Drawer navigation in Flutter - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a drawer to the Scaffold widget.

Flutter

Scaffold(
  appBar: AppBar(title: Text('Home')),
  drawer: [1],
  body: Center(child: Text('Welcome')),
)

Drag options to blanks, or click blank then click option'

ADrawer()

BContainer()

CAppBar()

DListView()

Attempts:

3 left

💡 Hint

Common Mistakes

Using Container or AppBar instead of Drawer.

Forgetting to add the drawer property.

The drawer property of Scaffold expects a Drawer widget to show the side menu.

2fill in blank

medium

Complete the code to add a list of items inside the drawer.

Flutter

Drawer(
  child: [1](
    children: [
      ListTile(title: Text('Item 1')),
      ListTile(title: Text('Item 2')),
    ],
  ),
)

Drag options to blanks, or click blank then click option'

ARow

BContainer

CColumn

DListView

Attempts:

3 left

💡 Hint

Common Mistakes

Using Column which does not scroll by default.

Using Row which arranges items horizontally.

Use ListView inside the drawer to allow scrolling if items overflow.

3fill in blank

hard

Fix the error in the code to close the drawer when an item is tapped.

Flutter

ListTile(
  title: Text('Close Drawer'),
  onTap: () {
    Navigator.of(context).[1]();
  },
)

Drag options to blanks, or click blank then click option'

Apop

Bpush

CpushReplacement

DpopUntil

Attempts:

3 left

💡 Hint

Common Mistakes

Using push which adds a new route instead of closing.

Using popUntil without a proper predicate.

Use Navigator.of(context).pop() to close the drawer by popping it from the navigation stack.

4fill in blank

hard

Fill both blanks to create a drawer header with a title and background color.

Flutter

Drawer(
  child: ListView(
    children: [
      DrawerHeader(
        decoration: BoxDecoration(color: [1]),
        child: Text([2], style: TextStyle(color: Colors.white, fontSize: 24)),
      ),
    ],
  ),
)

Drag options to blanks, or click blank then click option'

AColors.blue

B'My App'

CColors.red

D'Header'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string instead of a color for decoration.

Using a color instead of a string for the text.

The decoration uses Colors.blue for background color, and the header text is 'My App'.

5fill in blank

hard

Fill all three blanks to navigate to a new page and close the drawer on tap.

Flutter

ListTile(
  title: Text('Go to Settings'),
  onTap: () {
    Navigator.of(context).[1](MaterialPageRoute(builder: (context) => [2]()));
    Navigator.of(context).[3]();
  },
)

Drag options to blanks, or click blank then click option'

Apush

BSettingsPage

Cpop

DpushReplacement

Attempts:

3 left

💡 Hint

Common Mistakes

Using pushReplacement which replaces the current page.

Not closing the drawer after navigation.

Use push to open the new page SettingsPage(), then pop() to close the drawer.

Practice

1. What is the main purpose of using a Drawer in a Flutter app?

easy

A. To create a floating action button

B. To display a bottom navigation bar

C. To show a popup dialog

D. To provide a hidden side menu accessible by swipe or icon tap

Solution

1. Step 1: Understand Drawer usage

   A Drawer is a panel that slides from the side to show navigation options.

2. Step 2: Compare with other UI elements

   Bottom bars, dialogs, and buttons serve different purposes than a Drawer.

3. Final Answer:

   To provide a hidden side menu accessible by swipe or icon tap -> Option D

4. Quick Check:

   Drawer = hidden side menu [OK]

Hint: Drawer means side menu, not bottom or popup [OK]

Common Mistakes:

• Confusing Drawer with bottom navigation
• Thinking Drawer is a popup dialog
• Mixing Drawer with floating buttons

2. Which Flutter widget property is used to add a drawer to a screen?

easy

A. navigationDrawer

B. sideMenu

C. drawer

D. menuPanel

Solution

1. Step 1: Identify Scaffold properties

   The Scaffold widget has a property named drawer to add a side drawer.

2. Step 2: Check other options

   Properties like sideMenu, navigationDrawer, or menuPanel do not exist in Scaffold.

3. Final Answer:

   drawer -> Option C

4. Quick Check:

   Scaffold.drawer adds the drawer [OK]

Hint: Use Scaffold.drawer to add a drawer [OK]

Common Mistakes:

• Using non-existent properties like sideMenu
• Trying to add drawer outside Scaffold
• Confusing drawer with appBar property

3. What will happen if you run this Flutter code snippet?

Scaffold(
  appBar: AppBar(title: Text('Home')),
  drawer: Drawer(
    child: ListView(
      children: [
        DrawerHeader(child: Text('Menu')),
        ListTile(title: Text('Item 1')),
        ListTile(title: Text('Item 2')),
      ],
    ),
  ),
  body: Center(child: Text('Welcome')),
)

medium

A. App shows a screen with an app bar, a drawer accessible by swipe or icon, and a centered welcome text

B. App crashes because DrawerHeader cannot be inside ListView

C. App shows only the drawer without the app bar or body

D. App shows an error because ListTile requires onTap callback

Solution

1. Step 1: Analyze Scaffold structure

   The Scaffold has an appBar, a drawer with a header and list items, and a body with centered text.

