Flutter AppBar - All Common Properties

Scaffold(
  appBar: AppBar(

    // AppBar এর Title
    title: Text("Home Page"),

    // Title Center এ থাকবে কিনা
    centerTitle: true,

    // Title এর Style
    titleTextStyle: TextStyle(
      fontSize: 22,
      fontWeight: FontWeight.bold,
      color: Colors.white,
    ),

    // Leading Widget (সাধারণত Back Button)
    leading: Icon(Icons.menu),

    // Leading Widget এর Width
    leadingWidth: 60,

    // Automatically Back Button দেখাবে কিনা
    automaticallyImplyLeading: true,

    // Title এর আগে Widget
    flexibleSpace: Container(
      decoration: BoxDecoration(
        gradient: LinearGradient(
          colors: [
            Colors.blue,
            Colors.purple,
          ],
        ),
      ),
    ),

    // Right Side Widgets
    actions: [

      IconButton(
        onPressed: () {},
        icon: Icon(Icons.search),
      ),

      IconButton(
        onPressed: () {},
        icon: Icon(Icons.notifications),
      ),
    ],

    // Background Color
    backgroundColor: Colors.blue,

    // Foreground Color (Text + Icon)
    foregroundColor: Colors.white,

    // Shadow Color
    shadowColor: Colors.black,

    // Elevation
    elevation: 8,

    // Scroll করলে Elevation
    scrolledUnderElevation: 12,

    // Bottom Widget
    bottom: PreferredSize(
      preferredSize: Size.fromHeight(50),
      child: Text(
        "Bottom Widget",
      ),
    ),

    // Toolbar Height
    toolbarHeight: 70,

    // Toolbar Opacity
    toolbarOpacity: 1.0,

    // Bottom Opacity
    bottomOpacity: 1.0,

    // AppBar Shape
    shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.vertical(
        bottom: Radius.circular(20),
      ),
    ),

    // AppBar এর নিচে Shadow দেখাবে কিনা
    forceMaterialTransparency: false,

    // Primary AppBar কিনা
    primary: true,

    // Title ও Actions এর মাঝে Space
    actionsPadding: EdgeInsets.only(
      right: 10,
    ),

    // Icon Theme
    iconTheme: IconThemeData(
      color: Colors.white,
      size: 28,
    ),

    // Action Icon Theme
    actionsIconTheme: IconThemeData(
      color: Colors.yellow,
      size: 26,
    ),

    // System Status Bar Style
    systemOverlayStyle: SystemUiOverlayStyle.light,

    // AppBar এর Clip Behavior
    clipBehavior: Clip.none,
  ),

  body: Center(
    child: Text("Flutter AppBar"),
  ),
);

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📌 AppBar Properties Summary

Property	কাজ
title	AppBar এর Title
centerTitle	Title Center করবে
leading	Left Side Widget
actions	Right Side Widgets
backgroundColor	Background Color
foregroundColor	Text/Icon Color
elevation	Shadow Height
shadowColor	Shadow Color
toolbarHeight	AppBar Height
flexibleSpace	Custom Background
bottom	TabBar বা Bottom Widget
shape	Custom Shape
iconTheme	Leading Icon Style
actionsIconTheme	Action Icon Style
titleTextStyle	Title Text Style
systemOverlayStyle	Status Bar Style
scrolledUnderElevation	Scroll হলে Elevation
automaticallyImplyLeading	Auto Back Button
leadingWidth	Leading Widget Width
actionsPadding	Actions এর Padding
primary	Primary AppBar কিনা
clipBehavior	Overflow Clip Control