blocks|key|1790712|text|应该是这样的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1790713|<TextView+android:id="@android:id/empty"
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:text="No+Results"+/>|code-block|syntax|javascript|1790714|请注意id属性。|1790715|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It should be like this:

<pre><code>&lt;TextView android:id="@android:id/empty"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:text="No Results" /&gt;
</code></pre>

Note the id attribute.

blocks|key|1790742|text|正如appsthatmatter所说，在布局中类似于：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1790743|<ListView+android:id="@%2Bid/listView"+...+/>
<TextView+android:id="@%2Bid/emptyElement"+...+/>|code-block|syntax|javascript|1790744|在链接的活动中：|1790745|this.listView+=+(ListView)+findViewById(R.id.listView);
this.listView.setEmptyView(findViewById(R.id.emptyElement));|1790746|也适用于GridView..。|1790747|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

As appsthatmatter says, in the layout something like:

<pre><code>&lt;ListView android:id="@+id/listView" ... /&gt;
&lt;TextView android:id="@+id/emptyElement" ... /&gt;
</code></pre>

and in the linked Activity: 

<pre><code>this.listView = (ListView) findViewById(R.id.listView);
this.listView.setEmptyView(findViewById(R.id.emptyElement));
</code></pre>

Does also work with a GridView...

blocks|key|2004460|text|我遇到了这个问题。我必须让我的类扩展ListActivity而不是Activity，并将XML中的列表重命名为android:id="@android:id/list"|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2004461|entityMap^0|1J|T|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I had this problem. I had to make my class extend ListActivity rather than Activity, and rename my list in the XML to <code>android:id="@android:id/list"</code>

blocks|key|2004511|text|活动代码，重要的是要扩展ListActivity。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2004512|package+com.example.mylistactivity;

import+android.app.ListActivity;
import+android.os.Bundle;
import+android.widget.ArrayAdapter;
import+com.example.mylistactivity.R;

//+It's+important+to+extend+ListActivity+rather+than+Activity
public+class+MyListActivity+extends+ListActivity+{

++++@Override
++++public+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.mylist);

++++++++//+shows+list+view
++++++++String[]+values+=+new+String[]+{+"foo",+"bar"+};

++++++++//+shows+empty+view
++++++++values+=+new+String[]+{+};

++++++++setListAdapter(new+ArrayAdapter<String>(
++++++++++++++++this,
++++++++++++++++android.R.layout.simple_list_item_1,
++++++++++++++++android.R.id.text1,
++++++++++++++++values));
++++}
}|code-block|syntax|javascript|2004513|布局xml，两个视图中的id都很重要。|2004514|<?xml+version="1.0"+encoding="utf-8"?>
<LinearLayout
++++xmlns:android="http://schemas.android.com/apk/res/android"
++++android:orientation="vertical"
++++android:layout_width="fill_parent"
++++android:layout_height="fill_parent">

++++
++++<ListView
++++++++android:id="@android:id/list"
++++++++android:layout_width="fill_parent"
++++++++android:layout_height="fill_parent"/>

++++
++++<TextView
++++++++android:id="@android:id/empty"
++++++++android:layout_width="fill_parent"
++++++++android:layout_height="fill_parent"
++++++++android:text="i+am+empty"/>
</LinearLayout>|2004515|entityMap^0|C|C|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

Activity code, its important to extend <code>ListActivity</code>.

<pre><code>package com.example.mylistactivity;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import com.example.mylistactivity.R;

// It's important to extend ListActivity rather than Activity
public class MyListActivity extends ListActivity {

 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.mylist);

 // shows list view
 String[] values = new String[] { "foo", "bar" };

 // shows empty view
 values = new String[] { };

 setListAdapter(new ArrayAdapter&lt;String&gt;(
 this,
 android.R.layout.simple_list_item_1,
 android.R.id.text1,
 values));
 }
}
</code></pre>

Layout xml, the id in both views are important.

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"&gt;

 &lt;!-- the android:id is important --&gt;
 &lt;ListView
 android:id="@android:id/list"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"/&gt;

 &lt;!-- the android:id is important --&gt;
 &lt;TextView
 android:id="@android:id/empty"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:text="i am empty"/&gt;
&lt;/LinearLayout&gt;
</code></pre>

blocks|key|2004597|text|<ListView+android:id="@%2Bid/listView"+...+/>
<TextView+android:id="@%2Bid/empty"+...+/>
and+in+the+linked+Activity:

this.listView+=+(ListView)+findViewById(R.id.listView);
this.listView.setEmptyView(findViewById(R.id.empty));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2004598|如果你使用的是支持库，这对于FragmentActivity来说是非常有效的。通过构建API+17，即4.2.2映像，测试了这一点。|unstyled|2004599|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>&lt;ListView android:id="@+id/listView" ... /&gt;
&lt;TextView android:id="@+id/empty" ... /&gt;
and in the linked Activity:

this.listView = (ListView) findViewById(R.id.listView);
this.listView.setEmptyView(findViewById(R.id.empty));
</code></pre>

