title: Android studio fragment or new activity
body: <p>I have some activity(7-10) in my application and each of them has a common part (1/4 activities is common, 3/4 is totally different and a little complicated - a lot of buttons, images, lists etc.). Should I create one activity and 7-10 fragments and this is not too much so accplicattion won't be able to lags? I would like to avoid the effect of the common part will be refresh. What is the best way to solve this problem? One activity and some fragments or something with actiivty transition animation(is it possible to made effect that common part isn't refresh?-without any animation?)?</p>