Cordova文件插件

Question

我试图让Cordova文件插件和Cordova文件传输工作，我的代码（下面）应该创建一个新文件夹＆＃39; Makes＆＃39;并将图像下载到该新文件夹中，但它只是抛出错误代码1，但我无法弄清楚原因，有人可以指出我正确的方向：

function onAppReady(){
    if(navigator.splashscreen && navigator.splashscreen.hide){
        navigator.splashscreen.hide();
    }

    updateImages();
}


function updateImages(){
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, fileSystemSuccess, fileSystemFail);

    function fileSystemSuccess(fileSystem){
        var directoryEntry=fileSystem.root;
        directoryEntry.getDirectory("Makes", {create:true, exclusive:false}, onDirectorySuccess, onDirectoryFail);

    }
    function onDirectorySuccess(parent){
        var rootdir = fileSystem.root;
        var fp = parent.toURL(); 

        var download_link=encodeURI('https://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/1122px-Wikipedia-logo-v2.svg.png');
        var fpFull=fp+'Makes/Wikipedia.png';

        filetransfer(download_link, fpFull);
    }
    function onDirectoryFail(error){alert("Unable to create new directory: "+error.code);}
    function fileSystemFail(evt){alert(evt.target.error.code);}
}

function filetransfer(download_link, fp){
    var fileTransfer=new FileTransfer();
    fileTransfer.download(download_link, fp, function(entry){
        console.log("download complete: "+entry.fullPath);
    },
    function(error){
        console.log("download error: "+error.code+' - '+error.source+' - '+error.target);
    });
}

document.addEventListener("app.Ready", onAppReady, false);