The first step to make an android application is to have a very well configured environment. To do so I have follow the amazing tutorial that TugaBest shared in AndroidPT forum. You can access it here
- Java JRE and SDK (mine is version is 1.7.0_25)
- Eclipse IDE (mine is Juno 4.2.0)
- Android SDK (mine is v22)
- Eclipse ADT Plugin
At voilá, you got yourself the perfect environment to work.