Develop Reference

How to write file in root level directory rather than app data directory in Cordova android app?

I am building a Cordova android application and use cordova-plugin-file to write file on local system. The code I am using is as below:
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function (fs) {
console.log('file system open: ' + fs.name);
fs.root.getFile("newPersistentFile.txt", { create: true, exclusive: false }, function (fileEntry) {
console.log("fileEntry is file?" + fileEntry.isFile.toString());
writeFile(fileEntry, null);
}, onErrorCreateFile);
}, onErrorLoadFs);
The file newPersistentFile.txt will be created inside app data directory. How can I write file into system root level directory such as /Downloads, Notifications, etc.?

You want to look at the cordova.file directories (see docs).
So for downloads:
window.requestFileSystem(cordova.file.externalRootDirectory + "Downloads", 0, function(fs) {
console.log('file system open: ' + fs.name);
...
}

Can't access root folder on android emulator with cordova

I'm trying crawl the sdcard of the phone using cordova 3.4. Currently I'am trying this on an android emulator.
I am able to acces the sdcard but the root folder is my application folder.
How can I access the root folder of the sdcard (/storage/sdcard) ?
Here is the code I'am using :
function getFileSystem(){
var deferred = $q.defer();
if(window.requestFileSystem){
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,
function(fileSystem){
root = fileSystem.root;
console.log("Root file system : "+root.fullPath); // here I'm getting '/'
listFiles(root).then(function(files){
deferred.resolve(files);
}, function(error){
deferred.reject(error);
});
}, function(evt){ // error get file system
console.log("File System Error: "+evt.target.error.code);
}
);
}
return deferred.promise;
}
I have tried root.getParent() but it return undefined
Any idea ?

How to create a protected directory with Phonegap

I am developing a mobile application using Phonegap (Apache Cordova) ver. 3.3.0 for both Android platform and iOS.
This application should be able to create a directory in the mobile device, and access to this to save some files that I have downloaded from external urls.
The application, now, creates correctly the dir, and can access to it to save files.
The problem is that I want to make it a "protected" directory: the directort should be opened only pressing a button in my app, but inaccessible from anywhere else.
How can I realize this?
This is my code, for the creation of the directory.
document.addEventListener("deviceready", onDeviceReady, false);
// PhoneGap is ready
//
function onDeviceReady() {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFileSystemSuccess, fail);
}
function onFileSystemSuccess(fileSystem) {
console.log(fileSystem.name);
console.log(fileSystem.root.name);
var directoryEntry = fileSystem.root;
directoryEntry.getDirectory("myDir", {create: true, exclusive: false}, onDirectorySuccess, onDirectoryFail);
}
function onDirectorySuccess(parent) {
console.log(parent);
//parent.fullPath = path to dir in smartphone
window.localStorage.setItem("directory_path",parent.fullPath);
}
function onDirectoryFail(error) {
alert("Unable to create new directory: " + error.code);
}
function fail(evt) {
console.log(evt.target.error.code);
}

Your idea is impossible in cordova or any other language!
If you wish to accomplish something like that- use sqlite to create folder structure ant save data files there.

Write a file in phoneGap

I want to create file using the PhoneGap API File Writer, but using data my file will create in root folder either memory card or phone memory, but actually I want to create that file. Where does my installed app go? How do I know that where my files are installed and how do I create a file at that location?
Here is what I have:
function onDeviceReady() {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
}
function gotFS(fileSystem) {
fileSystem.root.getFile("readme.txt", {create: true, exclusive: false}, gotFileEntry, fail);
}

See this last comment. So you can try to get /data/yourApp folder via fileSystem.root.getDirectory() etc. if it exists - so you are on sd card. go to the /data/yourApp and write there. If it doesn't exists - the root is already you app folder - just write the file.

PhoneGap open file in native app. Build via build.phonegap.com

At first:
YES, there are many solutions in StackOverflow, but non of them works in my case.
I got application built in SmartGWT.mobile
I attached config files and all needed files to this build to prepare it for PhoneGap
Application is build via build.phonegap.com site.
It works perfectly fine on Android 4.1.1
I want to:
Download file to local filesystem it is an PDF file - It is working fine using:
var fileTransfer = new FileTransfer();
fileTransfer.download(.....
Open PDF in native app (for eg. Adobe Reader) whichever is installed on android for PDFs - it is not working:
I tried:
(1)
cordova.exec("ChildBrowserCommand.showWebPage", encodeURI(theFile.toURL()) );
(2)
window.plugins.childBrowser.showWebPage(encodeURI(theFile.toURL()));
(3)
window.open(encodeURI(theFile.toURL()), '_blank', 'location=yes');
(4)
even HTML5 plugin for open PDFs by firefox
All variations with "file://" without with "./" at front and so on.
childBrowser shows only white screen, each time adds "http://" at front, window.open - the same.
I finally found something interesting like WebIntent, so i did:
window.plugins.webintent.startActivity({
action: window.plugins.webintent.ACTION_VIEW,
type: "application/pdf",
url: encodeURI(theFile.toURL().substring(7))},
function() {},
function() {alert('Failed to open URL via Android Intent')}
);
but its not working due to fact that phonegap-build not attaching class file and It can not find WebIntent Class
I declare this plugin using in config.xml:
<gap:plugin name="com.borismus.webintent.WebIntent" />
Do you know why it is not working, or what I'm doing worng ?
Maybe you know other way to open file just like that in native app, it suppose to be simple
I just want my app to download and show (in native app) the PDF for user.

don's FileOpener version have worked on my app cordova 3.0
phonegap local plugin add https://github.com/don/FileOpener
all the xmls, plugin, etc are then added automatically.
added fileopener.js on index.html
and then
window.plugins.fileOpener.open( path );

$("#page").on('pageshow', function(event, ui) {
if(event.handled !== true)
{
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
event.handled = true;
}
return false;
});
function fail() {
console.log("failed to get filesystem");
}
function gotFS(fileSystem) {
console.log("got filesystem");
// save the file system for later access
console.log(fileSystem.root.fullPath);
window.rootFS = fileSystem.root;
downloadImage(url, fileName);
}
function downloadImage(url, fileName){
var ft = new FileTransfer();
ft.download(
url,
window.rootFS.fullPath + "/" + fileName,
function(entry) {
console.log("download complete: " + entry.fullPath);
},
function(error) {
console.log("download error" + error.code);
}
);
}