NullPointerException on setVisibility function in FrameLayout : <p>I have developed android project and published to a google playstore.
In this app, for tab use, at one activity, calling frameLayout.setVisibility(View.INVISIBLE) for showing other layouts.
It is working perfectly on my android devices.</p>

<p>But when i check crashlytics, i can see applications crashed on that function.</p>

<p>I tried many google searches but i did not found the solution and did not fix yet.</p>

<p>Please help me on this issue.</p>
