trackoffical_app/lib/view/app_update_view.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:trackoffical_app/logger.dart';
import 'package:trackoffical_app/pb.dart' as pb;
import 'package:trackoffical_app/service/app.dart';
import 'package:trackoffical_app/widget/will_exit_after_2_back.dart';
import '../styles/theme.dart';

class AppUpdateController extends GetxController {
  final downloadProcess = 0.0.obs;
  Timer? _ticker;

  @override
  void onReady() {
    var arg = Get.arguments;
    if (arg is pb.GetUpdateVersionReply){
      App.to.updateApp(arg).then((value){
        info('下载完成');
      }, onError: (e){
        warn('安装失败：', e);
      });
    }
    _ticker = Timer.periodic(100.milliseconds, (timer) {
       App.to.getUpdateAppProcess().then((value) => downloadProcess.value = value);
    });
  }

  @override
  void onClose(){
    _ticker?.cancel();
  }
}

class AppUpdateView extends GetView<AppUpdateController> {
  final pb.GetUpdateVersionReply data;

  const AppUpdateView(this.data, {super.key});

  static Bindings bindings() {
    return BindingsBuilder(() {
      Get.put<AppUpdateController>(AppUpdateController());
    });
  }

  static void show(pb.GetUpdateVersionReply updateInfo) {
    Get.offAll(
        AppUpdateView(updateInfo),
        binding: AppUpdateView.bindings(),
        arguments: updateInfo
    );
  }

  @override
  Widget build(BuildContext context) {
    return WillExitAfter2Back(child: Scaffold(
      body: Container(
        width: double.infinity,
        height: double.infinity,
        padding: const EdgeInsets.all(24),
        child: Center(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              const SizedBox(height: 100),
              Image.asset('assets/images/sign_in_logo.png', height: 45.77),
              const SizedBox(height: 45.35),
              Image.asset('assets/images/ic_logo_rect.png', height: 54),
              const SizedBox(height: 21),
              Text('小飞龙定向软件升级', 
                      style: context.textTheme.titleLarge?.copyWith(fontSize: 13, color: const Color(0xffaaaaaa))),

              const SizedBox(height: 24),
              Flexible(
                flex: 1,
                child: Container(
                      padding: const EdgeInsets.all(24),
                      height: 400,
                      width: double.infinity,
                      child: SizedBox(
                        width: double.infinity,
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            const Text('更新内容：'),
                            Text(data.vMemo)
                          ],
                        ) ,
                      ) ,
                    ),
                  ),
              const SizedBox(height: 24),
              SizedBox(
                height: 17.42,
                child: ClipRRect(
                    borderRadius: const BorderRadius.all(Radius.circular(8.71)),
                  child: Obx(() => LinearProgressIndicator(
                      value: controller.downloadProcess.value),
                )  )
              ),
              const SizedBox(height: 100)
            ],
          ),
        ),
      ),
    )) ;
  }
}

void main() async {
  var c = AppUpdateController();
  c.downloadProcess.value = 0.5;
  Get.put(c);

  runApp(GetMaterialApp(
      theme: appThemeData(),
      home: AppUpdateView(pb.GetUpdateVersionReply()..vMemo= "更新内容")));
}