This works clearly with FragmentActivity if you are using the support library. Tested this by building for API 17 i.e. 4.2.2 image.

blocks|key|1790952|text|我强烈建议您像这样使用ViewStubs|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1790953|<FrameLayout
++++android:layout_width="fill_parent"
++++android:layout_height="0dp"
++++android:layout_weight="1"+>

++++<ListView
++++++++android:id="@android:id/list"
++++++++android:layout_width="fill_parent"
++++++++android:layout_height="fill_parent"+/>

++++<ViewStub
++++++++android:id="@android:id/empty"
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:layout_gravity="center"
++++++++android:layout="@layout/empty"+/>
</FrameLayout>|code-block|syntax|javascript|1790954|​|1790955|查看来自Cyril+Mottier的完整示例|offset|length|1790956|entityMap|0|LINK|mutability|MUTABLE|url|http://cyrilmottier.com/2011/06/20/listview-tips-tricks-1-handle-emptiness/^0|0|0|0|4|D|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

I highly recommend you to use ViewStubs like this 




<pre><code>&lt;FrameLayout
 android:layout_width="fill_parent"
 android:layout_height="0dp"
 android:layout_weight="1" &gt;

 &lt;ListView
 android:id="@android:id/list"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent" /&gt;

 &lt;ViewStub
 android:id="@android:id/empty"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="center"
 android:layout="@layout/empty" /&gt;
&lt;/FrameLayout&gt;
</code></pre>



See the full example from <a href="http://cyrilmottier.com/2011/06/20/listview-tips-tricks-1-handle-emptiness/">Cyril Mottier</a>

blocks|key|1790982|text|首先检查列表是否包含一些值：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1790983|if+(list.isEmpty())+{
++++listview.setVisibility(View.GONE);
}|code-block|syntax|javascript|1790984|如果可以，则使用以下命令：|1790985|else+{
+++++listview.setVisibility(View.VISIBLE);
}|1790986|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

First check the list contains some values:

<pre><code>if (list.isEmpty()) {
 listview.setVisibility(View.GONE);
}
</code></pre>

If it is then OK, otherwise use:

<pre><code>else {
 listview.setVisibility(View.VISIBLE);
}
</code></pre>

blocks|key|1791043|text|只是补充一下，你并不真的需要创建新的ID，下面这样的代码就可以了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1791044|在布局中：|1791045|<ListView
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:id="@android:id/list"/>

<TextView
++++android:layout_width="match_parent"
++++android:layout_height="wrap_content"
++++android:id="@android:id/empty"
++++android:text="Empty"/>|code-block|syntax|javascript|1791046|然后在练习中：|1791047|++++ListView+listView+=+(ListView)+findViewById(android.R.id.list);
++++listView.setEmptyView(findViewById(android.R.id.empty));|1791048|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Just to add that you don't really need to create new IDs, something like the following will work.

In the layout:

<pre><code>&lt;ListView
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:id="@android:id/list"/&gt;

&lt;TextView
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:id="@android:id/empty"
 android:text="Empty"/&gt;
</code></pre>

Then in the activity:

<pre><code> ListView listView = (ListView) findViewById(android.R.id.list);
 listView.setEmptyView(findViewById(android.R.id.empty));
</code></pre>

blocks|key|2004718|text|一个程序化的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2004719|TextView+textView+=+new+TextView(context);
textView.setId(android.R.id.empty);
textView.setLayoutParams(new+ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,+ViewGroup.LayoutParams.WRAP_CONTENT));
textView.setText("No+result+found");
listView.setEmptyView(textView);|code-block|syntax|javascript|2004720|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A programmatically solution will be:

<pre><code>TextView textView = new TextView(context);
textView.setId(android.R.id.empty);
textView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
textView.setText("No result found");
listView.setEmptyView(textView);
</code></pre>

For some reason the empty view, a TextView in this case, always appears even when the ListView is not empty. I thought the ListView would automatically detect when to show the empty view.

<pre><code>&lt;RelativeLayout android:id="@+id/LinearLayoutAR"
 android:layout_height="fill_parent"
 android:layout_width="fill_parent"&gt;
 &lt;ListView android:id="@+id/ARListView"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"&gt;&lt;/ListView&gt;
 &lt;ProgressBar android:id="@+id/arProgressBar"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_centerVertical="true"&gt;&lt;/ProgressBar&gt;
 &lt;!-- Here is the view to show if the list is emtpy --&gt;
 &lt;TextView android:id="@id/android:empty"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:text="No Results" /&gt;
&lt;/RelativeLayout&gt;
</code></pre>

How can I hook up the empty view properly?

Showing empty view when ListView is empty

由于某些原因，即使ListView不为空，空视图(在本例中为TextView )也会始终出现。我认为ListView会自动检测何时显示空视图。<RelativeLayout android:id="@+id/LinearLayoutAR" android:layout_height="fill_parent" ...

问当ListView为空时显示空视图
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