Phonegap FileTransfer在android中似乎什么都不做

Question

我的Phonegap FileTransfer API有问题。目前，我正试图运行下面的示例代码:

        saveFile: function (filepath,location, filetype) {
            console.log("FUNCTION BEING CALLED");
            var self = this;
            //filepath is path to the internets file
            //location is where on the device the file will be stored
            var fileTransfer = new FileTransfer();
            fileTransfer.download(filepath,self.rootPath + location + '.' + filetype,
                function (entry) {
                    console.log('############# DOWNLOAD WORKS ##############');
                    console.log("download complete: " + entry.fullPath);
                },
                function (error) {
                    console.log('############# DOWNLOAD FAILS ##############');
                    console.log("download error source " + error.source);
                    console.log("download error target " + error.target);
                    console.log("upload error code" + error.code);
                }
            )
        }

目前，似乎什么都没有发生。没有标记错误，回调函数似乎也没有触发。我得到的只是初始的console.log "FUNCTION正在被调用"。

我已经仔细检查过了，可以确认我包括cordova js文件，(cordova-2.4.0.js)。

如果它很重要，我已经在Android模拟器，HTC One X和三星Galaxy S3上尝试过，结果都是一样的。

有谁知道是什么原因引起的吗?

编辑:我还觉得我应该提一下，这些都是在Angular JS应用程序中运行的。

Answer 1

这是我在我的项目中如何做的

 document.addEventListener("deviceready", onDeviceReady, false);
 function onDeviceReady() {
     window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
  }
 function gotFS(fileSystem) {
    window.fileSystem = fileSystem;
    //create directory test_app
    fileSystem.root.getDirectory("test_app", {
        create : true,
        exclusive : false
    }, dirWallpaper, fail);
 function fail(evt) {
 }
function dirWallpaper(entry) {
    //save the directory path
    window.testDir = entry;
}
//now download file to that location
saveFile: function (filepath,location, filetype) {
        console.log("FUNCTION BEING CALLED");
        var self = this;
        //filepath is path to the internets file
        //location is where on the device the file will be stored
        var fileTransfer = new FileTransfer();
        var path = window.testDir.fullPath + "/test_pdf."+ filetype;
        fileTransfer.download(filepath,path,
            function (entry) {
                console.log('############# DOWNLOAD WORKS ##############');
                console.log("download complete: " + entry.fullPath);
            },
            function (error) {
                console.log('############# DOWNLOAD FAILS ##############');
                console.log("download error source " + error.source);
                console.log("download error target " + error.target);
                console.log("upload error code" + error.code);
            }
        )
    }