RecyclerView类膨胀错误

Question

我的代码使用RecyclerView创建了一个CardViews列表。运行代码时，我一直收到一个奇怪的错误，声称我的xml文件中有一个错误。经过一番摸索，我发现如果将布局文件中的<RecyclerView>更改为<android.support.v7.widget.RecyclerView>，一切都能正常工作。为什么会这样呢？
我的活动。

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.Menu;
import android.view.MenuItem;

import java.util.ArrayList;


public class CardListActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_card_list);
        RecyclerView recyclerView = (RecyclerView)findViewById(R.id.cardList);
        recyclerView.setHasFixedSize(true);

        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(linearLayoutManager);

        ArrayList<String> list = new ArrayList<>();
        for(int i = 0; i < 20; i++) {list.add("Item " + i);}
        CardListAdapter cardListAdapter = new CardListAdapter(list);
        recyclerView.setAdapter(cardListAdapter);
    }

}

我的适配器

    import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

public class CardListAdapter extends RecyclerView.Adapter<CardListAdapter.CardListViewHolder> {

    private List<String> list;

    public CardListAdapter(List<String> list) {
        this.list = list;
    }

    @Override
    public CardListViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_layout,viewGroup,false);
        return new CardListViewHolder(v);
    }

    @Override
    public void onBindViewHolder(CardListViewHolder cardListViewHolder, int i) {
        String s = list.get(i);
        cardListViewHolder.title.setText(s);
    }

    @Override
    public int getItemCount() {
        return list.size();
    }


    public static class CardListViewHolder extends RecyclerView.ViewHolder {
        TextView title;
        public CardListViewHolder(View itemView) {
            super(itemView);
            title = (TextView)itemView.findViewById(R.id.title);
        }
    }

}

我的布局文件中，在将 <RecyclerView> 改为 <android.support.v7.widget.RecyclerView> 后，错误得到了修复。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".CardListActivity">

<RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/cardList">

    </RecyclerView>

当我使用 <RecyclerView> 运行时，我遇到了这个错误。

`Process: com.liquidink.lollipopmaterialui, PID: 7317
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.liquidink.lollipopmaterialui/com.liquidink.lollipopmaterialui.CardListActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class RecyclerView
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
     Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class RecyclerView
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:757)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
            at com.liquidink.lollipopmaterialui.CardListActivity.onCreate(CardListActivity.java:18)
            at android.app.Activity.performCreate(Activity.java:5933)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.RecyclerView" on path: DexPathList[[zip file "/data/app/com.liquidink.lollipopmaterialui-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
            at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
            at android.view.LayoutInflater.createView(LayoutInflater.java:571)
            at android.view.LayoutInflater.onCreateView(LayoutInflater.java:665)
            at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:65)
            at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
            at com.liquidink.lollipopmaterialui.CardListActivity.onCreate(CardListActivity.java:18)
            at android.app.Activity.performCreate(Activity.java:5933)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
    Suppressed: java.lang.ClassNotFoundException: android.view.RecyclerView
            at java.lang.Class.classForName(Native Method)
            at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
            at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
            ... 26 more
     Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

`

- Liquid Ink

Answer 1

您应该以这种方式将RecyclerView添加到XML中：

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/cardList">

</android.support.v7.widget.RecyclerView>

希望这能帮到你！

- Juan Saravia

---

你仍需要像@KuRoSan ER所说的那样，在你的gradle文件中添加implementation'com.android.support:recyclerview-v7:26.1.0'。 - Ilker Baltaci

Answer 2

RecyclerView没有包含在Android框架的基础部分，只有在布局中指定全名空间以外的基础Android框架小部件（如ListView、GridView等）可以使用。RecyclerView是recyclerview-v7支持库的一部分。

- hidro

Answer 3

我今天遇到了这个问题。

并解决了它。

第一步：确保你使用的支持库版本相同。

compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:support-v4:23.1.1'
compile 'com.android.support:recyclerview-v7:23.1.1'

第二步：您需要将RecyclerView添加到您的proguard文件中。

-keep class android.support.v7.widget.** {*;}
// I`ve just keep all widgets

- KuRoSan ER.

---

没有其他解决方案奏效，将上述行添加到我的pro-guard文件中是有效的。值得一提的是，如果您的应用程序在调试构建中运行正常，但在发布版本中出现了回收视图膨胀异常，则上述方法肯定是正确的解决方案，因为proguard仅用于发布版本而不是调试版本。谢谢。 - Mark

Answer 4

在将RecyclerView添加到您的XML之前，请务必包含以下内容

compile 'com.android.support:recyclerview-v7:22.2.0'
compile 'com.android.support:appcompat-v7:22.2.0'

如果在添加这些依赖项之前在XML中创建了RecyclerView，则需要删除（注释）您的RecyclerView，然后在没有它的情况下构建项目，然后再将其添加回来才能使其正常工作。否则，它仍会显示二进制XML行＃n中的膨胀异常。

- Ivan V

---

我正在使用Eclipse并遇到问题。我已经在以下网址发布了我的问题：http://stackoverflow.com/questions/33375943/error-inflating-class-recycler-view?noredirect=1#comment54546208_33375943 我尝试了您的建议，先在XML中包含库，然后再包含RecyclerView小部件，但我仍然遇到同样的问题。请问您能否提供帮助？ - ghostrider

Answer 5

1. 检查 build.gradle 中的引用
2. 在您的布局 xml 文件中，将 RecyclerView 组件的名称作为整体与其包一起编写，例如 android.support.v7.widget.RecyclerView 而不是像 RecyclerView 这样

现在准备就绪。祝你好运。

- fatih