xamarin - FFImageLoading 将位图加载到 ImageViewAsync 中

Question

如何将位图加载到 Xamarin Android Native 上的 ImageViewAsync 中？

Answer 1

您可以使用LoadStream方法，here您将看到如何使用此方法:

ImageService.Instance
            .LoadStream (GetStreamFromImageByte)
            .Into (imageView);

这是GetStreamFromImageByte:

Task<Stream> GetStreamFromImageByte (CancellationToken ct)
{
    //Here you set your bytes[] (image)
    byte [] imageInBytes = null;

    //Since we need to return a Task<Stream> we will use a TaskCompletionSource>
    TaskCompletionSource<Stream> tcs = new TaskCompletionSource<Stream> ();

    tcs.TrySetResult (new MemoryStream (imageInBytes));

    return tcs.Task;
}

关于imageInBytes，你可以看看here ，将位图转换为byte[]:

MemoryStream stream = new MemoryStream();
bitmap.Compress(Bitmap.CompressFormat.Png, 100, stream);
byte[] bitmapData = stream.ToArray();

我已在 github 上发布了我的演示.