Flutter UI Components Quiz
16 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

How can you customize the Floating Action Button's shape in Flutter?

  • By using the `shape` property with the `BeveledRectangleBorder` widget to create a circular or square shape. (correct)
  • By adjusting the `borderRadius` property of the `FloatingActionButton` widget.
  • By implementing `CircleBorder` or `StadiumBorder` for a circular or a rounded shape.
  • By defining a custom `ShapeBorder` widget using the `CustomPainter` class. (correct)

    • Which of these are suitable containers for a draggable Floating Action Button in Flutter?

  • `Positioned`
  • Neither `Stack` nor `Positioned` are suitable.
  • Both `Stack` and `Positioned` are suitable.
  • `Stack` (correct)

    • What is the purpose of the TextField in Flutter?

  • To provide a visual representation of a text file.
  • To allow users to input text data and interact with the app. (correct)
  • To display text to the user.
  • To format and display text in various styles.

    • How can you change the size of a Floating Action Button in Flutter?

    <p>By wrapping the Floating Action Button in a <code>SizedBox</code> widget with custom height and width. (A), By setting parameters for height and width directly in the <code>FloatingActionButton</code> widget. (D)</p> Signup and view all the answers

    What is the function of the centerTitle property in the AppBar widget?

    <p>It centers the title within the <code>AppBar</code>. (D)</p> Signup and view all the answers

    How can you create a floating action button with an icon and text in Flutter?

    <p>By using the <code>FloatingActionButton.extended</code> widget with an <code>icon</code> and <code>label</code> property. (C)</p> Signup and view all the answers

    What widget represents the body of a screen in Flutter's layout?

    <p>The <code>Scaffold</code> widget's <code>body</code> property. (C)</p> Signup and view all the answers

    Where in the Flutter widget tree would you find the AppBar?

    <p>The <code>AppBar</code> is a direct child of the <code>Scaffold</code> widget. (A)</p> Signup and view all the answers

    Which of the following properties can be used to make a text field's border rounded?

    <p>borderRadius (C)</p> Signup and view all the answers

    How can you remove the decoration entirely from a text field using the InputDecoration property?

    <p>Set the decoration property to null (D)</p> Signup and view all the answers

    What is the purpose of the TextFormField widget?

    <p>To wrap a <code>TextField</code> and integrate it with a form (A)</p> Signup and view all the answers

    What is the purpose of the maxLength property in a text field?

    <p>To set the maximum number of characters allowed in the text field (C)</p> Signup and view all the answers

    Which of the following widgets provides functionalities like validation and integration with other form field widgets?

    <p>TextFormField (D)</p> Signup and view all the answers

    In the provided example, what is the purpose of the prefixIcon property within the InputDecoration?

    <p>To display a visual icon before the text input field (D)</p> Signup and view all the answers

    Which property controls the size of the border for a TextField widget?

    <p>borderSide (B)</p> Signup and view all the answers

    What is a common way to visually distinguish a password field from a regular text field?

    <p>Using an icon to indicate a password (D)</p> Signup and view all the answers

    Flashcards

    Scaffold

    A top-level container for app layout in Flutter.

    Floating Action Button

    A circular button for primary actions in Flutter apps.

    TextField

    A widget that allows text input from users in Flutter.

    Size of Floating Action Button

    Can be changed by wrapping with SizedBox or constants.

    Signup and view all the flashcards

    Change Floating Action Button Color

    Modify the button color through its properties.

    Signup and view all the flashcards

    BeveledRectangleBorder

    Used to create non-circular shapes for Floating Action Button.

    Signup and view all the flashcards

    TextFormField

    An enhanced text input field that handles validation.

    Signup and view all the flashcards

    Extending Floating Action Button

    Create a wider button that can include text and icon.

    Signup and view all the flashcards

    OutlineInputBorder

    A border style that outlines the TextField widget.

    Signup and view all the flashcards

    UnderlineInputBorder

    A border that places a line under the TextField.

