📬 AppMessage

app_message is a lightweight, customizable Flutter library that allows you to display animated, dismissible banner messages at the top of your app. It’s ideal for showing alerts, toasts, and app-wide notifications with a clean and consistent design.

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✨ Features

• ✅ Animated top-banner messages
• ✅ Built-in types: information, success, caution, error, custom
• ✅ Fully customizable styles, widgets, colors, icons, and actions
• ✅ Global API: showAppMessage and clearAppMessage
• ✅ Swipe to dismiss
• ✅ Easy to integrate with MaterialApp

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🚀 Installation

Add this to your pubspec.yaml:

dependencies:
  app_message: <latest_version>

Then run:

flutter pub get

or

flutter pub add app_message

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🧱 Getting Started

1. Wrap Your App

To use AppMessage, wrap your entire app with it:

import 'package:app_message/app_message.dart';

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return AppMessage(
      child: MaterialApp(
        title: 'App Message Demo',
        home: const MyHomePage(),
      ),
    );
  }
}

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2. Show a Message

Use the showAppMessage function:

showAppMessage(
  context: context,
  title: "Hello!",
  message: "This is an informational message.",
  type: AppMessageType.information,
);

You can also clear a message manually:

clearAppMessage(context);

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🧪 Example Usage

OutlinedButton(
  onPressed: () {
    showAppMessage(
      context: context,
      title: "Success",
      message: "Operation completed successfully!",
      type: AppMessageType.success,
    );
  },
  child: Text("Show Success Message"),
);

Built-in types:

Type	Usage Example
information	For general info
success	Operation completed
caution	Warning or cautionary notes
error	For error messages
custom	Fully customizable with your own style

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🎨 Customization Options

The showAppMessage() function accepts several optional parameters:

showAppMessage(
  context: context,
  title: "Custom Title",
  message: "Custom message body",
  icon: Icon(Icons.star),
  textColor: Colors.black,
  backgroundColor: Colors.yellow.shade100,
  indicatorColor: Colors.amber,
  showDuration: 4,
  animationDuration: Duration(milliseconds: 300),
  padding: EdgeInsets.all(12),
  curve: Curves.easeInOut,
  onTap: (ctx) => print("Message tapped"),
);

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🧩 API Reference

showAppMessage({ ... })

Parameter	Type	Description
context	BuildContext (required)	Build context to find the AppMessage widget
title	String?	Optional message title
titleWidget	Widget?	Custom title widget
message	String?	Main message text
messageWidget	Widget?	Custom message widget
icon	Widget?	Optional icon
type	AppMessageType (default: information)	Predefined message type
onTap	Function(BuildContext)?	Callback when the message is tapped
textColor	Color?	Message text color
backgroundColor	Color?	Background color of the message box
indicatorColor	Color?	Color of the left indicator stripe
showDuration	int (seconds)	Duration the message stays on screen
animationDuration	Duration	Entry/exit animation duration
padding	EdgeInsetsGeometry?	Internal padding
curve	Curve	Animation curve

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📄 License

MIT License © NGUYEN HAI DANG

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💡 Tip

Call AppMessage.of(context)?.controller directly if you need fine-grained control, such as persistent messages, or want to implement your own advanced display logic.

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