Null Pointer exception in using support library share action provider

Question

Below is the code of my Activity . In this I am using the support library appcompat

   import android.content.Intent;
   import android.os.Bundle;
   import          


        

Answer 1

I changed this

android:actionProviderClass=widget.ShareActionProvider" />

To this

app:actionProviderClass=support.v7.widget.ShareActionProvider" />