should I learn java to its core ..I want to learn android ..

Question

friend of mine told me that I should learn basics only for java and not deeply

Answer 1

even knowing logic of java, c++ I am struggling with android app development

Answer 2

I think the best way to learn Java is through Processing Language. Its mainly used for drawing and animatimg computer grapichs. Many Libraries for GUI is availble. You can master the basics of gui programming using this platform.