我正在开发phonegap应用程序,我需要将图像从URL保存到设备照片库.
我在Phonegap Api上找不到这样做的方法,而且我没有为此找到phonegap插件.
我需要它与Iphone和Android合作
非常感谢!
最新版本的Cordova(3.3 +),较新的(1.0.0+)版本的File使用文件系统URL而不是文件路径.因此,要使接受的答案与FileSystemSuccess函数中的较新版本一起使用,请更改以下行:
var fp = rootdir.fullPath;
至:
var fp = rootdir.toURL();
另一种简单的方法是使用Cordova/Phonegap插件Canvas2ImagePlugin.安装它并将以下函数添加到您的代码中,该函数基于Raul Sanchez的getImageDataURL()(谢谢!).
function saveImageToPhone(url, success, error) { var canvas, context, imageDataUrl, imageData; var img = new Image(); img.onload = function() { canvas = document.createElement('canvas'); canvas.width = img.width; canvas.height = img.height; context = canvas.getContext('2d'); context.drawImage(img, 0, 0); try { imageDataUrl = canvas.toDataURL('image/jpeg', 1.0); imageData = imageDataUrl.replace(/data:image\/jpeg;base64,/, ''); cordova.exec( success, error, 'Canvas2ImagePlugin', 'saveImageDataToLibrary', [imageData] ); } catch(e) { error(e.message); } }; try { img.src = url; } catch(e) { error(e.message); } }
像这样使用它:
var success = function(msg){ console.info(msg); }; var error = function(err){ console.error(err); }; saveImageToPhone('myimage.jpg', success, error);
这是任何人都可以使用的文件下载代码.你只需要三个参数来使用它 -
1)URL
2)要在Sdcard中创建的文件夹名称
3)文件名(您可以为文件指定任何名称)
所有类型的文件都可以使用此代码下载.你可以使用它作为.js这IOS
也适用.
//First step check parameters mismatch and checking network connection if available call download function function DownloadFile(URL, Folder_Name, File_Name) { //Parameters mismatch check if (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 } } }
//获取写入权限和文件夹创建的第二步
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 = encodeURI(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.code); } function fileSystemFail(evt) { //Unable to access file system alert(evt.target.error.code); } }
//将文件下载到创建文件夹的第三步
function filetransfer(download_link, fp) { var fileTransfer = new FileTransfer(); // File download function with URL and local path fileTransfer.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 code" + error.code); } ); }
有用的链接
这可以使用手机间隙文件插件完成:
var url = 'http://image_url'; var filePath = 'local/path/to/your/file'; var fileTransfer = new FileTransfer(); var uri = encodeURI(url); fileTransfer.download( uri, filePath, function(entry) { console.log("download complete: " + entry.fullPath); }, function(error) { console.log("download error source " + error.source); console.log("download error target " + error.target); console.log("upload error code" + error.code); }, false, { headers: { "Authorization": "Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA==" } } );