Moodle 2.4

Our group is developing a android application named as Student Infromation Viewer and we retrieve data mostly from the moodle. At the start of the project we used moodle 1.9 version and now as our lecturer in charge requested we changed it two moodle 2.4 which is the version currently using at our university.

The problems to overcome were

• We developed our own web service to retrieve data from moodle 1.9 but those services cannot be used because moodle 2.4 file stucture is totally different.
• The moodle 2.4 is developed in php 5.3 so it cannot be hosted at a free server. So we were unable to host our own moodle server for data retrieval

The solutions were to

• Host the moodle 2.4 server in a paid domain
• Re change the directory access paths in the web service.

Note- The moodle 2.4 has directory access in two levels. The hash code first 2 codes represent the root file, the second hash codes represent the secondary file level and the content will be stored with in this file.

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Introduction to JQuery Mobile

Introduction

jQuery Mobile is a user interface framework based on jQuery that works across all popular phones, tablet, e-reader, and desktop platforms. Built with accessibility and universal access in mind, we follow progressive enhancement and responsive web design (RWD) principles. HTML5 Markup-driven configuration makes it easy to learn, but a powerful API makes it easy to deeply customize the library.

Pages & Dialogs

A page in jQuery Mobile consists of an element with a data-role="page" attribute. Within the "page" container, any valid HTML markup can be used, but for typical pages in jQuery Mobile, the immediate children of a "page" are divs with data-roles of "header", "content", and "footer". The baseline requirement for a page is only the page wrapper to support the navigation system, the rest is optional.

A page can be styled as a dialog that makes the page look like it's a modal style overlay. To give a standard page the appearance of a modal dialog, add the data-rel="dialog" attribute to the link. Transitions can also be set on dialog links.

AJAX Navigation & Transitions

jQuery Mobile includes an AJAX navigation system to support a rich set of animated page transitions by automatically 'hijacking' standard links and form submissions and turning them into an AJAX request. The back button is fully supported and there are features to prefetch & cache, dynamically inject, and script pages for advanced use cases.

Whenever a link is clicked or a form is submitted, that event is automatically intercepted by the AJAX nav system and is used to issue an AJAX request based on the href or form action instead of reloading the page. While the framework waits for the AJAX response, a loader overlay is displayed.

When the requested page loads, jQuery Mobile parses the document for an element with the data-role="page"attribute and inserts that code into the DOM of the original page. Next, any widgets in the incoming page are enhanced to apply all the styles and behavior. The rest of the incoming page is discarded so any scripts, stylesheets or other information will not be included. The framework will also note the title of the incoming page to update the title when the new page is transitioned into view.

Now that the requested page is in the DOM and enhanced, it is animated into view with a transition. By default, the framework applies a fade transition. To set a custom transition effect, add the data-transition attribute to the link.

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How to Download an image in android

The following code shows how to download a image from a particular URL.

The download class is shown below

//Download Class

package com.sliit.siv;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

import org.apache.http.util.ByteArrayBuffer;

import android.os.Environment;
import android.util.Log;

public class DownloadClass {

private static final String TAG = "FileManager";
private final static String PATH = Environment.getExternalStorageDirectory().getPath();

private static String Path= "";
private static String Name= "";
private static String Directory= "";

public static void DownloadResources(String tempPath,String tempName, String tempDirectory)
{
Path=tempPath;
Name=tempName;
Directory=tempDirectory;

startDownloadingThread();
}

public static void startDownloadingThread()
{
Thread thread = new Thread()
{
@Override
public void run()
{
synchronized (this)
    {    

try
{
DownloadFromUrl(Path,Name,Directory);
}

catch (Exception e)
{
Log.d(TAG, "FK YY: " + e);
}
finally
{
   
}
    }
}
};

thread.start();
}

public static File DownloadFromUrl(String fileURL, String fileName, String courseDirectoryAndType)   //this is the downloader method
{
File file = null;
try
{
URL url = new URL(fileURL); //you can write here any link

boolean mExternalStorageAvailable = false;
        boolean mExternalStorageWriteable = false;
        String state = Environment.getExternalStorageState();

        if (Environment.MEDIA_MOUNTED.equals(state))
        {
           // We can read and write the file
           mExternalStorageAvailable = mExternalStorageWriteable = true;
        }
        else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state))
        {
           // We can only read the file
           mExternalStorageAvailable = true;
           mExternalStorageWriteable = false;
        }
        else
        {
           //It may be one of many other states

           mExternalStorageAvailable = mExternalStorageWriteable = false;
        }        
        if (mExternalStorageAvailable || mExternalStorageWriteable)
        {
File fileDirectory = new File(PATH + "/Moodle/" + courseDirectoryAndType); // create a File object for the parent directory

fileDirectory.mkdirs(); // if directory is not exist, create it.

file = new File(fileDirectory, fileName); // create a File object for the output file

URLConnection ucon = url.openConnection(); // Open a connection to that URL.

InputStream is = ucon.getInputStream(); // Define InputStreams to read from the URLConnection.
BufferedInputStream bis = new BufferedInputStream(is);

ByteArrayBuffer baf = new ByteArrayBuffer(50);  //Read bytes to the Buffer until there is nothing more to read(-1).
int current = 0;

while ((current = bis.read()) != -1)
{
baf.append((byte) current);
}

FileOutputStream fos = new FileOutputStream(file); //convert byte to file(.doc,.ppt or .pdf)
fos.write(baf.toByteArray());
fos.close();
        }

} catch (IOException e)
{
Log.d(TAG, "Error: " + e);
}
finally
{

}

return file;
}

public boolean checkFileAvailability(String localPath)
{
boolean status=false;

     File sdcard = Environment.getExternalStorageDirectory(); //get the SDcard path
     File file = new File(sdcard,localPath); //set original file path
   
     if(file.exists())
     {
     status = true;     //if file exist set status 'true'
     }
       
     else
     {
     //status = false;
     }
   
     return status;
}


///oookkk------------------------------------------------------------------------------------------------


public static StringBuilder inputStreamToString(InputStream is)
{
//System.out.println("OK 1");
    String rLine = "";
    StringBuilder answer = new StringBuilder();
    BufferedReader rd = new BufferedReader(new InputStreamReader(is));
   
    try {
     while ((rLine = rd.readLine()) != null) {
      answer.append(rLine);
       }
    }
   
    catch (IOException e) {
        e.printStackTrace();
     }
    //System.out.println("OK 2");
    return answer;
}


//Noifications UI

}

The following is the XML file

//Download.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <LinearLayout

        android:id="@+id/linearLayout1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" >

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:onClick="downloadPicture"

            android:text="Click to start download" >

        </Button>

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:onClick="resetPicture"

            android:text="Reset Picture" >

        </Button>

    </LinearLayout>

    <ImageView

        android:id="@+id/imageView2"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:src="@drawable/ic_launcher" >

    </ImageView>

</LinearLayout> 

The following changes are needed to do to Manifest.xml

//Manifest.xml

    <uses-permission android:name="android.permission.INTERNET" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /

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