Phonegap-将图片从url保存到设备照片库中

这是任何人都可以使用的文件下载代码。您只有三个参数可以像这样使用-

1） 网址

2）您要在SD卡中创建的 文件夹名称

3） 文件名 （您可以给文件起任何名字）

可以使用此代码下载所有类型的文件。您可以将其用作.js，并且

IOS

//First step check parameters mismatch and checking network connection if available call    download functionfunction DownloadFile(URL, Folder_Name, File_Name) {//Parameters mismatch checkif (URL == null && Folder_Name == null && File_Name == null) {    return;}else {    //checking Internet connection availablity    var networkState = navigator.connection.type;    if (networkState == Connection.NONE) {        return;    } else {        download(URL, Folder_Name, File_Name); //If available download function call    }  }}

//第二步获得写权限和文件夹创建

function download(URL, Folder_Name, File_Name) {//step to request a file system     window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, fileSystemSuccess, fileSystemFail);function fileSystemSuccess(fileSystem) {    var download_link = enpreURI(URL);    ext = download_link.substr(download_link.lastIndexOf('.') + 1); //Get extension of URL    var directoryEntry = fileSystem.root; // to get root path of directory    directoryEntry.getDirectory(Folder_Name, { create: true, exclusive: false }, onDirectorySuccess, onDirectoryFail); // creating folder in sdcard    var rootdir = fileSystem.root;    var fp = rootdir.fullPath; // Returns Fulpath of local directory    fp = fp + "/" + Folder_Name + "/" + File_Name + "." + ext; // fullpath and name of the file which we want to give    // download function call    filetransfer(download_link, fp);}function onDirectorySuccess(parent) {    // Directory created successfuly}function onDirectoryFail(error) {    //Error while creating directory    alert("Unable to create new directory: " + error.pre);}  function fileSystemFail(evt) {    //Unable to access file system    alert(evt.target.error.pre); }}

//将文件下载到创建的文件夹的第三步

function filetransfer(download_link, fp) {var fileTransfer = new FileTransfer();// File download function with URL and local pathfileTransfer.download(download_link, fp,         function (entry) {  alert("download complete: " + entry.fullPath);         },      function (error) {          //Download abort errors or download failed errors          alert("download error source " + error.source);          //alert("download error target " + error.target);          //alert("upload error pre" + error.pre);      } );}

有用的链接