    Signup and view all the flashcards

    Prefix Icon

    An icon displayed at the start of a TextField.

    Signup and view all the flashcards

    Max Length Property

    Limits the number of characters accepted in a text field.

    Signup and view all the flashcards

    Decoration Nullification

    Removing decoration from a TextField, including underline and label space.

    Signup and view all the flashcards

    Padding in Widgets

    Space added around a widget to separate it from others.

    Signup and view all the flashcards

    Study Notes

    Scaffolding & Widget Tree, TextField

    • Flutter UI and more is the overarching topic.
    • Scaffold provides the basic structure of a Flutter app.
    • The Widget Tree visually represents the hierarchical structure of widgets in an app.
    • TextFields are used for user input of text.
    • Important Widgets include, Scaffold, AppBar, Center, Column, Text, and FloatingActionButton.
    • Code snippets illustrate the implementation of these widgets in Flutter.
    • Building a Flutter UI involves understanding how widgets are arranged in the Widget Tree.

    Locating AppBar in Widget Tree

    • The AppBar widget is part of the Scaffold widget.
    • It sits at the top of the screen and holds the title of the app.
    • Code examples display how to set and use the AppBar.

    After Title is Added... Widget Tree

    • Adding a title to the AppBar results in changes reflecting in the Widget Tree.
    • The Text widget now displays the title within its AppBar location.

    CenterTitle: true Is it a Widget?

    • centerTitle: true is a property for positioning the title within the AppBar and not a widget itself.
    • It centers the title text within the AppBar.

    Body: is it similar to <BODY> in HTML?

    • The body in Flutter is analogous to the <body> tag in HTML.
    • It holds the main content of the application.
    • The body fills the screen space below the AppBar.

    Column widget has two more widgets. What alignment is followed?

    • Flutter's Column widget arranges child widgets vertically.
    • mainAxisAlignment: MainAxisAlignment.center centers all elements vertically within the column.
    • The CrossAxisAlignment property determines child alignment along the cross axis (horizontal, in this case).

    FloatingActionButton

    • A FloatingActionButton is a circular button used for actions.
    • Properties like onPressed and child define its functionality and content.

    FloatingActionButton Sample

    • Code for changing and styling the shape and color of a FloatingActionButton.
    • Colors and other formatting options are possible to modify its appearance.

    FloatingActionButton: How to change the Size?

    • The SizedBox widget wraps a FloatingActionButton and allows customization of size (height, width).

    Output: FloatingActionButton Sample

    • Examples of FloatingActionButton with differing sizes (Small, Regular, Large, Extended).

    Draggable FloatingActionButton

    • The container for a draggable FloatingActionButton is the DraggableFab widget.

    TextField

    • TextField enables text input in a Flutter app.
    • It's used primarily for forms, messaging, and search features.
    • TextField can use InputDecoration for customization like borders, labels, and hints.

    TextField: Password

    • Implementing a TextField for sensitive inputs (passwords) using obscureText: true.
    •  obscuringCharacter specifies the character displayed in place of the typed character

    TextField:

    • Flutter Scaffold structure explanation along with examples.
    • Creating and utilizing TextField within the Scaffold app structure.
    • Demonstrating the use of the onChanged parameter within a TextField.

    String txt=""

    • Declares a variable txt as String to handle the input text from a TextField.
    • The onChanged method updates txt with the user's input in the TextField.

    Validating Input with error messages

    • Methods and techniques for validating user input in a TextField.

    Max characters

    • The maxLength property for restricting the number of characters entered in a TextField.

    References

    • Links to external documentation, tutorials, and resources regarding Flutter widgets and concepts.

    Overview Flutter & Firebase

    • Firebase is a server-side platform that provides various services for apps.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Flutter Scaffolding Tutorial PDF

    Description

    Test your knowledge on Flutter's UI components, including Floating Action Buttons, TextFields, and the AppBar widget. This quiz covers functions, properties, and customization techniques related to these essential elements in Flutter development.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser