Flip from Bar graph to Line graph then to Bar garph again

What steps will reproduce the problem?
1.create a bar graph 
2. create  a line graph
3. then flip from one to another.

What is the expected output? What do you see instead?
I want to flip from one line grap to a bar graph and then back to line graph 
after certain intervals-- automatically.is it possible using Achartengine ?

Please provide a source code snippet that we can use to replicate the issue.

What version of the product binary library are you using?

Please provide any additional information below.

Original issue reported on code.google.com by sujoy...@gmail.com on 9 Nov 2012 at 1:06

yuxinburen / achartengine

Flip from Bar graph to Line graph then to Bar garph again #254