blocks|key|1235554|text|也许你需要使用function：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1235555|ListView.setItemChecked(int+position,+boolean+checked);|code-block|syntax|javascript|1235556|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|$]]

maybe you need to use function:

<pre><code>ListView.setItemChecked(int position, boolean checked);
</code></pre>

blocks|key|1235526|text|在调用setSelection()方法之前使用requestFocusFromTouch()|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1235527|entityMap^0|3|E|N|N|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

use <code>requestFocusFromTouch()</code> before calling <code>setSelection()</code> method

blocks|key|1450560|text|我知道这是一个老问题，但我刚刚遇到了一个类似的问题，我用这种方法解决了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450561|mListView.clearFocus();
mListView.post(new+Runnable()+{
++++@Override
++++public+void+run()+{
++++++++mListView.setSelection(index);
++++}
});|code-block|syntax|javascript|1450562|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|$]]

I know this is an old question but I just had a similar problem that I solved in this way:

<pre><code>mListView.clearFocus();
mListView.post(new Runnable() {
 @Override
 public void run() {
 mListView.setSelection(index);
 }
});
</code></pre>

blocks|key|1450255|text|您可能需要将setSelection()包装在posted+Runnable+(reference)中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1450256|entityMap|0|LINK|mutability|MUTABLE|url|http://groups.google.com/group/android-developers/browse_thread/thread/127ca57414035301#msg_27db6f1b808e1506^0|6|E|N|4|U|8|14|9|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]]|E|$]]|$1|F|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

You might need to wrap <code>setSelection()</code> in a <code>post</code>ed <code>Runnable</code> (<a href="http://groups.google.com/group/android-developers/browse_thread/thread/127ca57414035301#msg_27db6f1b808e1506" rel="noreferrer">reference</a>).

blocks|key|1450189|text|setSelection()不一定有视觉上的影响。只有使用D键盘/轨迹球在列表中导航时，才会出现选择栏。如果您在屏幕上轻触以单击某项内容，选择栏将短暂出现并消失。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1450190|因此，只有当活动未处于触摸模式时，setSelection()才会产生视觉影响(即，用户所做的最后一件事是使用D键盘/跟踪球)。|1450191|根据你提供的描述，我不能100%25确定这可以解释你的现象，但我认为值得一试……|1450192|entityMap^0|0|E|0|H|E|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

<code>setSelection()</code> does not necessarily have visual impact. The selection bar only appears if you use the D-pad/trackball to navigate the list. If you tap on the screen to click something, the selection bar appears briefly and vanishes.

Hence, <code>setSelection()</code> will only have a visual impact if the activity is not in touch mode (i.e., the last thing the user did was use the D-pad/trackball).

I am not 100% certain this explains your phenomenon given the description you provided, but I figured it is worth a shot...

blocks|key|1235598|text|如果您的ListView使用适配器，请将以下代码添加到您的适配器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1235599|public+class+MyAdapter+extends
++++++++ArrayAdapter<MyClass>+{


++++@Override
++++public+View+getView(int+position,+View+convertView,+ViewGroup+parent)+{
++++++++if+(convertView+==+null)+{
++++++++++++LayoutInflater+inflator+=+(LayoutInflater)+getContext()
++++++++++++++++++++.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
++++++++++++rowView+=+inflator.inflate(R.layout.my_adapter,+null);
++++++++}+else+{
++++++++++++rowView+=+(View)+convertView;
++++++++}

++++++++//...

