Firebase发布IllegalAccessException apk

我在firebase项目控制台中为调试和发布密钥库添加了SHA1。我也更新了应用程序中的google-services.json文件。调试apk工作正常，并访问所有Firebase的实时数据库，但是当我构建发布apk时，我在访问Firebase数据库时遇到以下异常。Firebase发布IllegalAccessException apk

07-29 08:48:04.527 20997-20997/? E/AndroidRuntime: FATAL EXCEPTION: main 
    Process: com.entrance.nepal, PID: 20997 
    java.lang.RuntimeException: java.lang.IllegalAccessException: java.lang.Class<com.tenhaff.uniingress.fragments.UserListFragment$UserViewHolder> is not accessible from java.lang.Class<com.firebase.ui.database.FirebaseRecyclerAdapter> 
     at com.firebase.ui.database.FirebaseRecyclerAdapter.onCreateViewHolder(FirebaseRecyclerAdapter.java:171) 
     at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:5779) 
     at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5003) 
     at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4913) 
     at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2029) 
     at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1414) 
     at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1377) 
     at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:578) 
     at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3260) 
     at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3069) 
     at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3518)

来源

2016-07-29 Saurav Ghimire