PhoneGap文件读写:PhoneGap读写文件html代码在android设备上不起作用

PhoneGap文件读写:PhoneGap读写文件html代码在android设备上不起作用,android,cordova,xui,Android,Cordova,Xui,我用xui尝试了一些phonegap appalong的烹饪书样本,以便将文件读写到本地存储SD卡,phonegap在其文件io中非常流行,但当我在设备上尝试时,它什么也没做。我想有人遇到过同样的事情 代码如下所示: <!DOCTYPE html> <html> <head> <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=

我用xui尝试了一些phonegap appalong的烹饪书样本,以便将文件读写到本地存储SD卡,phonegap在其文件io中非常流行,但当我在设备上尝试时,它什么也没做。我想有人遇到过同样的事情

代码如下所示:

    <!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width;" />
    <title>File Download</title>
    <script type="text/javascript" src="xui.js"></script>
    <script type="text/javascript" src="cordova-2.0.0.js"></script>
    <script type="text/javascript" >

    var downloadDirectory;

    document.addEventListener("deviceready", onDeviceReady, true);

    function onDeviceReady() {
        window.requestFileSystem(
            LocalFileSystem.PERSISTENT, 
            0, 
            onFileSystemSuccess, 
            null
        );

        x$('#download_btn').on( 'click', function(e) {
            download();
        });
    }

    function onFileSystemSuccess(fileSystem) {
        fileSystem.root.getDirectory('my_downloads',{create:true},
            function(dir) {
                downloadDirectory = dir;
            },fail);
    }

    function fail(error) {
        x$('#message').html('We encountered a problem: ' + error.code);
    }

    function download() {
        var fileURL = document.getElementById('file_url').value;
        var localFileName = getFilename(fileURL);

        x$('#message').html('Downloading ' + localFileName);

        var fileTransfer = new FileTransfer();
        fileTransfer.download(fileURL, downloadDirectory.fullPath + '/' + localFileName, 
            function(entry){
                x$('#message').html('Download complete. File saved to: ' + entry.fullPath);
            }, 
            function(error){
                alert("Download error source " + error.source);
            }
        );
    }

    // Obtain the filename
    function getFilename(url) {
       if (url) {
          var m = url.toString().match(/.*\/(.+?)\./);
          if (m && m.length > 1) {
             return m[1] + '.' + url.split('.').pop();
          }
       }
       return "";
    }
    </script>
</head>
<body>

    <input type="text"      id="file_url"       value="http://blogs.adobe.com/adobeingovernment/files/2012/07/phonegap.jpg" />
    <input type="button"    id="download_btn"   value="Download" />

    <div id="message"></div>

</body>
</html>
我已经查看了android清单文件,它拥有所有权限,包括写入外部存储。请告知。

请参阅-