++++++++//+set+selected+item
++++++++LinearLayout+ActiveItem+=+(LinearLayout)+rowView;
++++++++if+(position+==+selectedItem)
++++++++{
++++++++++++ActiveItem
++++++++++++++++++++.setBackgroundResource(R.drawable.background_dark_blue);

++++++++++++//+for+focus+on+it
++++++++++++int+top+=+(ActiveItem+==+null)+?+0+:+ActiveItem.getTop();
++++++++++++((ListView)+parent).setSelectionFromTop(position,+top);
++++++++}
++++++++else
++++++++{
++++++++++++ActiveItem
++++++++++++++++++++.setBackgroundResource(R.drawable.border02);
++++++++}

++++}

++++private+int+selectedItem;

++++public+void+setSelectedItem(int+position)+{
++++++++selectedItem+=+position;
++++}

}|code-block|syntax|javascript|1235600|在您的活动中：|1235601|myAdapter.setSelectedItem(1);|1235602|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|$]]

If you use an Adapter for your ListView add this code to your adapter:

<pre><code>public class MyAdapter extends
 ArrayAdapter&lt;MyClass&gt; {


 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
 if (convertView == null) {
 LayoutInflater inflator = (LayoutInflater) getContext()
 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 rowView = inflator.inflate(R.layout.my_adapter, null);
 } else {
 rowView = (View) convertView;
 }

 //...

 // set selected item
 LinearLayout ActiveItem = (LinearLayout) rowView;
 if (position == selectedItem)
 {
 ActiveItem
 .setBackgroundResource(R.drawable.background_dark_blue);

 // for focus on it
 int top = (ActiveItem == null) ? 0 : ActiveItem.getTop();
 ((ListView) parent).setSelectionFromTop(position, top);
 }
 else
 {
 ActiveItem
 .setBackgroundResource(R.drawable.border02);
 }

 }

 private int selectedItem;

 public void setSelectedItem(int position) {
 selectedItem = position;
 }

}
</code></pre>

In your Activity:

<pre><code>myAdapter.setSelectedItem(1);
</code></pre>

blocks|key|1235914|text|给我打个电话|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1235915|listView.notifyDataSetChanged();
listView.requestFocusFromTouch();|code-block|syntax|javascript|1235916|然后|1235917|+listView.setSelection(position);|1235918|解决了问题。|1235919|如果你在runnable中这样做，它不需要调用requestFocusFromTouch()就可以工作，但是ListView的旧位置在sekound中显示出来。|1235920|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

For me calling

<pre><code>listView.notifyDataSetChanged();
listView.requestFocusFromTouch();
</code></pre>

and then

<pre><code> listView.setSelection(position);
</code></pre>

solved the issue.

if you do that in a runnable it works without calling requestFocusFromTouch(), but the old position of the ListView is showen for a sekound.

blocks|key|1450842|text|我有一个非常大的网页内容请求。当我在onCreateView中使用代码时，Listview甚至还没有完成加载。我把它放在我的AsyncTask的onPostExecute里。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450843|++++++++++++//Get+last+position+in+listview
++++++++if+(listView+!=+null+&&+scrollPosition+!=+0)+{
++++++++++++listView.clearFocus();
++++++++++++listView.requestFocusFromTouch();
++++++++++++listView.post(new+Runnable()+{
++++++++++++++++@Override
++++++++++++++++public+void+run()+{
++++++++++++++++++++listView.setItemChecked(scrollPosition,+true);
++++++++++++++++++++listView.setSelection(scrollPosition);
++++++++++++++++}
++++++++++++});
++++++++}|code-block|syntax|javascript|1450844|别忘了在点击时设置签入的项目;)|1450845|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|$]]

I have an very large Request with Webcontent. When I used the code in onCreateView the Listview wasnt even finished loading.
I put it in onPostExecute of my AsyncTask.

