create two different layout folders in an android project -

i trying incorporate 2 builds(say build , build b) within single android project. , have created global constant boolean variable (say flag). based on theflag value , want resources loaded respective build.

is possible create 2 different layout_a , layout_b folders instead of default layout folder in activities call upon resources required folders. or

should create different files homepage_a.xml , homepage_b.xml ?

e.g

 in activity class , want use   if(flag)     setcontentview(r.layout_a.homepage);  else      setcontentview(r.layout_b.homepage);   instead of   if(flag)     setcontentview(r.layout.homepage_a);  else    setcontentview(r.layout.homepage_b); 

thank you.