This App is the first of many that will be developed.
Adept to use books in my learning, this App was the basis for my knowledge.
Learn how it was made in the Novatec Publisher of the author Luiz Carlos Querino Son site: Developing Your First Application Android!
9Apps 4.9
![Hide Android Calls & Messages in a Calculator App [How-To] screenshot 3](https://i.ytimg.com/vi/H4K1_8z3Gis/mqdefault.jpg)
![Hide Apps on Android Within a Seemingly Innocent Calculator [How-To] screenshot 4](https://i.ytimg.com/vi/22w2xnV35Ok/mqdefault.jpg)
