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Everywhere I look android programs are said to be built on three main components: Activities, Services, and Broadcast Receivers. So far I have Activities and Broadcast Receivers, but see no need for Services. Is this alright, or do I NEED to implement Services into my program.
You aren’t forced to have Services in your application. Services are only needed when your app needs to do something in the background. For instance a music player needs a Service that plays the music while the user is doing other things outside of the music player.