How To Start

You have to Strong On Java concepts
Html5 And Xml Also.

After that Go To following Site and
Download Android Sdk

Operating Systems Requirements

• Windows XP (32-bit), Vista (32- or 64-bit), or Windows 7 (32- or 64-bit)
• Mac OS X 10.5.8 or later (x86 only)
• Linux (tested on Ubuntu Linux, Lucid Lynx)
  • GNU C Library (glibc) 2.7 or later is required.
  • On Ubuntu Linux, version 8.04 or later is required.
  • 64-bit distributions must be capable of running 32-bit applications.

Eclipse IDE

• Eclipse 3.6.2 (Helios) or greater
  Note: Eclipse 3.5 (Galileo) is no longer supported with the latest version of ADT.
• Eclipse JDT plugin (included in most Eclipse IDE packages)
• JDK 6 (JRE alone is not sufficient)
• Android Development Tools plugin (recommended)
• Not compatible with GNU Compiler for Java (gcj)

Other development environments

• JDK 6 (JRE alone is not sufficient)
• Apache Ant 1.8 or later
• Not compatible with Gnu Compiler for Java (gcj)

Note: Some Linux distributions may include JDK 1.4 or Gnu Compiler for Java, both of which are notsupported for Android development.

Its 100% free....

Develop Android Apps And Enjoy..

How To Put Apps on Google play  ...or Android Apps Store..

First of all your Apps is Correct As according Android Testing And After That you have to be 

GOOGLE MEMBER to Post the apps.

 How ??

Just Go

http://developer.android.com/distribute/googleplay/publish/register.html

Register for a publisher account

The first step is to visit the Google Play Android Developer Console and register for a publisher account.

Here's what you will do during registration:

Tips

• You need a Google account to register. You can create one during the process.
• If you are an organization, consider registering a new Google account rather than using a personal account.
• Review the developer countries andmerchant countries where you can distribute and sell apps.

1. Visit the Google Play Android Developer Console athttps://play.google.com/apps/publish/.
2. Enter basic information about your developer identity — developer name, email address, and so on. You can modify this information later.
3. Read and accept the Developer Distribution Agreement that applies to your country or region. Note that apps and store listings that you publish on Google Play must comply with the Developer Program Policies and US export law,
4. Pay a $25 USD registration fee using Google Checkout. If you don't have a Google Checkout account, you can quickly set one up during the process.

When your registration is verified, you’ll be notified at the email address you specified during registration.