这是我的第一个问题，很抱歉，如果我写错了我的要求。我使用命令
使用Sencha Touch 2.4.1和PhoneGap（我的主要目标是Android）创建项目sencha app build native
打包。简而言之，我需要请求文件系统，然后下载一些文件（图像）。根据像this这样的帖子，我试图使用＆＃34; getFile（）＆＃34;在开始下载之前的功能，但即使是这样的简单代码也会给我带来麻烦：
Ext.define("MyApp.utils.Globals", {
singleton: true,
alias: 'widget.globals',
config: {
// Some vars not related to problem
},
constructor: function(config) {
this.initConfig(config);
},
initFileSystem: function(quota) {
if(Ext.browser.is.PhoneGap && !Ext.os.is.Desktop) {
Ext.device.FileSystem.requestFileSystem({
type: window.PERSISTENT,
size: quota,
success: this.initFsSuccess,
failure: this.initFsFailure
});
} else {
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
window.requestFileSystem(window.PERSISTENT, quota, this.initFsSuccess, this.initFsFailure);
}
},
initFsSuccess: function(fs) {
// Save file system reference
MyApp.app.fS = fs;
alert("FS: " + fs.root.fullPath); // This line outputs "FS: undefined"
fs.root.getFile("newFile.jpg", {create: true, exclusive: false}, function(fileEntry){ alert("GetFile OK"); }, function(error){ alert("GetFile ERR"); });
},
initFsFailure: function(err) {
console.log("File System Error " + err.code);
Ext.Msg.show({
title: 'FyleSystem Error',
message: 'Can\'t access to FileSystem',
buttons: [ { itemId: 'ok', text: 'Ok', ui: 'decline' } ],
fn: Ext.emptyFn
});
}
});
当我尝试访问文件系统的根完整路径时（如在＆＃34; initFsSuccess＆＃34;函数中的第一个警报中），我得到undefined作为值。此外，＆＃34; getFile＆＃34;函数停止执行（没有调用回调，成功或失败），在LogCat中我能看到这个：
01-12 12:22:20.669: D/CordovaLog(1625): file:///android_asset/www/phonegap.js: Line 1059 : processMessage failed: Error: TypeError: Cannot call method 'error' of undefined
01-12 12:22:20.669: I/Web Console(1625): processMessage failed: Error: TypeError: Cannot call method 'error' of undefined at file:///android_asset/www/phonegap.js:1059
01-12 12:22:20.669: D/CordovaLog(1625): file:///android_asset/www/phonegap.js: Line 1060 : processMessage failed: Stack: TypeError: Cannot call method 'error' of undefined
01-12 12:22:20.669: D/CordovaLog(1625): at [object Object].getFile (file:///android_asset/www/app.js:1:498661)
01-12 12:22:20.669: D/CordovaLog(1625): at [object Object].<anonymous> (file:///android_asset/www/app.js:1:617018)
01-12 12:22:20.669: D/CordovaLog(1625): at file:///android_asset/www/app.js:1:495077
01-12 12:22:20.669: D/CordovaLog(1625): at file:///android_asset/www/plugins/org.apache.cordova.file/www/requestFileSystem.js:52:25
01-12 12:22:20.669: D/CordovaLog(1625): at success (file:///android_asset/www/plugins/org.apache.cordova.file/www/fileSystems-roots.js:40:13)
01-12 12:22:20.669: D/CordovaLog(1625): at Object.callbackFromNative (file:///android_asset/www/phonegap.js:293:54)
01-12 12:22:20.669: D/CordovaLog(1625): at processMessage (file:///android_asset/www/phonegap.js:1054:21)
01-12 12:22:20.669: D/CordovaLog(1625): at Function.processMessages (file:///android_asset/www/phonegap.js:1091:13)
01-12 12:22:20.669: D/CordovaLog(1625): at pollOnce (file:///android_asset/www/phonegap.js:956:17)
01-12 12:22:20.669: D/CordovaLog(1625): at pollOnceFromOnlineEvent (file:///android_asset/www/phonegap.js:946:5)
01-12 12:22:20.669: I/Web Console(1625): processMessage failed: Stack: TypeError: Cannot call method 'error' of undefined
01-12 12:22:20.669: I/Web Console(1625): at [object Object].getFile (file:///android_asset/www/app.js:1:498661)
01-12 12:22:20.669: I/Web Console(1625): at [object Object].<anonymous> (file:///android_asset/www/app.js:1:617018)
01-12 12:22:20.669: I/Web Console(1625): at file:///android_asset/www/app.js:1:495077
01-12 12:22:20.669: I/Web Console(1625): at file:///android_asset/www/plugins/org.apache.cordova.file/www/requestFileSystem.js:52:25
01-12 12:22:20.669: I/Web Console(1625): at success (file:///android_asset/www/plugins/org.apache.cordova.file/www/fileSystems-roots.js:40:13)
