First time developing for Android and ....

[1XU7]

Hello!

I would like to know the workflow for accessing to Android system in general...
For instance, my Qt Application needs to make a call, display a map, launch another application, play music and video, send an instant alert sound to another device via internet, that basically...

I know Qt has a lot of stuffs that can help, but i'm not sure if it has the tool to completely access the phone since this is too much dense (or does it has?).

Can i do all these things using the only Qt's Library? Do i need external library or Java use?
Thanks.