3 classes A open C and B open C which one trigged C android
<p>android 
I have 3 classes,the first and the second class goes to the third class by startactivityforresult and each one do a different treatment i want to know how from the third class i know which class(the first or the second) opened  the third class 
in other word A=>C and B=>C which one open C 
sorry for the bad English </p>
