Camera access in Flutter - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Flutter camera package.

Flutter

import 'package:[1]/camera.dart';

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

Acamera

Bflutter_camera

Cflutter_camera_plugin

Dcamera_access

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong or non-existent package name.

Forgetting to import the camera package.

The correct package to import for camera access in Flutter is camera.

2fill in blank

medium

Complete the code to get the list of available cameras asynchronously.

Flutter

final cameras = await [1].availableCameras();

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AavailableCameras

BCamera

CCameraController

Attempts:

3 left

💡 Hint

Common Mistakes

Calling availableCameras() on the wrong class or instance.

Not using await for the asynchronous call.

The availableCameras() method is called on the Camera class to get the list of cameras.

3fill in blank

hard

Fix the error in initializing the CameraController with the first camera and resolution preset.

Flutter

controller = CameraController(cameras[[1]], ResolutionPreset.high);

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A1

Bnull

C-1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 1 which may cause an out-of-range error.

Using negative or null index.

The first camera in the list is at index 0, so use cameras[0].

4fill in blank

hard

Complete the code to start the camera controller asynchronously and update the UI after initialization.

Flutter

await controller.[1]();
setState(() => {});

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Ainitialize

B=>

C{}

D()

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the wrong method to start the controller.

Using incorrect syntax for setState callback.

Call initialize() to start the controller, then use setState(() => {}) to refresh the UI.

5fill in blank

hard

Fill all three blanks to display the camera preview widget inside a container with full width and height.

Flutter

return Container(
  width: double.[1],
  height: double.[2],
  child: CameraPreview([3]),
);

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Ainfinity

Binfinite

Ccontroller

Dcontroller.value

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'infinite' instead of 'infinity'.

Passing the wrong object to CameraPreview.

Use double.infinity for full width and height, and pass the controller to CameraPreview.