英文:
How to set maximum size of image from image Picker in Flutter
问题
这是我的代码
chooseImage() async {
XFile? pickedFile = await ImagePicker().pickImage(
source: ImageSource.gallery,
);
imagePath = await pickedFile!.readAsBytes();
}
英文:
this is my code
chooseImage() async {
XFile? pickedFile = await ImagePicker().pickImage(
source: ImageSource.gallery,
);
imagePath = await pickedFile!.readAsBytes();
}
答案1
得分: 2
如果您想完全阻止超过特定大小的文件，您可以使用其长度属性来检查文件的大小，并相应处理结果。
chooseImage() async {
var maxFileSizeInBytes = 2 * 1048576; // 2MB（您可能希望将此值放在函数外部，以便在其他地方重复使用）
XFile? pickedFile = await ImagePicker().pickImage(
source: ImageSource.gallery,
);
var imagePath = await pickedFile!.readAsBytes();
var fileSize = imagePath.length; // 获取文件大小（字节）
if (fileSize <= maxFileSizeInBytes) {
// 文件大小合适，上传/使用它
} else {
// 文件太大，要求用户上传较小的文件，或者压缩文件/图像
}
}
英文:
If you want to completely block files over a certain size, you can check the size of the file using it's length property, and handle the result accordingly
chooseImage() async {
var maxFileSizeInBytes = 2 * 1048576; // 2MB (You'll probably want this outside of this function so you can reuse the value elsewhere)
XFile? pickedFile = await ImagePicker().pickImage(
source: ImageSource.gallery,
);
var imagePath = await pickedFile!.readAsBytes();
var fileSize = imagePath.length; // Get the file size in bytes
if (fileSize <= maxFileSizeInBytes) {
// File is the right size, upload/use it
} else {
// File is too large, ask user to upload a smaller file, or compress the file/image
}
}
答案2
得分: 1
你可以使用 imageQuality 属性。质量越高，图像文件大小越大。
chooseImage() async {
XFile? pickedFile = await ImagePicker().pickImage(
source: ImageSource.gallery,
imageQuality: 50, // 将质量设置为 50%
);
imagePath = await pickedFile!.readAsBytes();
}
英文:
You can use imageQuality properties. The higher the quality, the larger the file size of the image.
chooseImage() async {
XFile? pickedFile = await ImagePicker().pickImage(
source: ImageSource.gallery,
imageQuality: 50, // Set the quality to 50%
);
imagePath = await pickedFile!.readAsBytes();
}
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