Creating Menu in Iphone Cocos2D or Box2D?

By | April 3, 2012

Use CCMenuItemSprite and CCMenu in iPhone to create menu. call this function to set up the menu for your home page in your iPhone game or you can change this code directly to ANDROID and it will work. Make sure you have all the images mentioned in the above example. This menu will appear on the centre of… Read More »

Adding Links in Menu in Adobe AIR/ FLEX.

By | March 29, 2012

Hi all… In this tutorial I will show you how to add links in a menu in Adobe AIR/ FLEX. It is really simple. Just add a normal menu item and on the click handler for menu items match the label and navigate to the URL, that’s all. Check out this example. Change the mx:Application to mx:windowedApplication to… Read More »

Passing data between Intents or classes in ANDROID?

By | March 29, 2012

Many of our application reqiures sending data from one intent to another. This is done by putting data into one intent using putExtras() and getting it in the other intent using the getExtras() which matches the string value. However you can pass string, boolean, integer etc between intents. For passing data between intents you need atleast two intents.… Read More »

How to invoke a phone call in ANDROID?

By | March 29, 2012

The following code helps you to invoke a phone call in ANDROID without any user interaction. This code uses intent to start the activity. You know that intent can be used to start another acitivty from with in an application. Dialing a number is done using this code… and Calling number using

How to check whether an application is installed in your ANDROID Phone?

By | March 28, 2012

This sample code comes handy when you have to check that an application is already installed in your ANDROID Phone. Call the below function appInstalledOrNot() with the package name of the app installed on the ANDROID Device as a string parameter. This function returns true if the app is installed otherwise returns false.

Make your own gesture application in ANDROID or How to use gestures in ANDROID?

By | April 5, 2011

Hi all…. In this tutorial I will teach you how to make use of Gestures in ANDROID and make your own application. Follow the below steps exactly to get an idea of how to use gestures. 1. Make a gesture Library. 2. Add your own gestures into it. 3. Export it to your applications and use it. It… Read More »

How to get information about all the applications installed in your ANDROID Emulator or Phone? / How to use getPackageManager() in ANDROID ?

By | April 3, 2011

Hi all, In this tutorial I will show you how to get the information about all the applications installed in your ANDROID phone. What you have to do is create a ANDROID project inside the package pack.GetAllInstalledApplications amd name the java file “” and copy the following code into it. Here the “getPackageManager().getInstalledPackages(0);” gets information about all the… Read More »

How to make Sprite Sheets ?

By | April 2, 2011

Hi, If you are a game developer then you will always need a sequence of images to be animated & the best way to do it is via sprite sheet animations. But how can a sprite sheet be made? Suppose you have a sequence of images of any animations, how will you convert it into a sprite sheet-which… Read More »

How to sign Android project apk

By | April 1, 2011

This is a very tricky part and initially i was also ran in to strange problems . Before uploading to android market you must do the following steps. Create a Certificate Signing your application apk Finally Zip align the signed apk First the application you created should be converted to apk format. For this if you are using… Read More »

"Conversion to Dalvik format failed with error 1" Error in ANDROID / Eclipse.

By | March 30, 2011

This is a normal error when you import some project into eclipse. I will show you how to solve this First try cleaning the project from project->Clean. If this didn’t work, then try these Follow these steps 1. Go to Project » Properties » Java Build Path » Libraries and remove all except the “Android X.Y” (eg: Android… Read More »

Cocos2D Sprite Sheet Animation

By | March 29, 2011

Hi, Suppose you have a sprite sheet of the desired animation you want. But how will you use that sprite sheet animation in your program using cocos2D? That’s simple. See the following code first. Note : But how to make a sprite sheet? That topic can be found here. Making of sprite sheets from individual images are well… Read More »

Email id verification using Objective C

By | March 29, 2011

Hi, In order to verify an email address you have entered is valid or not using Objective C, use the following code. – (BOOL) checkYourMail: (NSString *) myEmail{ NSString *checkMail= @”[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+.[A-Za-z]{2,4}”; NSPredicate *matchMail = [NSPredicate predicateWithFormat:@”Matching %@”, checkMail]; return [matchMail evaluateWithObject:myEmail]; } 🙂

Using Gestures in ANDROID,A Simple example.

By | March 29, 2011

This is a really simple example illustrating gestures in ANDROID. You Know that everything you do with your hand inside the phone is a gesture like SingleTap, doubleTap etc. Here is a quick illustration of this. For this the activity must implement OnGestureListener. The GestureDetector detects the gestures. Let’s look at the example. The layout file main.xml for… Read More »

How to open browser in an ANDROID application? How to open a URL from an ANDROID application?

By | March 28, 2011

Hi all,In this tutorial I will show you how to open browser from an ANDROID application. This is done through intents. You know that intents are used to invoke other activities. So we here invoke the browser activity. The following code will open the default browser in your ANDROID phone. This is the manifest file for the above… Read More »

How to make a sprite visible and invisible in Cocos2D ?

By | March 27, 2011

Hi, In certain situations you may need to make visible or invisible certain sprites. But how to set a sprite visible and invisible in Cocos2D? See the following Cocos2D code. //Set the sprite’s visible value to 1 to make it visible yourSprite.visible = 1; //Set the sprite’s visible value to 0 to make it invisible yourSprite.visible = 0;… Read More »

How to change the Z value of a Sprite during an action in Cocos2D ?

By | March 27, 2011

Hi, There may arise some situations where you need to change the z value of a particular sprite during an action in Cocos2D. So how can you do that? See the following lines of code. CCSprite *sample= [CCSprite spriteWithFile:@”trialImage.png”]; sample.position = ccp(160,240); [self addChild:sample z:1]; /* Some of your actions goes here! */ [self reorderChild:sample z:9]; This will… Read More »

Creating a Button using Objective C

By | March 26, 2011

Hi, Sometimes you may need to create some buttons to the View using Objective C code rather than using Interface Builder. Here is how you can do that easily and efficiently. //You can create button with type. Here I am creating a Custom Button UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom]; //Then what? Give action to be performed on it!… Read More »

How to show more than one animation in sequence in Cocos2D?

By | March 25, 2011

For showing a number of animations sequentially in Cocos2D we use the CCSequence. CCSequence can accept a number of actions as parameters which will be executed in sequence , ie one after another. Here is a sample code to so this. /* This action will scale my_sprite */ id scaleTo = [CCScaleTo actionWithDuration:4 scale:1.5]; /*This action will move… Read More »