Android RecyclerView LayoutManager异常

Question

嗨,我遇到了新问题 Android Lollipop RecyclerView

它会因以下异常而崩溃:

Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView$LayoutManager.onMeasure(android.support.v7.widget.RecyclerView$Recycler, android.support.v7.widget.RecyclerView$State, int, int)' on a null object reference

可以在此处找到完整堆栈跟踪

用于启动的代码RecyclerView与教程大致相同,但由于某种原因,这仍然会引发抱怨.任何帮助将不胜感激.

可以在以下位置访问代码:gist here和layout:this gist

没有views,或者objects是null

Answer 1

添加以下代码:

    LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
    layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
    recyclerView.setLayoutManager(layoutManager);

添加适配器之前:

recyclerView.setAdapter(adapter);