Cordova / PhoneGap照片文件大小 [英] Cordova/PhoneGap Photo File Size

问题描述

全部，

我尝试使用PhoneGap / Cordova获取照片的文件大小（即不是尺寸，而是磁盘中的实际文件大小）到目前为止，我唯一能找到的方法是通过base64转换，然后对b64字符串的字节进行基本算术。然而，我想知道是否有一个更优雅的方式来获取文件大小。 TIA。

I'm trying to get the file size (i.e. not the dimensions, but the actual file size in disk) of a photo using PhoneGap/Cordova 2. So far, the only way I can figure it out is through base64 conversion, then basic arithmetic on the bytes of the b64 string. However, I was wondering if there is a more elegant way to get file size. TIA.

澄清：它必须适用于iOS 5和Android 2.3。

clarification: it must work on iOS 5 and Android 2.3.

推荐答案

是的，如果你有来自Camera.getPicture命令的图像的URL，你将它传递给window.resolveLocalFileSystemURL命令谁成功回调用FileEntry对象调用。然后你调用FileEntry的file方法，使用File对象调用成功回调，然后你可以看看File对象的size属性。

Yeah, if you have the URL to the image from the Camera.getPicture command you pass it to the window.resolveLocalFileSystemURL command who's success callback is called with a FileEntry object. Then you call the "file" method of FileEntry which calls the success callback with a File object then you can look at the size property of the File object.

有点像。 ...

function takePhoto() {
    navigator.camera.getPicture(gotPhoto, onError, { quality: 50,
        destinationType: navigator.camera.DestinationType.FILE_URI,
        sourceType: navigator.camera.PictureSourceType.CAMERA });
}

function gotPhoto(imageUri) {
    window.resolveLocalFileSystemURI(imageUri, function(fileEntry) {
        fileEntry.file(function(fileObj) {
            console.log("Size = " + fileObj.size);
        });
    });
}

这应该可以工作，但我只是写了我的头顶的代码。

that should work but I just wrote the code off the top of my head.

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