My Problem is I Am doing A population Summary Analysis App and in my app there is a list and based on that list a chart will be provided and the charts are bar-chart and pie chart if i wanna see by bar chart i select bar chart in menu list on by using drawer that are chart bar and pie chart and if i wanna see the pie chart one i click the pie chart and the chart bar is change to pie chart so my problem is how to switch the screen between chart bar and pie chart with out changing the whole screen note that the default display is chart bar

i am expected good answer based on the question that i gave to on the above