<pre><code> //Get last position in listview
 if (listView != null &amp;&amp; scrollPosition != 0) {
 listView.clearFocus();
 listView.requestFocusFromTouch();
 listView.post(new Runnable() {
 @Override
 public void run() {
 listView.setItemChecked(scrollPosition, true);
 listView.setSelection(scrollPosition);
 }
 });
 }
</code></pre>

Dont forget to set the item checked in on Click ;)

blocks|key|1235656|text|也许您应该使用ListView的smoothScrollToPosition(int+position)方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1235657|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Maybe you should use the smoothScrollToPosition(int position) method of ListView

blocks|key|1450984|text|您可以尝试以下两种方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450985|解决方案A：|1450986|++++mListView.post(new+Runnable()+{
++++++++@Override
++++++++public+void+run()+{
++++++++++++if+(null+!=+mListView)+{
++++++++++++++++mListView.clearFocus();
++++++++++++++++mListView.requestFocusFromTouch();
++++++++++++++++mListView.setSelection(0);
++++++++++++}
++++++++}
++++});|code-block|syntax|javascript|1450987|在一些复杂的情况下，这种解决方案会给Android+8.x带来一些新的问题。|1450988|此外，它可能会导致意外的onFocusChange()。|1450989|解决方案B:定义一个自定义视图扩展ListView。重写方法handleDataChanged().Then+setSelection(0)。在CustomListView中：|1450990|@Override
protected+void+handleDataChanged()+{
++++super.handleDataChanged();
++++if+(null+!=+mHandleDataChangedListener){
++++++++mHandleDataChangedListener.onChanged();
++++}
}
HandleDataChangedListener+mHandleDataChangedListener;

public+void+setHandleDataChangedListener(HandleDataChangedListener+handleDataChangedListener)+{
++++this.mHandleDataChangedListener+=+handleDataChangedListener;
}

public+interface+HandleDataChangedListener{
++++void+onChanged();
}|1450991|在活动中：|1450992|++++mListView.setHandleDataChangedListener(new+CustomListView.HandleDataChangedListener()+{
++++++++@Override
++++++++public+void+onChanged()+{
++++++++++++mListView.setHandleDataChangedListener(null);
++++++++++++mListView.setSelection(0);
++++++++}
++++});
++++mAdapter.notifyDataSetChanged();|1450993|好了，就这样吧。|1450994|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

You can try 2 ways like these: 
Solution A:

<pre><code> mListView.post(new Runnable() {
 @Override
 public void run() {
 if (null != mListView) {
 mListView.clearFocus();
 mListView.requestFocusFromTouch();
 mListView.setSelection(0);
 }
 }
 });
</code></pre>

In some complicated situation, this solution will bring some new problems in Android 8.x. Besides it may cause unexpected onFocusChange(). 

Solution B:
Define a custom view extends ListView. Override method handleDataChanged().Then setSelection(0). In CustomListView:

<pre><code>@Override
protected void handleDataChanged() {
 super.handleDataChanged();
 if (null != mHandleDataChangedListener){
 mHandleDataChangedListener.onChanged();
 }
}
HandleDataChangedListener mHandleDataChangedListener;

public void setHandleDataChangedListener(HandleDataChangedListener handleDataChangedListener) {
 this.mHandleDataChangedListener = handleDataChangedListener;
}

public interface HandleDataChangedListener{
 void onChanged();
}
</code></pre>

In activity: 

<pre><code> mListView.setHandleDataChangedListener(new CustomListView.HandleDataChangedListener() {
 @Override
 public void onChanged() {
 mListView.setHandleDataChangedListener(null);
 mListView.setSelection(0);
 }
 });
 mAdapter.notifyDataSetChanged();
</code></pre>

Ok, That's it.

blocks|key|1235725|text|在我的例子中，smoothScrollToPosition(整型位置)起作用了，你能告诉我如何将滚动位置设置到列表的中心吗？它出现在可见项目的底部。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1235726|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case smoothScrollToPosition(int position) worked, can you also tell me how to set that scrolled position into center of the list. It appeared at the bottom of visible items.

blocks|key|1450516|text|对我来说，它帮助我设置|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450517|ListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);或ListView.CHOICE_MODE_MULTIPLE|offset|length|style|CODE|1450518|然后|1450519|ListView.setSelection(position)或ListView.setItemChecked(position,+true);|1450520|工作正常|1450521|entityMap^0|0|0|1G|1H|T|0|0|0|V|W|14|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]|$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@$D|X|E|Y|F|G]|$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|O|$]]

