Question

我收到此错误：

Caused by: java.lang.RuntimeException: 
    Your content must have a ListView whose id attribute is 'android.R.id.list'

这是HomeScreen.java：

public class HomeScreen extends ListActivity {

    String TAG = AppConstants.TAG;

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home);

        CBasicInfo basicinfo_data[] = new CBasicInfo[]
                {
                    new CBasicInfo("Projet A", 1, new Date()),
                    new CBasicInfo("Projet A", 2, new Date()),
                    new CBasicInfo("Projet A", 3, new Date()),
                    new CBasicInfo("Projet A", 4, new Date()),
                    new CBasicInfo("Projet A", 5, new Date())
                };

        BasicInfoAdapter adapter = new BasicInfoAdapter(this, R.layout.home_screen_list_item, basicinfo_data);
        ListView list_view = (ListView)findViewById(R.id.lvSavedProjects);
        list_view.setAdapter(adapter);
    }
}

这里是我的适配器BasicInfoAdapter.java：

public class BasicInfoAdapter extends ArrayAdapter<CBasicInfo>{

    Context context; 
    int layoutResourceId;    
    CBasicInfo data[] = null;

    public BasicInfoAdapter(Context context, int layoutResourceId, CBasicInfo[] data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        BasicInfoHolder holder = null;

        if(row == null)
        {
            LayoutInflater inflater = ((Activity)context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);

            holder = new BasicInfoHolder();
            holder.txtName = (TextView)row.findViewById(R.id.tvHomeScreenProjectName);
            holder.txtPid = (TextView)row.findViewById(R.id.tvHomeScreenPid);
            holder.txtDDate = (TextView)row.findViewById(R.id.tvHomeScreenDownloadDate);

            row.setTag(holder);
        }
        else
        {
            holder = (BasicInfoHolder)row.getTag();
        }

        CBasicInfo bi = data[position];
        holder.txtName.setText(bi.getName());
        holder.txtPid.setText(bi.getId());
        holder.txtDDate.setText(bi.getExportDate().toString());

        return row;
    }

    static class BasicInfoHolder
    {
        TextView txtName;
        TextView txtPid;
        TextView txtDDate;
    }
}

我的home.xml是：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/lbl_saved_projects"
        android:textAppearance="?android:attr/textAppearanceLarge" />
    <ListView
        android:id="@+id/lvSavedProjects"
        android:name="android.app.ListFragment"
        android:layout_width="match_parent"
        android:layout_height="0dip"
        android:layout_weight="0.86" />
    <Button
        android:id="@+id/bDownloadMoreProjects"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/lbl_download_more_projects" />
</LinearLayout>

我在这里做错了什么？

THX

编辑：

堆栈跟踪显示：

FATAL EXCEPTION: main
android.content.res.Resources$NotFoundException: String resource ID #0x1
    at android.content.res.Resources.getText(Resources.java:247)
    at android.widget.TextView.setText(TextView.java:3473)
    at com.snip.tnc.SnipForAndroid.BasicInfoAdapter.getView(BasicInfoAdapter.java:48)
    at android.widget.AbsListView.obtainView(AbsListView.java:2033)
    at android.widget.ListView.makeAndAddView(ListView.java:1772)
    at android.widget.ListView.fillDown(ListView.java:672)
    at android.widget.ListView.fillFromTop(ListView.java:732)
    at android.widget.ListView.layoutChildren(ListView.java:1625)
    at android.widget.AbsListView.onLayout(AbsListView.java:1863)
    at android.view.View.layout(View.java:11278)
    at android.view.ViewGroup.layout(ViewGroup.java:4224)
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
    at android.view.View.layout(View.java:11278)
    at android.view.ViewGroup.layout(ViewGroup.java:4224)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
    at android.view.View.layout(View.java:11278)
    at android.view.ViewGroup.layout(ViewGroup.java:4224)
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
    at android.view.View.layout(View.java:11278)
    at android.view.ViewGroup.layout(ViewGroup.java:4224)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
    at android.view.View.layout(View.java:11278)
    at android.view.ViewGroup.layout(ViewGroup.java:4224)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1489)
    at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4424)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    at dalvik.system.NativeStart.main(Native Method)

Answer 1

错误很明显：

您的内容必须包含一个ListView，其id属性为'android.R.id.list'

所以看来你R.layout.home没有。顺便说一下，您的问题与Adapter s无关，但与ListActivity无关。

布局中的ListView应将其作为id属性：

android:id="@android:id/list`

我不确定你的android:name属性是做什么的。

Answer 2

正如K-Ballo指出的那样，ListActivity的布局必须为ListView，其ID为android.R.id.list。第一部分（android.R）转换为@android:，第二部分转换为id/list所以......

将您ListView的ID设为@android:id/list。它会自动使用。

然后，您应该删除使用findViewById(...)的行（ListActivity不需要）。那你就用......

setListAdapter(adapter);

您无需找到ListView来设置Adapter，因为ListActivity公开的上述方法会自动执行此操作。

但是，如果您确实需要ListView用于其他目的，请使用...

getListView();

ListView的自定义适配器导致错误

2 个答案: