@override
_OverLayDialogState createState() => _OverLayDialogState();
}
class _OverLayDialogState extends State<OverLayDialog> {
VersionEntity _netVersionInfo;
String _progress;
@override
void initState() {
// TODO: implement initState
super.initState();
_netVersionInfo =
VersionEntity.fromJson(SpUtil.getObject('netVersionInfo'));
ProgressEventBus().bus.on<ProgressEvents>().listen((event) {
if (!mounted) return;
setState(() {
_progress = event.data;
});
});
}
@override
Widget build(BuildContext context) {
return Material(
color: MyColors.black_cc00,
child: Container(
margin: EdgeInsets.symmetric(horizontal: 40),
child: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Stack(
alignment: Alignment.bottomCenter,
children: [
Stack(
children: [
Image.asset(
'assets/images/version_update.png',
),
Container(
margin: EdgeInsets.only(top: 60),
padding: EdgeInsets.symmetric(horizontal: 20),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'发现新版本',
style: TextStyle(
color: MyColors.white,
fontWeight: FontWeight.bold,
fontSize: 21),
),
Text('版本：${_netVersionInfo.currentVersion}',
style: TextStyle(
color: MyColors.white, fontSize: 16)),
Container(
height: MediaQuery.of(context).size.height / 3,
padding: EdgeInsets.only(top: 22, bottom: 22),
child: ListView.builder(
// itemCount: _content.length,
itemCount: _netVersionInfo?.description
?.split(';')
?.length,
itemBuilder: (context, index) {
return Padding(
padding:
EdgeInsets.symmetric(vertical: 7),
child: Text(
_netVersionInfo?.description
?.split(';')[index],
style: TextStyle(
color: MyColors.white,
fontSize: 15),
),
);
}),
)
],
),
),
],
),
Column(
children: [
_progress == null
? SizedBox.shrink()
: Text(
'$_progress%',
style: TextStyle(
color: MyColors.white, fontSize: 12),
),
InkWell(
onTap: () {
if (_progress == null) {
VersionUpdate.downloadNewVersion(
Url: _netVersionInfo?.url);
//'https://itunes.apple.com/cn/app/id414478124'
}
},
child: Container(
margin: EdgeInsets.only(
left: 20, right: 20, top: 5, bottom: 15),
decoration: BoxDecoration(
color: MyColors.white,
borderRadius:
BorderRadius.all(Radius.circular(50)),
),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
padding: EdgeInsets.symmetric(vertical: 10),
child: Text(
'立刻升级',
style: TextStyle(
color: MyColors.yellow_17,
fontSize: 17,
fontWeight: FontWeight.bold),
),
)
],
),
),
)
],
)
],
),
SizedBox(
height: 14,
),
_netVersionInfo?.forceFlag == '1'
? SizedBox.shrink()
: InkWell(
onTap: () {
widget?.overlayEntry?.remove();
},
child: Icon(
Icons.cancel_outlined,
color: MyColors.white,
size: 30,
),
)
],
),
)),
);
}
}
使用：我是在闪屏页的初始化中调用的，按照自己的需求改就行
//版本更新
VersionUpdate.isUpdating();
说明：SpUtil.putString是个工具，就是存储本地版本号而已，改SharedPreferences去存就行。
Application.globalKey.currentState.overlay：
class Application {
/// 全局key
static final GlobalKey<NavigatorState> globalKey =
GlobalKey<NavigatorState>();
注：适合刚入门看。缺少什么或者不懂的可以留言我补。刚接触flutter不久，各位指导指导。
