我使用过cordova文件传输协议,并使用下载功能下载base-64图像。当我把远程服务器路径放在" https://upload.wikimedia.org/wikipedia/commons/4/4a/Logo_2013_Google.png"然后它下载,但当我把base-64图像pah放在文件路径上然后它不下载。 我不知道base-64转换。请帮助。
----我的代码低于----
function download(){
var imageData = image.src;
imageData = imageData.replace('data:image/png;base64,', '');
var d = new Date();
var imageName = "sample" + d.getTime() + ".png";
//var filepath = encodeURI("https://upload.wikimedia.org/wikipedia/commons/4/4a/Logo_2013_Google.png");
var filepath = encodeURI(imageData);
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function (fileSystem) {
fileSystem.root.getFile(imageName, { create: true, exclusive: true }, function (fileEntry) {
// get the full path to the newly created file on the device
var localPath = fileEntry.fullPath;
// massage the path for android devices (not tested)
if (device.platform === "Android" && localPath.indexOf("file://") === 0) {
localPath = localPath.substring(7);
}
// download the remote file and save it
var remoteFile = filepath;
var fileTransfer = new FileTransfer();
fileTransfer.download(remoteFile, localPath, function (newFileEntry) {
// successful download, continue to the next image
console.log('successful download');
},
function (error) { // error callback for #download
console.log('Error with #download method.', error);
});
});
})
})
}
}
提前致谢。
答案 0 :(得分:1)
我找到了自己问题的解决方案。
首先,我已将base64图像转换为文件流,并使用webservices在服务器上创建图像,并在服务器上上传图像,并使用cordova filetransfer获取该服务器路径并下载。
我的代码低于
=>用于将base64图像转换为图像的Web服务代码
string strImg = imageData.imageData;
string fullName = "d:\\uploadimages";
FileStream fs = new FileStream(fullName, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
byte[] data = Convert.FromBase64String(strImg);
bw.Write(data);
bw.Close();
=>在手机上下载图片
function download()
{
var filepath = encodeURI("http://www.telerik.com/sfimages/default-source/logos/app_builder.png"),
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function (fileSystem) {
fileSystem.root.getFile("sample.jpg", { create: true, exclusive: false }, function (fileEntry) {
// get the full path to the newly created file on the device
var localPath = fileEntry.fullPath;
// massage the path for android devices (not tested)
if (device.platform === "Android" && localPath.indexOf("file://") === 0) {
localPath = localPath.substring(7);
}
// download the remote file and save it
var remoteFile = filepath;
//loadingOverlay.displayLoading("Image will be save on your device.");
var fileTransfer = new FileTransfer();
fileTransfer.download(remoteFile, localPath, function (newFileEntry) {
// successful download, continue to the next image
var dwnldImagePath = newFileEntry.fullPath;
console.log('successful download');
},
function (error) { // error callback for #download
console.log('Error with #download method.', error);
});
});
function(error) { // error callback for #getFile
console.log('Error with #getFile method.', error);
});
})
}