create an android application to send a phone call to many numbers "one after one"

Hello everyone I want to create an android application to send a phone call to many numbers "one after one" I want to choose the voice message file or recording it After that, I will add many numbers to call and play the voice for them The application will use the phone line And when any number is close or busy, the application must try to call it after some minutes after finishing all calls, the application will give me a list for successful calls and unsuccessful call like this service : [login to view URL] we want to develop it after the finishing the first version for the application Thanks a lot