2. Step 2: Check widget usage

   DrawerHeader inside ListView is valid. ListTile without onTap is allowed but not interactive.

3. Final Answer:

   App shows a screen with an app bar, a drawer accessible by swipe or icon, and a centered welcome text -> Option A

4. Quick Check:

   Drawer with header and items works as expected [OK]

Hint: DrawerHeader inside ListView is valid; ListTile onTap optional [OK]

Common Mistakes:

• Thinking DrawerHeader cannot be inside ListView
• Assuming ListTile must have onTap
• Expecting drawer to show automatically without user action

4. Identify the error in this Flutter code that prevents the drawer from opening:

Scaffold(
  appBar: AppBar(
    title: Text('App'),
    leading: IconButton(
      icon: Icon(Icons.menu),
      onPressed: () {
        Scaffold.of(context).openDrawer();
      },
    ),
  ),
  drawer: Drawer(child: Text('Menu')),
  body: Center(child: Text('Content')),
)

medium

A. Drawer widget is missing a ListView

B. Using Scaffold.of(context) inside appBar's leading causes context error

C. IconButton icon is incorrect for drawer

D. Body widget should be a ListView for drawer to work

Solution

1. Step 1: Understand context usage in Scaffold

   Calling Scaffold.of(context) inside appBar's leading uses a context that is above Scaffold, causing an error.

2. Step 2: Identify correct way to open drawer

   Use a Builder widget or a GlobalKey to get a context below Scaffold to open drawer properly.

3. Final Answer:

   Using Scaffold.of(context) inside appBar's leading causes context error -> Option B

4. Quick Check:

   Context must be below Scaffold to open drawer [OK]

Hint: Scaffold.of(context) needs context inside Scaffold, not appBar [OK]

Common Mistakes:

• Assuming drawer needs ListView to open
• Thinking icon choice affects drawer opening
• Believing body widget type affects drawer

5. You want to create a drawer with a header and three clickable items that navigate to different screens. Which code snippet correctly implements this behavior? A)

Drawer(
  child: Column(
    children: [
      DrawerHeader(child: Text('Header')),
      ListTile(title: Text('Screen 1'), onTap: () { Navigator.popAndPushNamed(context, '/screen1'); }),
      ListTile(title: Text('Screen 2'), onTap: () { Navigator.popAndPushNamed(context, '/screen2'); }),
      ListTile(title: Text('Screen 3'), onTap: () { Navigator.popAndPushNamed(context, '/screen3'); }),
    ],
  ),
)

B)

Drawer(
  child: ListView(
    children: [
      DrawerHeader(child: Text('Header')),
      ListTile(title: Text('Screen 1')),
      ListTile(title: Text('Screen 2')),
      ListTile(title: Text('Screen 3')),
    ],
  ),
)

C)

Drawer(
  child: ListView(
    children: [
      DrawerHeader(child: Text('Header')),
      ListTile(title: Text('Screen 1'), onTap: () { Navigator.pop(context); }),
      ListTile(title: Text('Screen 2'), onTap: () { Navigator.pop(context); }),
      ListTile(title: Text('Screen 3'), onTap: () { Navigator.pop(context); }),
    ],
  ),
)

D)

Drawer(
  child: Column(
    children: [
      DrawerHeader(child: Text('Header')),
      ListTile(title: Text('Screen 1'), onTap: () { Navigator.pushNamed(context, '/screen1'); }),
      ListTile(title: Text('Screen 2'), onTap: () { Navigator.pushNamed(context, '/screen2'); }),
      ListTile(title: Text('Screen 3'), onTap: () { Navigator.pushNamed(context, '/screen3'); }),
    ],
  ),
)

hard

A. Uses Column with onTap that closes drawer and navigates correctly

B. Uses ListView but ListTiles have no onTap, so no navigation

C. Uses ListView with onTap only closing drawer, no navigation

D. Uses Column with onTap navigating to screens but does not close drawer

Solution

1. Step 1: Check navigation and drawer closing

   To navigate and close drawer, use Navigator.popAndPushNamed inside onTap.

2. Step 2: Compare layout widgets

   Column works but may cause overflow; ListView is better for scrolling but not required here.

3. Step 3: Evaluate options

   Column with pushNamed navigates but drawer stays open; ListView without onTap has no navigation; ListView with pop only closes drawer; Column with popAndPushNamed closes drawer and navigates properly.

4. Final Answer:

   Uses Column with onTap that closes drawer and navigates correctly -> Option A

5. Quick Check:

   popAndPushNamed closes drawer and navigates [OK]

Hint: Use popAndPushNamed to close drawer and navigate [OK]

Common Mistakes:

• Not closing drawer before navigation
• Missing onTap handlers on ListTile
• Using Navigator.pop only closes drawer without navigation