在使用ListFragment的setEmptyText时报java.lang.IllegalStateException: Can't be used with a custom content view错误

今天搞了好久, 才基本解决了这个问题. 

 1 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="match_parent"
 3     android:layout_height="match_parent" >
 4     
 5     <ListView 
 6         android:id="@android:id/list"  <!--这样命名我就不多说了-->
 7         style="@style/MyListView"
 8         android:layout_width="match_parent"
 9         android:layout_height="match_parent"/>
10 
11     <TextView 
12         android:id="@android:id/empty"  <!-- 为什么这样命名,且看下文 -->
13         android:layout_width="wrap_content"
14         android:layout_height="wrap_content"
15         android:layout_gravity="center"/>
16         
17 </FrameLayout>
//且看源码ListFragment


 1 private void ensureList() {
 2         if (mList != null) {
 3             return;
 4         }
 5         View root = getView();
 6         if (root == null) {
 7             throw new IllegalStateException("Content view not yet created");
 8         }
 9         if (root instanceof ListView) {
10             mList = (ListView)root;
11         } else {
12             mStandardEmptyView = (TextView)root.findViewById(INTERNAL_EMPTY_ID);
13             if (mStandardEmptyView == null) {
14                 mEmptyView = root.findViewById(android.R.id.empty);  //且看这里
15             } else {
16                 mStandardEmptyView.setVisibility(View.GONE);
17             }
18             mProgressContainer = root.findViewById(INTERNAL_PROGRESS_CONTAINER_ID);
19             mListContainer = root.findViewById(INTERNAL_LIST_CONTAINER_ID);
20             View rawListView = root.findViewById(android.R.id.list);
21             if (!(rawListView instanceof ListView)) {
22                 if (rawListView == null) {
23                     throw new RuntimeException(
24                             "Your content must have a ListView whose id attribute is " +
25                             "'android.R.id.list'");
26                 }
27                 throw new RuntimeException(
28                         "Content has view with id attribute 'android.R.id.list' "
29                         + "that is not a ListView class");
30             }
31             mList = (ListView)rawListView;
32             if (mEmptyView != null) {
33                 mList.setEmptyView(mEmptyView);
34             } else if (mEmptyText != null) {
35                 mStandardEmptyView.setText(mEmptyText);
36                 mList.setEmptyView(mStandardEmptyView);
37             }
38         }
39         mListShown = true;
40         mList.setOnItemClickListener(mOnClickListener);
41         if (mAdapter != null) {
42             ListAdapter adapter = mAdapter;
43             mAdapter = null;
44             setListAdapter(adapter);
45         } else {
46             // We are starting without an adapter, so assume we won't
47             // have our data right away and start with the progress indicator.
48             if (mProgressContainer != null) {
49                 setListShown(false, false);
50             }
51         }
52         mHandler.post(mRequestFocus);
53     }

在程序中重写

@Override
public void setEmptyText(CharSequence text) {
    TextView emptyView = (TextView)getListView().getEmptyView();
    emptyView.setVisibility(View.GONE);
    emptyView.setText(text);
}

然后就可以

setEmptyText(getString(R.string.list_no_data));

这样就成功了.

setEmptyText(CharSequence text) 只能用在ListFragment默认视图. 其背后还是用的ListView的setEmptyView()所以可以通过getEmptyView获取这个视图.

posted @ 2013-05-29 18:00  小草房Fang  阅读(2234)  评论(1)  编辑  收藏  举报