A Camera View control and a Barcode Endode/Decode control (based on ZXing.Net) for .NET MAUI applications.
CameraView
A ContetView control for camera management with the next properties:
Android
iOS/Mac
Windows
Preview
✅
✅
✅
Mirror preview
✅
✅
✅
Flash
✅
✅
✅
Torch
✅
✅
✅
Zoom
✅
✅
✅
Take snapshot
✅
✅
✅
Save snapshot
✅
✅
✅
Barcode detection/decode
✅
✅
✅
Video/audio recording
✅
✅
✅
Take Photo
✅
✅
✅
Install and configure CameraView
Download and Install Camera.MAUI NuGet package on your application.
Download and Install Camera.MAUI.ZXing NuGet package on your application (if you want Barcode detection/decode with ZXing).
Initialize the plugin in your MauiProgram.cs:
// Add the using to the top
using Camera.MAUI;
public static MauiApp CreateMauiApp()
{
var builder = MauiApp.CreateBuilder();
builder
.UseMauiApp<App>()
.UseMauiCameraView(); // Add the use of the plugging
return builder.Build();
}
Add camera/microphone permissions to your application:
Android
In your AndroidManifest.xml file (Platforms\Android) add the following permission:
In your info.plist file (Platforms\iOS / Platforms\MacCatalyst) add the following permission:
<key>NSCameraUsageDescription</key>
<string>This app uses camera for...</string>
<key>NSMicrophoneUsageDescription</key>
<string>This app needs access to the microphone for record videos</string>
Make sure that you enter a clear and valid reason for your app to access the camera. This description will be shown to the user.
Windows
In your Package.appxmanifest file (Platforms\Windows) go to Capabilities and mark Web Camera and Microphone.
For more information on permissions, see the Microsoft Docs.
Using CameraView
In XAML, make sure to add the right XML namespace:
CameraInfo type (Camera Property):
CameraInfo has the next properties:
public string Name
public string DeviceId
public CameraPosition Position
public bool HasFlashUnit
public float MinZoomFactor
public float MaxZoomFactor
public float HorizontalViewAngle
public float VerticalViewAngle
public List<Size> AvailableResolutions
Start camera playback:
if (await cameraView.StartCameraAsync(new Size(1280, 720)) == CameraResult.Success)
{
playing = true;
}
Stop camera playback:
if (await cameraView.StopCameraAsync() == CameraResult.Success)
{
playing = false;
}
if (cameraView.MaxZoomFactor >= 2.5f)
cameraView.ZoomFactor = 2.5f;
Get a snapshot from the playback
ImageSource imageSource = cameraView.GetSnapShot(ImageFormat.PNG);
bool result = cameraView.SaveSnapShot(ImageFormat.PNG, filePath);
Record a video:
var result = await cameraView.StartRecordingAsync(Path.Combine(FileSystem.Current.CacheDirectory, "Video.mp4"), new Size(1920, 1080));
....
result = await cameraView.StopRecordingAsync();
Take a photo
var stream = await cameraView.TakePhotoAsync();
if (stream != null)
{
var result = ImageSource.FromStream(() => stream);
snapPreview.Source = result;
}
Use Control with MVVM:
The control has several binding properties for take an snapshot:
/// Binding property for use this control in MVVM.
public CameraView Self
/// Sets how often the SnapShot property is updated in seconds.
/// Default 0: no snapshots are taken
/// WARNING! A low frequency directly impacts over control performance and memory usage (with AutoSnapShotAsImageSource = true)
/// </summary>
public float AutoSnapShotSeconds
/// Sets the snaphost image format
public ImageFormat AutoSnapShotFormat
/// Refreshes according to the frequency set in the AutoSnapShotSeconds property (if AutoSnapShotAsImageSource is set to true) or when GetSnapShot is called or TakeAutoSnapShot is set to true
public ImageSource SnapShot
/// Refreshes according to the frequency set in the AutoSnapShotSeconds property or when GetSnapShot is called.
/// WARNING. Each time a snapshot is made, the previous stream is disposed.
public Stream SnapShotStream
/// Change from false to true refresh SnapShot property
public bool TakeAutoSnapShot
/// If true SnapShot property is refreshed according to the frequency set in the AutoSnapShotSeconds property
public bool AutoSnapShotAsImageSource
/// Starts/Stops the Preview if camera property has been set
public bool AutoStartPreview
{
get { return (bool)GetValue(AutoStartPreviewProperty); }
set { SetValue(AutoStartPreviewProperty, value); }
}
/// Full path to file where record video will be recorded.
public string AutoRecordingFile
{
get { return (string)GetValue(AutoRecordingFileProperty); }
set { SetValue(AutoRecordingFileProperty, value); }
}
/// Starts/Stops record video to AutoRecordingFile if camera and microphone properties have been set
public bool AutoStartRecording
{
get { return (bool)GetValue(AutoStartRecordingProperty); }
set { SetValue(AutoStartRecordingProperty, value); }
}
Use the event or the bindable property BarCodeResults
/// Event launched every time a code is detected in the image if "BarCodeDetectionEnabled" is set to true.
public event BarcodeResultHandler BarcodeDetected;
/// It refresh each time a barcode is detected if BarCodeDetectionEnabled porperty is true
public Result[] BarCodeResults
BarcodeImage
A ContentView control for generate codebars images.
In XAML, make sure to add the right XML namespace: