LocalFileSystem is not defined PhoneGap - extjs

Question

I know that the question has been asked before but I can't find any workaround...
I am trying to get a file thanks to PhoneGap File feature, so I took the example on their documentation website, and get the above error.
This is my code :
document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
}
function gotFS(fileSystem) {
fileSystem.root.getFile("toto.txt", null, gotFileEntry, fail);
}
function gotFileEntry(fileEntry) {
fileEntry.file(gotFile, fail);
}
function gotFile(file){
readDataUrl(file);
readAsText(file);
}
function readDataUrl(file) {
var reader = new FileReader();
reader.onloadend = function(evt) {
console.log("Read as data URL");
console.log(evt.target.result);
};
reader.readAsDataURL(file);
}
function readAsText(file) {
var reader = new FileReader();
reader.onloadend = function(evt) {
console.log("Read as text");
console.log(evt.target.result);
};
Ext.Msg.alert('toto',reader.readAsText(file), Ext.emptyFn);
}
function fail(error) {
Ext.Msg.alert('error',error.code, Ext.emptyFn);
}
Here is my config.xml file :
<feature name="http://api.phonegap.com/1.0/device" />
<preference name="permissions" value="none" />
<preference name="orientation" value="default" />
<preference name="target-device" value="universal" />
<preference name="fullscreen" value="true" />
<preference name="webviewbounce" value="true" />
<preference name="prerendered-icon" value="true" />
<preference name="stay-in-webview" value="false" />
<preference name="ios-statusbarstyle" value="black-opaque" />
<preference name="detect-data-types" value="true" />
<preference name="exit-on-suspend" value="false" />
<preference name="show-splash-screen-spinner" value="true" />
<preference name="auto-hide-splash-screen" value="true" />
<preference name="disable-cursor" value="false" />
<preference name="android-minSdkVersion" value="7" />
<preference name="android-installLocation" value="auto" />
<feature name="File">
<param name="android-package" value="org.apache.cordova.file" />
</feature>
<icon src="icon.png" />
<icon gap:density="ldpi" gap:platform="android" src="res/icon/android/icon-36-ldpi.png" />
<icon gap:density="mdpi" gap:platform="android" src="res/icon/android/icon-48-mdpi.png" />
<icon gap:density="hdpi" gap:platform="android" src="res/icon/android/icon-72-hdpi.png" />
<icon gap:density="xhdpi" gap:platform="android" src="res/icon/android/icon-96-xhdpi.png" />
<icon gap:platform="blackberry" src="res/icon/blackberry/icon-80.png" />
<icon gap:platform="blackberry" gap:state="hover" src="res/icon/blackberry/icon-80.png" />
<icon gap:platform="ios" height="57" src="res/icon/ios/icon-57.png" width="57" />
<icon gap:platform="ios" height="72" src="res/icon/ios/icon-72.png" width="72" />
<icon gap:platform="ios" height="114" src="res/icon/ios/icon-57-2x.png" width="114" />
<icon gap:platform="ios" height="144" src="res/icon/ios/icon-72-2x.png" width="144" />
<icon gap:platform="webos" src="res/icon/webos/icon-64.png" />
<icon gap:platform="winphone" src="res/icon/windows-phone/icon-48.png" />
<icon gap:platform="winphone" gap:role="background" src="res/icon/windows-phone/icon-173.png" />
<gap:splash gap:density="ldpi" gap:platform="android" src="res/screen/android/screen-ldpi-portrait.png" />
<gap:splash gap:density="mdpi" gap:platform="android" src="res/screen/android/screen-mdpi-portrait.png" />
<gap:splash gap:density="hdpi" gap:platform="android" src="res/screen/android/screen-hdpi-portrait.png" />
<gap:splash gap:density="xhdpi" gap:platform="android" src="res/screen/android/screen-xhdpi-portrait.png" />
<gap:splash gap:platform="blackberry" src="res/screen/blackberry/screen-225.png" />
<gap:splash gap:platform="ios" height="480" src="res/screen/ios/screen-iphone-portrait.png" width="320" />
<gap:splash gap:platform="ios" height="960" src="res/screen/ios/screen-iphone-portrait-2x.png" width="640" />
<gap:splash gap:platform="ios" height="1024" src="res/screen/ios/screen-ipad-portrait.png" width="768" />
<gap:splash gap:platform="ios" height="768" src="res/screen/ios/screen-ipad-landscape.png" width="1024" />
<gap:splash gap:platform="winphone" src="res/screen/windows-phone/screen-portrait.jpg" />
<access origin="http://127.0.0.1*" />
I tried installing the cordova file plugin with the phonegap CLI, which actually succeeded... but any change appearing on my app.
Any idea ?
Thanks a lot!!
ps: I'm using Sencha Touch 2.3.1 with Sencha Cmd to build my app but it probably doesn't change anything since other features like batterystatus or physical button binding work fine...

Answer 1

include following in your Config.xml
<feature name="http://api.phonegap.com/1.0/file" />
<feature name="File">
<param name="android-package" value="org.apache.cordova.file.FileUtils" />
</feature>
<feature name="FileTransfer">
<param name="android-package" value="org.apache.cordova.filetransfer.FileTransfer" />
</feature>
<feature name="Storage">
<param value="org.apache.cordova.Storage" name="android-package"/>
</feature>