Fragment does not show when switching between tabs on TabHost
<p>i have a tab host  with three tabs  ,two of them have activities that contain the same   subclass of Fragment (i am testing the behaviour of the fragment on different positions) .So when i switch from the first tab to the second the Fragment shows succesfully ,but when i come back to the fisrt nothing is on  screen .May be it is a problem of lifecycle ,can someone help me to figure out a solution to  that ?</p>

<p>for informations,i am working with android.support.v4 package .</p>
