Question

发布了第一个问题，哇！

您好，我正在实现现在包含在v7 android支持库中的CardView和RecyclerView库，但是当应用程序运行时，它会在充气CardView布局时退出。我已经做了大量的网络搜索并发现了一些有用的东西，但问题仍然存在。

我已根据此处给出的说明导入了CardView和RecyclerView库： https://developer.android.com/tools/support-library/setup.html#libs-with-res（我正在使用Eclipse），然后我将它们添加到我构建的应用程序引用的库列表中（在Project Properties＆gt; Android＆gt; Libraries下）。但似乎至少没有正确导入CardView库，或者依赖项是错误的，或者因为代码似乎是正确的。

以下是使用RecyclerView的相关部分片段：

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
    mLayout = (RelativeLayout) inflater.inflate(R.layout.fragment_jamboree_info, container, false);
    return mLayout;
}

@Override
public void onActivityCreated(@Nullable
Bundle savedInstanceState) {

    RecyclerView recList = (RecyclerView) mLayout.findViewById(R.id.cardList);
    recList.setHasFixedSize(true);
    LinearLayoutManager llm = new LinearLayoutManager(getActivity());
    llm.setOrientation(LinearLayoutManager.VERTICAL);
    recList.setLayoutManager(llm);

    // make and set the adapter
    CardAdapter adapter = new CardAdapter(mDataSet);
    recList.setAdapter(adapter);

    super.onActivityCreated(savedInstanceState);
}

这是R.layout.fragment_jamboree_info：

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".activities.MainActivity" >

    <android.support.v7.widget.RecyclerView
        android:id="@+id/cardList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".activities.MainActivity" />    
</RelativeLayout>

这是CardAdapter代码：

public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {

private ArrayList<ParseObject> mDataSet;

public CardAdapter(ArrayList<ParseObject> dataSet) {
    mDataSet = dataSet;
}

// Size of the dataset (invoked by the layout manager)
@Override
public int getItemCount() {
    return mDataSet.size();
}

/** Provide a reference to the type of views that you are using (custom ViewHolder) */
public static class ViewHolder extends RecyclerView.ViewHolder {
    protected TextView vTitle;

    public ViewHolder(View v) {
         super(v);
         vTitle = (TextView) v.findViewById(R.id.TV_title);
    }
}

// Create new views (invoked by the layout manager)
@Override   
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
    LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());

    // ** This is where it crashes ** // 
    View v = inflater.inflate(R.layout.card_jamboree_info, viewGroup, false);

    return new ViewHolder(v);
}

// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder viewHolder, final int position) {
    viewHolder.vTitle.setText(mDataSet.get(0).getString("title"));
}

}

这里是R.layout.card_jamboree_info - 这个CardView似乎是个问题......

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:layout_margin="8dp"
    android:orientation="vertical"
    android:background="@color/grey_light"
    card_view:cardCornerRadius="5dp" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white" >

        <TextView
            android:id="@+id/TV_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="16dp"
            android:textSize="32sp"
            android:text="@string/basic_error" />

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

最后，冒着太多信息的风险，这里是错误日志：

01-21 23:00:10.964: D/AndroidRuntime(15128): Shutting down VM
01-21 23:00:10.980: E/AndroidRuntime(15128): FATAL EXCEPTION: main
01-21 23:00:10.980: E/AndroidRuntime(15128): Process: com.evoqe, PID: 15128
01-21 23:00:10.980: E/AndroidRuntime(15128): android.view.InflateException: Binary XML file line #2: Error inflating class android.support.v7.widget.CardView
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.LayoutInflater.createView(LayoutInflater.java:633)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at com.evoqe.adapters.CardAdapter.onCreateViewHolder(CardAdapter.java:56)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at com.evoqe.adapters.CardAdapter.onCreateViewHolder(CardAdapter.java:1)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:4121)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3431)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3340)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1810)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1306)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1269)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:523)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:1988)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:2237)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:890)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.View.layout(View.java:15596)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewGroup.layout(ViewGroup.java:4966)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2072)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1829)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
01-21 23:00:10.980: E/AndroidRuntime(15128):    at andro

代码似乎是正确的，所以我怀疑这个问题是依赖性的。我在编写代码时遵循了这两个教程：

http://www.binpress.com/tutorial/android-l-recyclerview-and-cardview-tutorial/156 和 treyrobinson.net/blog/android-l-tutorials-part-3-recyclerview-and-cardview /

任何帮助都非常感谢！提前谢谢。

Answer 1

我认为您需要在内部导入libs CardView，RecycleView和appcompat_v7，就像首先从项目中删除appcompat_v7 * Project＆gt; properties＆gt; Android＆gt;删除Apply和Ok *然后从你的HardDrive导入reclyce View，Card View和appcompat_v7以及（如果需要的话，appcompat_v4）到你的项目libs文件夹然后从项目＆gt;属性＆gt; JavaBuildPath＆gt;添加Jar而不是Add external然后Jar从项目libs文件夹中选择库。然后，您需要更改styles.xml中的主题。

  <style name="AppBaseTheme" parent="Theme.AppCompat.Light">

到

<style name="AppBaseTheme" parent="@android:style/Theme.Holo.Light">

和其他styles.xml中的相同

因为删除后不再支持Appcompat.Light。

然后清理并运行。希望它可能有效！

Answer 2

如果您已经尝试了解决方案中的所有内容，那么需要检查我之前做过的这个小错误。

如果您的清单文件的目标sdk版本为 21 。不低于此。

  <uses-sdk
        android:minSdkVersion="11" //anything you need
        android:targetSdkVersion="21" />

因为在互联网上尝试了所有内容后，我通过将目标从 17 更改为 21 来解决了recyclelerview膨胀错误。

可能这对未来的某些人有帮助，而不是像我一样浪费时间。

扩展XML android.support.v7.widget.CardView时出错

2 个答案: