February 3rd, 2013, 11:08 AM
Join Date: Feb 2013
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how hard it will be for you to learn android is 'hard' to say, it greatly depends on your prior experience with other programming languages, your knowledge in basic programming principles (e.g. oop) and especially your motivation.
If you have prior knowledge in java/c++/c# you can download Eclipse and start with your first steps in android going through the tutorials provided by google here
To create life wallpapers you especially need 'design & graphics skills' to make your 'vision' work, aditionally you need some basic understanding of android and how to create those wallpapers, for example you can find a basic tutorial here.
Here's what I think about game developement:
Don't think about it before you have profound knowledge in java & android, it will only frustrate you... Aditionally you need understanding of 2d or 3d game engines, maybe knowledge in opengl, strong 'design & graphics skills' to visualize your concepts, etc...