normally i am using Intent to start activity.So in my app there is a home page.Inside home page there are several links .So i used Intent to call those activities.So when i go to sub activity,each one has home button.So when click home button i used Intent to call Home calss.Is it good method as it always called OnCreate method.Actually i don't need to call onCreate when i call home activity when i am inside sub activity?its just ok to call OnResume.
So everything is clear now? If not, please do not post again about this before you have read the javadocs of the Activity class. ALL of it. You simply can not develop for Android without a deep understanding of that.