draw charts lightweight libraries

draw charts lightweight libraries

I need to draw 3 graph inside my android app. Each graph will be inside a
fragment inside a viewPager layout, and each fragment will be keep in
memory while app is on focus. Also, when user tap on a point of graph a
popup with information of that point should appear. I0ve found afreechart
and achartengine libraries, but wich one is better for my purpose? the
main thing it's the lightweight memory request