捕获相机提要 .net maui

Question

I'm new to Xamarin and Maui, I've been working on an app and now I need a way to access the camera feed.

I want to be able to preview the camera, for android first, within the app and capture an image when a buton is pressed. I have it working with the native camera app (media selector) but this isn't what would fulfil my requirements.

I've been trying to use handlers with Android camera X to get a preview view on the layout but I just can't crack it, there's hardly any direction on building one from the ground up. Does anyone have any experience with this that might be able to point me in the right direction?

Answer 1

You can try to use .NET Multi-platform App UI (.NET MAUI) IMediaPicker interface . This interfaces lets a user pick or take a photo or video on the device。

To get photo, use code like:

FileResult photo = await MediaPicker.Default.CapturePhotoAsync();

Answer 2

我有同样的问题，我在想可能是为 Android 和 iOS 使用一些本机库，并有一个类库来捕获框架并尝试在 Maui 项目的视图中显示它

Answer 3

ANSWER: I ended up creating a custom handler for maui and building my own view using native android. Built the view using xamarin in c#. Then used an interface to call back to the handler that an image had been taken.

Answer 4

I have this working in Android and iOS. I thought I should post here in case anyone might have a need for this. There are some Catch22s that I'll mention later.

In this first code block you'll see the code for the View. I've called it CameraPerson because there is a Person image overlay. This is the code that gets put in the RootFolder or a non-Platform folder. I put mine in a folder called MultiTargeting.

using System.ComponentModel;
public class CameraPerson : View
{
    public CameraPerson()
    {

    }

    public enum IMAGE_TYPE
    {
        Profile,
        Wound
    }

    public enum CAMERA_TYPE
    {
        Forward,
        Back
    }

    public static readonly BindableProperty ImageTypeProperty =
        BindableProperty.Create(nameof(ImageType), typeof(IMAGE_TYPE), typeof(CameraPerson), IMAGE_TYPE.Wound);

    public static readonly BindableProperty PatientIdProperty =
        BindableProperty.Create(nameof(PatientId), typeof(int), typeof(CameraPerson), 0);

    public static readonly BindableProperty CameraTypeProperty =
        BindableProperty.Create(nameof(CameraType), typeof(CAMERA_TYPE), typeof(CameraPerson), CAMERA_TYPE.Back);

    public static readonly BindableProperty LocalIdProperty =
        BindableProperty.Create(nameof(LocalId), typeof(long), typeof(CameraPerson), null);


    public IMAGE_TYPE ImageType
    {
        get { return (IMAGE_TYPE)GetValue(ImageTypeProperty); }
        set { SetValue(ImageTypeProperty, value); }
    }

    public int PatientId
    {
        get { return (int)GetValue(PatientIdProperty); }
        set { SetValue(PatientIdProperty, value); }
    }

    public CAMERA_TYPE CameraType
    {
        get { return (CAMERA_TYPE)GetValue(CameraTypeProperty); }
        set { SetValue(CameraTypeProperty, value); }
    }

    public long LocalId
    {
        get { return (long)GetValue(LocalIdProperty); }
        set { SetValue(LocalIdProperty, value); }
    }
}

To be continued as I'm limited to character counts.

Answer 5

Any updates on this? @aktikt1?