Android 正在与上下文膨胀RecyclerView列表项进行斗争

在完成了许多关于RecyclerViews的教程之后，我不断地让我的应用程序在这条线上崩溃：

View view = inflater.inflate(R.layout.layout_listitem, parent, false);

这可能是由于充气器对象为空，因为上下文为空：

LayoutInflater inflater = LayoutInflater.from(context);

但是，如果我在RecycleServiceAdapter的构造函数中传递上下文，我不理解为什么它为null：

public RecycleViewAdapter(Context context) {
    this.context = context;    
}

从我的片段活动：

View view = inflater.inflate(R.layout.fragment_home, container, false);
    recyclerView = (RecyclerView) view.findViewById(R.id.matches);
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    recyclerView.setAdapter(new RecycleViewAdapter(getActivity()));
    return view;

我尝试了getContext（）、getActivity（），甚至重写了onAttach方法，从那里获取上下文，但仍然崩溃。我不熟悉使用片段，所以我不知道自己在做什么，只是使用人们在论坛上尝试过的解决方案

日志：

09-07 09:48:14.433 7594-7594/? E/AndroidRuntime: FATAL EXCEPTION: main
                                             Process: maginate.net.thebestrapper, PID: 7594
                                             java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
                                                 at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:722)
                                                 at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
                                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
                                                 at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
                                                 at maginate.net.thebestrapper.RecycleViewAdapter.onCreateViewHolder(RecycleViewAdapter.java:40)
                                                 at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:6685)
                                                 at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5869)
                                                 at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5752)
                                                 at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5748)
                                                 at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2232)
                                                 at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1559)
                                                 at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1519)
                                                 at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:614)
                                                 at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3812)
                                                 at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3529)
                                                 at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4082)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
                                                 at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
                                                 at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1702)
                                                 at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1556)
                                                 at android.widget.LinearLayout.onLayout(LinearLayout.java:1465)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
                                                 at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1702)
                                                 at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1556)
                                                 at android.widget.LinearLayout.onLayout(LinearLayout.java:1465)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
                                                 at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1702)
                                                 at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1556)
                                                 at android.widget.LinearLayout.onLayout(LinearLayout.java:1465)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
                                                 at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
                                                 at android.view.View.layout(View.java:16916)
                                                 at android.view.ViewGroup.layout(ViewGroup.java:5405)
                                                 at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2413)
                                                 at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2122)
                                                 at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1264)
                                                 at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6942)
                                                at 

方法1：- 使用适配器构造函数传递父上下文，然后使用构造函数上下文

方法2：- 像这样使用父上下文：-

@Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
this.context = parent.getContext();
        RecyclerView.ViewHolder vh;

        View v = LayoutInflater.from(context).inflate(R.layout.anylayout, parent, false);
        vh = new RowVH(v);

        return vh;
    }

方法1：- 使用适配器构造函数传递父上下文，然后使用构造函数上下文

方法2：- 像这样使用父上下文：-

@Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
this.context = parent.getContext();
        RecyclerView.ViewHolder vh;

        View v = LayoutInflater.from(context).inflate(R.layout.anylayout, parent, false);
        vh = new RowVH(v);

        return vh;
    }

---

您不需要将

上下文

实例传递给

适配器

确保您仅尝试在适配器的

onCreateViewHolder（）

方法中绑定布局，您可以从

父项

参数获取

上下文

：

new YourViewHolderClass(LayoutInflater.from(parent.getContext()).inflate(R.layout.your_layout_xml, parent, false));

---

您不需要将

上下文

实例传递给

适配器

确保您仅尝试在适配器的

onCreateViewHolder（）

方法中绑定布局，您可以从

父项

参数获取

上下文

：

new YourViewHolderClass(LayoutInflater.from(parent.getContext()).inflate(R.layout.your_layout_xml, parent, false));

---

java.lang.NullPointerException:尝试调用虚拟方法“boolean java.lang.String.equals（java.lang.Object）”

java.lang.NullPointerException:尝试调用虚拟方法“boolean java.lang.String.equals（java.lang.Object）”