01-12 12:22:20.669: I/Web Console(1625): at Object.callbackFromNative (file:///android_asset/www/phonegap.js:293:54)
01-12 12:22:20.669: I/Web Console(1625): at processMessage (file:///android_asset/www/phonegap.js:1054:21)
01-12 12:22:20.669: I/Web Console(1625): at Function.processMessages (file:///android_asset/www/phonegap.js:1091:13)
01-12 12:22:20.669: I/Web Console(1625): at pollOnce (file:///android_asset/www/phonegap.js:956:17)
01-12 12:22:20.669: I/Web Console(1625): at pollOnceFromOnlineEvent (file:///android_asset/www/phonegap.js:946:5) at file:///android_asset/www/phonegap.js:1060
01-12 12:22:20.669: D/CordovaLog(1625): file:///android_asset/www/phonegap.js: Line 1061 : processMessage failed: Message: S01 File1432781697 [{"fullPath":"\/","filesystemName":"temporary","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/Android\/data\/com.mysite.MyApp\/cache\/","filesystem":0,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"persistent","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"content","isDirectory":true,"nativeURL":"cdvfile:\/\/localhost\/content\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"files","isDirectory":true,"nativeURL":"file:\/\/\/data\/data\/com.mysite.MyApp\/files\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"files-external","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/Android\/data\/com.mysite.MyApp\/files\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"documents","isDirectory":true,"nativeURL":"file:\/\/\/data\/data\/com.mysite.MyApp\/files\/Documents\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"sdcard","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"cache","isDirectory":true,"nativeURL":"file:\/\/\/data\/data\/com.mysite.MyApp\/cache\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"cache-external","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/Android\/data\/com.mysite.MyApp\/cache\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"root","isDirectory":true,"nativeURL":"file:\/\/\/","filesystem":1,"isFile":false,"name":""}]
01-12 12:22:20.669: I/Web Console(1625): processMessage failed: Message: S01 File1432781697 [{"fullPath":"\/","filesystemName":"temporary","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/Android\/data\/com.mysite.MyApp\/cache\/","filesystem":0,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"persistent","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"content","isDirectory":true,"nativeURL":"cdvfile:\/\/localhost\/content\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"files","isDirectory":true,"nativeURL":"file:\/\/\/data\/data\/com.mysite.MyApp\/files\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"files-external","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/Android\/data\/com.mysite.MyApp\/files\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"documents","isDirectory":true,"nativeURL":"file:\/\/\/data\/data\/com.mysite.MyApp\/files\/Documents\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"sdcard","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"cache","isDirectory":true,"nativeURL":"file:\/\/\/data\/data\/com.mysite.MyApp\/cache\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"cache-external","isDirectory":true,"nativeURL":"file:\/\/\/mnt\/sdcard\/Android\/data\/com.mysite.MyApp\/cache\/","filesystem":1,"isFile":false,"name":""},{"fullPath":"\/","filesystemName":"root","isDirectory":true,"nativeURL":"file:\/\/\/","filesystem":1,"isFile":false,"name":""}] at file:///android_asset/www/phonegap.js:1061
感谢所有人提供任何帮助，如果需要，我会尝试提供任何其他信息/规格。
答案 0 :(得分：1)
找到解决方案（即使我不知道为什么......）！这就是我所做的：
1）在我的“app.js”文件中，我删除了
'Ext.device.FileSystem'
来自“要求”部分的行;
2）替换了第一篇文章中报道的“initFileSystem（）”函数的主体，用这一个
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
window.requestFileSystem(window.PERSISTENT, quota, this.initFsSuccess, this.initFsFailure);
适用于：