async_executor 0.0.2

Async Executor is a tool what allow you execute any asynchronous functions handling the loading process and error catch, with normal popups.

example/lib/main.dart

import 'dart:developer';

import 'package:async_executor/async_executor.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Async Executor Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
        // This makes the visual density adapt to the platform that you run
        // the app on. For desktop platforms, the controls will be smaller and
        // closer together (more dense) than on mobile platforms.
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  final AsyncExecutor normal = AsyncExecutor();
  final AsyncExecutor custom = AsyncExecutor(
    loadingMessage: (BuildContext context) async {
      await showDialog(
        context: context,
        barrierDismissible: false,
        builder: (context) {
          return WillPopScope(
            onWillPop: () async => false,
            child: Column(
              mainAxisSize: MainAxisSize.min,
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Material(
                  color: Colors.transparent,
                  child: Container(
                    height: 60,
                    child: Center(
                      child: CircularProgressIndicator(
                        backgroundColor: Colors.green,
                      ),
                    ),
                  ),
                )
              ],
            ),
          );
        },
      );
    },
    errorMessage: (
      BuildContext context,
      dynamic error,
    ) async {
      return await showDialog(
        context: context,
        builder: (dialogContext) {
          return AlertDialog(
            title: Text("Error"),
            content: Text(
              "$error",
              style: TextStyle(color: Colors.red),
            ),
            actions: [
              TextButton(
                child: Text("OK"),
                onPressed: () {
                  Navigator.pop(dialogContext);
                },
              )
            ],
          );
        },
      );
    },
  );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Async Executor Demo'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          ElevatedButton(
            onPressed: () {
              normal.run(
                  context: context,
                  onExecute: () async {
                    await Future.delayed(Duration(seconds: 3));
                  },
                  onFinish: (dynamic value) {
                    log("on finish");
                  });
            },
            child: Text("normal"),
          ),
          ElevatedButton(
            onPressed: () {
              normal.run(
                  context: context,
                  onExecute: () async {
                    await Future.delayed(Duration(seconds: 3));

                    throw Exception("Exception");
                  },
                  onFinish: (dynamic value) {
                    log("on finish");
                  });
            },
            child: Text("normal with error"),
          ),
          ElevatedButton(
            onPressed: () {
              custom.run(
                  context: context,
                  onExecute: () async {
                    await Future.delayed(Duration(seconds: 3));
                  },
                  onFinish: (dynamic value) {
                    log("on finish");
                  });
            },
            child: Text("custom"),
          ),
          ElevatedButton(
            onPressed: () {
              custom.run(
                  context: context,
                  onExecute: () async {
                    await Future.delayed(Duration(seconds: 3));
                    throw Exception("Exception");
                  },
                  onFinish: (dynamic value) {
                    log("on finish");
                  });
            },
            child: Text("custom with error"),
          ),
        ],
      ),
    );
  }
}