发布apk中的Firebase IllegalAccessException

Question

我在firebase项目控制台中为debug和release keystore添加了SHA1.我还在应用中通过google-services.json文件进行了更新.Debug apk工作正常并访问firebase的所有实时数据库但是当我构建版本apk时,我在访问Firebase数据库时遇到以下异常.

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)

Answer 1

ViewHolder类应该是公共的而不是私有的或受保护的.这是因为proguard.