J2ME | read BlackBerry device name, device id (under MIDP)

Hello to all.

I searched the web and not found any implemantaion of reading device name or device id using J2ME MIDP for blackberry.

There exists an RIM api: "net.rim.device.api.system.DeviceInfo.getDeviceName()" which allow you to read the blackberry device information, but on when creating a global application for all MIDP devices, this api will not work for other devices like Sony-Ericsson, NOKIA, Samsung, Motorola, HTC and so...

The solution is to dynamicly load an outer JAR (dynamic library = dll) only when a blackberry device detected and read all data.
NOTE: if we will access to this library (JAR) without validating the RIM device, an excaption will be thrown!!

So, the solution is:
Step 1:

Create a new project: Mobile Class Library.
Name it: BlackberryInfo

Step 2:

create new Class named: DeviceInfo
with the following code:

Code for step 2:

package BlackberryInfo;

public class DeviceInfo
{
   static public String getDeviceName()
   {
      return net.rim.device.api.system.DeviceInfo.getDeviceName();
   }

   static public String getManufacturerName()
   {
      return net.rim.device.api.system.DeviceInfo.getManufacturerName();
   }

   static public int getDeviceId()
   {
      return net.rim.device.api.system.DeviceInfo.getDeviceId();
   }

   static public String getPlatformVersion()
   {
      return net.rim.device.api.system.DeviceInfo.getPlatformVersion();
   }
}

Step 3:

Build project and get JAR and JAD named: BlackberryInfo.jar
Note: build this JAR using Blackberry BlackBerry JDE (I used 5.0.0) (BlackBerry JDE downloads)
if you want, i can upload this library to the blog...

Step 4:

In your application (J2ME MIDP), just add BlackberryInfo.jar as library.

Step 5:

Now, all you have to do, is just to validate that this is RIM Blackberry device, and the read all device info.

Code for step 5:

static public boolean isBlackberryPlatform()
{
    try
    {
        Class.forName("net.rim.blackberry.api.browser.Browser");
        return true;
    }
    catch (Exception ex)
    {
        return false;
    }
}

// some func for read device information (device name, device id, device
 if (isBlackberryPlatform() == true)
{
            System.out.println("Blackberry platform:");
            System.out.println(BlackberryInfo.DeviceInfo.getDeviceName());
            System.out.println(BlackberryInfo.DeviceInfo.getManufacturerName());
            System.out.println(BlackberryInfo.DeviceInfo.getPlatformVersion());
            System.out.println(BlackberryInfo.DeviceInfo.getDeviceId() + "");
}

Notice that, the JAR is loaded only when trying to access it, so other devices expect RIM blackberry will NOT get to this line so they won't try to load unavailable api of rim blackberry.

reference to DeviceInfo implemantation (5.0.0)
http://www.blackberry.com/developers/docs/5.0.0api/net/rim/device/api/system/DeviceInfo.html

hope i could help someone outthere...
p.s.
this method can work for every OUTER/UNKNOWN API in J2ME.

J2ME | determine BlackBerry device (OS)

Here is a code for determine whether a J2ME application is running over Blackberry device.

The idea is to check for a class that exists only in Blackberry platform and not on J2ME MIDP Operation system.
here I choose to determine using "net.rim.blackberry.api.browser.Browser" which exists only in Blackberry OS (NOT in other OSs).

The code using Class.forClass method (link) which returns the Class object associated with the class or interface with the given string name. if the class exists (so we in Blackberry) the method return an object, otherwise throws an exception.

here is a simple code:

static public boolean isBlackberryPlatform()
{
        try
        {
            Class.forName("net.rim.blackberry.api.browser.Browser");
            return true;
        }
        catch (Exception ex)
        {
            return false;
        }
}

enjoy, and post replies...

Asp.Net - check/validate cookies support

Here is a code for checking/validating that user device (browser) supports cookies. in other words this code checks if cookies are enabled on the browser.

Here the code implemented in the Login page:

    // Constants:
    protected const string QUERYSTRING_CHECK_COOKIE = "checkcookie";
    protected const string TEST_COOKIE_NAME = "check_cookie";
    protected const string TEST_COOKIE_VALUE = "ok";

    // On-load event, at page load:
    protected override void OnLoad(EventArgs p_eventArgs)
    {
        if (IsPostBack == false)
        {
            // Check if browser support cookies
            if (Request[QUERYSTRING_CHECK_COOKIE] == null)
            {
                // try to insert cookie:
                Response.Cookies.Add(new HttpCookie(TEST_COOKIE_NAME, TEST_COOKIE_VALUE));
                string newUrl = string.Format("Login.aspx?{1}=1", QUERYSTRING_CHECK_COOKIE);
                this.Redirect(newUrl, true);
                return;
            }
            else
            {
                // here, client sould contain test cookie:
                HttpCookie cookie = Request.Cookies[TEST_COOKIE_NAME];
                bool isCookieEnabled = cookie != null && cookie.Value == TEST_COOKIE_VALUE;
                if (isCookieEnabled == false)
                {
                    // cookies are disabled!!! show error message
                    Label1.Text = "Device NOT support Cookies!";
                    return;
                }
            }

        }
    }

You can implement this also in other pages than Login page.
:)

J2ME | Binary search algorithem

Binary search algorithem method/function for j2me platform.
Use is with sorted String array!!!
Enjoy... this works great with my example on J2ME | String array sort. link here.

public static int binarySearch(String[] p_arraySorted, String p_key)
{
return binarySearch(p_arraySorted, 0, p_arraySorted.length, p_key);
}

public static int binarySearch(String[] p_arraySorted, int p_first, int p_upto, String p_key)
{
int compare, mid;
while (p_first < p_upto)
{
// Compute mid point.
mid = (p_first + p_upto) / 2;

compare = p_key.compareTo(p_arraySorted[mid]);
if (compare < 0) // p_key < p_arraySorted[mid]
{
// repeat search in bottom half
p_upto = mid;
}
else if (compare > 0) // p_key > p_arraySorted[mid]
{
// Repeat search in top half
p_first = mid + 1;
}
else
{
// Found it. return position
return mid;
}
}

// Failed to find key
return -1;
}

Sort it and search it wisely...

J2ME | String array sort

Here is a good function for sorting string arrays.
The algorithem is BUBBLE-SORT algorithm.
The algorithem sorts the string array (dictionary comparison)

static void bubbleSort(String[] p_array) throws Exception
{
boolean anyCellSorted;
int length = p_array.length;
String tmp;
for (int i = length; --i >= 0;)
{
anyCellSorted = false;
for (int j = 0; j < i; j++)
{
if (p_array[j].compareTo(p_array[j + 1]) > 0)
{
tmp = p_array[j];
p_array[j] = p_array[j + 1];
p_array[j + 1] = tmp;
anyCellSorted = true;
}

}
if (anyCellSorted == false)
{
return;
}
}
}

if you want i will upload more SORT algorithems...