使用 ListFragment 在 Android FragmentActivity 中找不到 id 的视图

Question

我正在尝试创建自定义 ListView。当我测试我的代码时，我收到以下错误

03-09 19:21:10.425: E/AndroidRuntime(379): java.lang.RuntimeException: Unable to start      activity ComponentInfo{com.anomaly.punchlist/com.anomaly.punchlist.TeamActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f08000c for fragment TeamListFragment{4067a358 #0 id=0x7f08000c}

除了阅读有关 Fragments、ListFragments 和 ListViews 的 Android 文档之外，我在发布此问题之前还参考了以下链接。

链接 1：FragmentActivity onCreateView
链接二：Problem using ListFragment on Android
链接3：Android Fragment no view found for ID?
链接4：Android ListFragment is to confusing
链接5：How update ListView in ListFragment from FragmentActivity?
链接6：Populate ListFragments with a custom view?

我有扩展 FragmentActivity 的 TeamActivity 类和扩展 ListFragment 并实现 LoaderManager.LoaderCallbacks 的 TeamListFragment。请看下面的代码：

TeamActivity.java

package com.anomaly.punchlist;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

public class TeamActivity extends FragmentActivity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction =  fragmentManager.beginTransaction();
    TeamListFragment teamListFragment = new TeamListFragment();
    fragmentTransaction.add(R.id.android_teamList, teamListFragment);
    fragmentTransaction.commit();       
   }

 }

TeamListFragment.java

package com.anomaly.punchlist;

    import android.database.Cursor;
    import android.os.Bundle;
    import android.support.v4.app.ListFragment;
    import android.support.v4.app.LoaderManager;
    import android.support.v4.content.CursorLoader;
    import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;

import com.anomaly.punchlist.contentprovider.basecolumns.TeamBaseColumns.Team;
import com.j256.ormlite.logger.Logger;
import com.j256.ormlite.logger.LoggerFactory;

public class TeamListFragment extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor> {

    private static Logger logger = LoggerFactory.getLogger(TeamListFragment.class);
    private ListView listView;
    private SimpleCursorAdapter adapter;
    private static final int TEAM_LOADER_ACTIVITY = 0x01;
    private static final String[] PROJECTION = new String[] { "project_manager_id", "contact_id", "project_id" };
    private static String SELECTION = "contact_id = ? AND project_id = ?";

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        try {
            super.onCreate(savedInstanceState);
            int[] uiBindTo = { R.id.text1 };
            getLoaderManager().initLoader(TEAM_LOADER_ACTIVITY, null, this);
            adapter = new SimpleCursorAdapter(getActivity().getApplicationContext(), R.layout.team, null, null, uiBindTo, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);

        } catch (Exception e) {
            logger.error(e.getMessage());
            new RuntimeException("RuntimeException occurred in onCreate() method of TeamActivity." + e);
        }
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int arg0, Bundle bundle) {

        String contactId = new String();
        String projectId = new String();
        CursorLoader cursorLoader = null;

        if (bundle != null) {
            contactId = bundle.getString("contact_id");
            projectId = bundle.getString("project_id");

        }
        String[] selectionArgs = { contactId + ", " + projectId };
        cursorLoader = new CursorLoader(getActivity(), Team.CONTENT_URI, PROJECTION, SELECTION, null, null);
        return cursorLoader;
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        adapter.swapCursor(cursor);
        setListShown(true);

    }

    @Override
    public void onLoaderReset(Loader<Cursor> cursor) {
        adapter.swapCursor(null);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        onCreate(savedInstanceState);
        View teamView = inflater.inflate(R.layout.team, container, false);
        return teamView;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        listView = getListView();
        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        setListAdapter(adapter);
        setListShown(true);
    }

}

除了上面的代码，我还有以下自定义布局。

team.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingLeft="8dp"
    android:paddingRight="8dp" >


    <ListView
        android:id="@+id/android:teamList"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@color/grey2"
        android:divider="@color/blue2"
        android:dividerHeight="1dp"
        android:drawSelectorOnTop="false" />

    <TextView
        android:id="@id/android:empty"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FF0000"
        android:text="No data" />
</LinearLayout>

Answer 1

在您的Activity 的onCreate() 方法中使用setContentView(R.layout.activity) 方法并定义一个布局文件，其中包含LinearLayout 内的FrameLayout。

现在使用您刚刚添加的 FrameLayout 的 id 调用 add() 方法，而不是您在 onCreate() 中使用的 R.id.android_teamList 并在您的 android:id="@+id/android:teamList" 中替换 android:id="@+id/android:teamList" team.xml 布局文件。

顺便说一句，如果您必须这样做，您可以使用android.R.id.list 访问您的ListView。

Answer 2

R.id.text1 应该在R.layout.team 中定义。

查看SimpleCursorAdapter doc：

定义视图的布局文件的资源标识符 项目清单。布局文件应至少包含那些命名视图 在“to”中定义