Add Text-File to IntelXDK-Application

[Konrad_H_]

Hi,

I am working on an Application with IntelXDK that needs to be able to remember some data. It's really simple data (name of an object + its adress) so I wanted to store it inside a text-file.

I've been having a few problems with that though.

Is there a possibility to just create a memory.txt file inside my application's www-directory (where there are already Dictionaries like Images/Galleria/etc. and then have access to it inside the programm?

I've been trying to use the cordova-file plugin to access the file, but I don't know which location I have to use for it?

This is what I'm doing right now: (error: file not found)

document.addEventListener('deviceready', onDeviceReady, false);  
function onDeviceReady() {  
    function readFromFile(fileName, cb) {
        var pathToFile = cordova.file.dataDirectory + fileName;
        console.log(pathToFile);
        window.resolveLocalFileSystemURL(pathToFile, function (fileEntry) {
            fileEntry.file(function (file) {
                var reader = new FileReader();

                reader.onloadend = function (e) {
                    cb(JSON.parse(this.result));
                };

                reader.readAsText(file);
            }, errorHandler.bind(null, fileName));
        }, errorHandler.bind(null, fileName));
    }

    var fileData;
    readFromFile('printer_setup.txt', function (data) {
        fileData = data;
    });
}

Help would be very much appreciated :) ,

Konrad

[Diego_Calp]

Hi Konrad,

Take a look at this blog post, it discuss some alternatives to store data in hybrid apps.

http://gonehybrid.com/dont-assume-localstorage-will-always-work-in-your-hybrid-app/

Besides its title, I think it may have useful information for you.

Regards

Diego

[Konrad_H_]

Hey Diego!

Thank you for your response.

Your solution works for me on the Intel XDK-Simulation and if I debug the HTML-File inside Google Chrome. It also seems really simple and elegant, I like it very much.

Sadly it doesn't work when I debug the Application on my nexus 9 device (doesn't show any error on the Console though..). Do you have any idea why? The App has permission to use the file-system.

I want to create a hybrid application for mobile devices.

Konrad

[Diego_Calp]

Hi Konrad,

localStorage is not working on device? You mean using Debug connecting your phone to XDK or installing an APK?

Regards,

Diego

[Konrad_H_]

I tried it while debugging in Intel XDK when connected to the Nexus.

Is there a difference to installing the APK and then running the application?

Regards, 

Konrad

[Diego_Calp · Accepted solution]

I don't know if there is a difference, but using localStorage works for me in real apps deployed to Android and iOS devices.

For example I use it to give the user the option to remember its login:

Save data

localStorage.setItem('leche_userid',usuarioid);
localStorage.setItem('leche_pass',$("#i_password").val());

Recover data

$("#i_email").val(localStorage.getItem('leche_userid'));
$("#i_password").val(localStorage.getItem('leche_pass'));

I think you may be confident it will work. I'm not sure, but I'm remembering that the device debug clears caches and storages when it runs. 

Regards,

Diego