android - 发布 apk 中的 Firebase IllegalAccessException

Question

我在 firebase 项目控制台中为调试和发布 keystore 添加了 SHA1。我还通过应用程序中的 google-services.json 文件进行了更新。调试 apk 工作正常并访问 firebase 的所有实时数据库，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。

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(public)的，而不是私有(private)的或 protected 。这是因为proguard。