When using ListFragment the setEmptyText Timesjava.lang.IllegalStateException: Can't be used with a custom content viewBug

 

today engage in a long time, was basically solved the problem .

 

  

 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     }

 

 

in the program

 

  

1 ((TextView)getListView().getEmptyView()).setText(getString(R.string.list_no_data));

 

 

so successful .

 

Why not use setEmptyText (CharSequence text) anyway, tried for a long time without success. did not know

 

  

static final int INTERNAL_EMPTY_ID = 0x00ff0001;

 

 

represent what the various test without success , google, degree of your mother for a long time , alas ..... I hope you know , please enlighten me !