android.view.InflateException : Error inflating class android. 支持.v7.widget.CardView

Question

我知道这个问题被问过几次，但它们都与 eclipse 相关，而且我使用的是 Android Studio，因此这些答案对我没有帮助。我正在尝试将 CardView 包含在我的一个回收站 View 项目的 fragment 中。下面的 XML 代码:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:padding="8dp" >

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        card_view:cardUseCompatPadding="true"
        card_view:cardElevation="4dp"
        android:foreground="?attr/selectableItemBackground"
        android:clickable="true"
        android:id="@+id/cv" >

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="16dp" >

            <TextView
                android:id="@+id/title"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="18sp"
                android:textStyle="bold"
                android:textColor="@color/mainBodyText"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_alignParentTop="true" />

            <TextView
                android:id="@+id/text"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/title"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_marginTop="5dp"
                android:textColor="@color/mainBodyText"
                android:textSize="16sp"
                android:textStyle="italic"/>

        </RelativeLayout>

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

</LinearLayout>

以及下面app模块的build.gradle文件:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.myapp.myapp"
        minSdkVersion 9
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.1'
    compile 'com.android.support:cardview-v7:22.2.1'
    compile 'com.android.support:recyclerview-v7:22.2.1'
    compile 'com.android.support:support-v4:22.2.1'
}

在运行时我得到以下异常:

08-02 14:37:07.693  10102-10102/com.myapp.myapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.myapp.myapp, PID: 10102
    android.view.InflateException: Binary XML file line #10: Error inflating class android.support.v7.widget.CardView
            at android.view.LayoutInflater.createView(LayoutInflater.java:633)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            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 com.myapp.myapp.adapter.MyAdapter.onCreateViewHolder(MyAdapter.java:29)
            at com.myapp.myapp.adapter.MyAdapter.onCreateViewHolder(MyAdapter.java:17)
            at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:5116)
            at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4416)
            at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4326)
            at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1955)
            at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1364)
            at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1327)
            at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:556)
            at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2713)
            at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3011)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:907)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
            at android.view.View.layout(View.java:15614)
            at android.view.ViewGroup.layout(ViewGroup.java:4968)
            at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2102)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1859)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1077)
            at android.view.ViewRootImpl$TraversalRunnabl

为什么会发生这种情况，我该如何解决？

Answer 1

经过几天的努力，我解决了这个问题。无论如何，这是非常简单的解决方案。这里的要点是，在膨胀 View 时，我需要使用 View 的父级上下文。早些时候我使用了应用程序的上下文。新代码如下所示:

@Override
public SearchItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    return new SearchItemViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.search_item, parent, false));
}

早些时候是:

@Override
public SearchItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    return new SearchItemViewHolder(LayoutInflater.from(context).inflate(R.layout.search_item, parent, false));
}

context 是从 Activity 传递过来的，它是使用 getApplicationContext() 获得的。