从 Widget 或 Canvas 创建原始图像 [英] Creating raw image from Widget or Canvas

问题描述

我的最终目标是能够通过传递原始图像数据或将图像保存到磁盘以供本机 android/ios 服务共享来共享动态图像.我如何将 flutter 中的 Widget 或 Canvas 转换为原始图像数据(如 byte[])?

My end goal is to be able to share a dynamic image by either passing the raw image data or saving the image to disk for a native android/ios service to share. How would I convert a Widget or Canvas in flutter to raw image data (like byte[])?

推荐答案

现在有支持.您可以使用 RenderRepaintBoundry 或 OffsetLayer 或 Scene.它们都有一个 toImage.这是RenderRepaintBoundry.toImage()

There is support for this now. You can either use RenderRepaintBoundry or OffsetLayer or Scene. They all have a toImage. Here is the link to RenderRepaintBoundry.toImage()

  Future<void> _capturePng() async {
    RenderRepaintBoundary boundary = globalKey.currentContext.findRenderObject();
    ui.Image image = await boundary.toImage();
    ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
    Uint8List pngBytes = byteData.buffer.asUint8List();
    print(pngBytes);
  }

这是从文档中复制的.

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