【发布时间】:2020-07-19 09:18:20
【问题描述】:
【问题讨论】:
标签: image flutter dart screenshot
【问题讨论】:
标签: image flutter dart screenshot
在article 中,将 GlobalKey 与您的小部件一起使用并通过以下代码保存图像:
takeScreenShot() async {
RenderRepaintBoundary boundary =
previewContainer.currentContext.findRenderObject();
double pixelRatio = originalSize / MediaQuery.of(context).size.width;
ui.Image image = await boundary.toImage(pixelRatio: pixelRatio);
ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
Uint8List pngBytes = byteData.buffer.asUint8List();
setState(() {
_image2 = Image.memory(pngBytes.buffer.asUint8List());
});
final directory = (await getApplicationDocumentsDirectory()).path;
File imgFile = new File('$directory/screenshot.png');
imgFile.writeAsBytes(pngBytes);
final snackBar = SnackBar(
content: Text('Saved to ${directory}'),
action: SnackBarAction(
label: 'Ok',
onPressed: () {
// Some code
},
),
);
Scaffold.of(context).showSnackBar(snackBar);
}
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