Question on Java(Android) onFling

[Naziru Gelajo]

Hello, I'm trying to figure out how to fling an ImageView within a RelativeLayout in a direction that won't go off the screen. If you view my YouTube video for my project, the ball is not travelling very far in this penalty shootout mini-game.

Are there any good tutorials on what to do with the soccerball? or any hints on how to make sure it goes towards the goal and no where else? Thanks!