No View Found For id in Android FragmentActivity with ListFragment
我正在尝试创建自定义ListView。 测试代码时,出现以下错误
1 | 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文档外,在发布此问题之前,我还引用了以下链接。
链接1:FragmentActivity onCreateView
链接2:在Android上使用ListFragment时出现问题
链接3:Android片段找不到ID的视图?
链接4:Android ListFragment令人困惑
链接5:如何从FragmentActivity更新ListFragment中的ListView?
链接6:使用自定义视图填充ListFragments?
我有扩展了FragmentActivity的TeamActivity类和扩展了ListFragment并实现LoaderManager.LoaderCallbacks的TeamListFragment。 请参见下面的代码:
TeamActivity.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | <?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> |
在Activity的
现在,使用刚刚添加的FrameLayout的ID代替
顺便说一句,如果需要的话,可以使用
检查SimpleCursorAdapter文档:
resource identifier of a layout file that defines the views for this
list item. The layout file should include at least those named views
defined in"to"