Android app - for thanhnx54 only

-----THIS PROJECT IS VERY URGENT-------This Project is to make a small android app, but with a very nice [login to view URL] features :1. App should lock the screen during a certain time, so people cannot do anything with their phone during this time. (it"s like if you locked your screen and you forgot your password, but during a certain time)2. People could be able to call emergencies during this time and receive phone calls from people they chose.2. App should be installable on any android version, and compatible with lots of phone (in term of design, as phones have different size of screens).This is a very small and simple project , feel free to contact me if you have any question .Thank you ! PS : For the design, I have ideas, I only want you to be able to make a nice app.