For me it helped to set 
<code>ListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);</code> or <code>ListView.CHOICE_MODE_MULTIPLE</code> 
then 
<code>ListView.setSelection(position)</code> or <code>ListView.setItemChecked(position, true);</code> 
works fine

blocks|key|1450617|text|在我的案例中找到了解决方案。我没有使用Runnable，因为我的类在扩展ListFragment。我要做的是使我的索引成为最终的；最终的索引=+5；mListView.setSelection(索引)；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450618|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Found a solution in my case. I am not using a Runnable since my class is extending ListFragment. What I had to do is make my index a final;
final index = 5;
mListView.setSelection(index);

blocks|key|1450760|text|我发现有时候因为我把listView的“android:+setSelection”属性设置为"wrap_content“，所以高度不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450761|当listView从不可滚动变为可滚动时，我的应用程序将无法工作。|1450762|例如，如果我的应用程序是“文件浏览器应用程序”。如果我的列表小于6，那么它就是不可滚动的。现在我返回到父目录，它有11个对象，我想将选择设置为某个位置，但它在这里不起作用。|1450763|to\from++++%7C++++Scrollable++%7C+non-Scrollable|code-block|syntax|javascript|1450764|可滚动%7CO%7C+O(当然)|1450765|不可滚动%7CX%7C+O(当然)|1450766|我不想使用post(Runnable)，因为会有延迟。|1450767|==================================|1450768|答案：|1450769|您可以尝试将"android:height“设置为"match_parent”|1450770|天啊，它花了三天时间。|1450771|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|13|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|17|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|18|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|19|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|Z|$]]

I found that sometimes setSelection will not work because I set attribute "android:height" of listView to "wrap_content".

And the times my App won't work is that when listView become scrollable from non-scrollable.

For example, if my app is "File Browser App". When my list is less than, let's say 6, then it's non-scrollable. Now I return to the parent directory, and it has 11 objects, and I want to set selection to some position, and it won't work here.

<pre><code>to\from | Scrollable | non-Scrollable
</code></pre>

Scrollable | O | O( of course )

non-Scrollable | X | O( of course )

I don't want to use post(Runnable), because there will has delay.

==================================

Answer:

You can try to set "android:height" to "match_parent"

God, it spends three days.

blocks|key|1450921|text|只需尝试以下代码即可|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1450922|++listView.setAdapter(adapter);
++listView.setSelection(position);
++adapter.notifyDataSetChanged();+|code-block|syntax|javascript|1450923|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|$]]

Simply try this code

<pre><code> listView.setAdapter(adapter);
 listView.setSelection(position);
 adapter.notifyDataSetChanged(); 
</code></pre>

blocks|key|1236138|text|对我来说，这个问题的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1236139|listView.clearChoices();|code-block|syntax|javascript|1236140|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|$]]

For me the solution to this problem was:

<pre><code>listView.clearChoices();
</code></pre>

I have a <code>ListActivity</code> that implements <code>onListItemClick()</code> and calls a <code>doSomething()</code> function of the class. The latter contains <code>l.setSelection(position)</code> where <code>l</code> is the <code>ListView</code> object.

Now there is a <code>onClickListener()</code> listening for a button click that perfoms some actions and that too calls <code>doSomething()</code>.

In the first case, the selected item get positioned appropriately, but in the latter, nothing happens.

Any clues about this strange behaviour and how I might make it work?

Android ListView setSelection() does not seem to work

Android

我有一个实现onListItemClick()并调用该类的doSomething()函数的ListActivity。后者包含l.setSelection(position)，其中l是ListView对象。现在有一个监听按钮点击的onClickListener()，该按钮完成一些操作，也调用doSomething()。在第一种情况下，选定的项得到了适当的定位，但在后一种情况下，什么也没有发生。有没有

问安卓ListView setSelection()似乎不起作用
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回答 16

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问安卓ListView setSelection()似乎不起作用
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