Hi, Streams after 12th to enroll in are:

• Bachelor of Engineering (B.E or B. Tech)- Information Technology (IT)
• BCA
• BSC IT

You can also enroll for a degree in computer science, software engineering, or another programming related field and specialize in mobile application coding.

Very importantly, as a mobile app developer, you will be working in at least one of the five major platforms  Android, iOS, Windows, Symbian, or RIM (Blackberry). While you can and should be able to code in all these platforms, you will have to choose one to specialize in when you are just starting out.
BUT this is for later stage.
Hope this helps.
Good Luck.

Hi, Mobile application development process is the set of procedures involved in programming and building software or applications for fast operating handheld devices like smart phones and tablets. 

Also talking about the qualification, you need to do science degree. The major platforms are Android, Apple, Windows, Symbian, and RIM (Blackberry). You can learn to code for all of these platforms, but you probably need to choose one when you're first staring out.

This should help you. Let me know incase you seek any other information.

All the best!

You need to be proficient in a programming language such as C, C++, Objective C for writing applications on Ios (iPhone, iPad) or Java (Android, Blackberry OS). You should understand the basics of UI design and also the basics of application design, development and testing. Once you have the basics then you have to choose what platform and mobile operating system you want to specialize on and focus on it.
To become a Google Android developer you have to be proficient in Java and learn Android development. Android development can be done on Mac OS-X, Windows or Linux environment.
Along with computer science degree check above what are the other requirements.

Good Luck.