条形图(MPAndroidChart)加载数据后条形宽度减小

I have searched a lot and could not found any suitable solution for my requirement. While loading data for the first time the bar width is OK , but for large amount of data the bar width gets reduced, I did many changes on that but nothing worked. I have attached the code and pics below.and legend is not working while set Axis data on bar chart any help? I have searched a lot and could not found any s