blocks|key|1468044|text|spinner1.setOnItemSelectedListener(
++++new+AdapterView.OnItemSelectedListener()+{
++++++++//add+some+code+here
++++}
);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1468045|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>spinner1.setOnItemSelectedListener(
 new AdapterView.OnItemSelectedListener() {
 //add some code here
 }
);
</code></pre>

blocks|key|1468092|text|我认为最好的方法是在onCreate()中拥有一个flagitemselected+=+0;。且在项选择事件上，增加该标志，即flagitemselected%2B%2B；，然后检查|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1468093|if(flagitemselected!=1)
{
//+do+your+work+here
}|code-block|syntax|javascript|1468094|我想这会有帮助的。|1468095|entityMap^0|A|A|P|L|1R|I|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

The best way what I think would be to have an <code>flagitemselected = 0;</code> in <code>onCreate()</code>. And on item selected event increment that flag i.e <code>flagitemselected++</code>; and then check 

<pre><code>if(flagitemselected!=1)
{
// do your work here
}
</code></pre>

This will help I guess.

blocks|key|1253369|text|我发现的一个窍门是把你的setOnItemSelectedListeners放入onWindowFocusChanged而不是onCreate。到目前为止，我还没有发现这样做有任何不良的副作用。基本上，在窗口绘制后设置侦听器。我不确定onWindowFocusChanged多长时间运行一次，但是如果您发现它运行得太频繁，那么创建一个锁变量是很容易的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1253370|我认为Android可能正在使用基于消息的处理系统，如果您将其全部放在onCreate中，您可能会遇到微调控件在绘制后被填充的情况。因此，您的侦听器将在您设置项目位置后触发。当然，这是一个有根据的猜测，但请随时纠正我的错误。|1253371|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

One trick I found was putting your setOnItemSelectedListeners in onWindowFocusChanged instead of onCreate. I haven't found any bad side-effects to doing it this way, yet. Basically, set up the listeners after the window gets drawn. I'm not sure how often onWindowFocusChanged runs, but it's easy enough to create yourself a lock variable if you are finding it running too often.

I think Android might be using a message-based processing system, and if you put it all in onCreate, you may run into situations where the spinner gets populated after it gets drawn. So, your listener will fire off after you set the item location. This is an educated guess, of course, but feel free to correct me on this.

blocks|key|1468196|text|找到您的微调器名称和id，然后实现此方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1468197|spinnername.setOnItemSelectedListener(new+OnItemSelectedListener()+{

++++@Override
++++public+void+onItemSelected(AdapterView<?>+parentView,+View+selectedItemView,+int+position,+long+id)+{
++++++++//+your+code+here
++++}

++++@Override
++++public+void+onNothingSelected(AdapterView<?>+parentView)+{
++++++++//+your+code+here
++++}
});|code-block|syntax|javascript|1468198|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|$]]

Find your spinner name and find id then implement this method.

<pre><code>spinnername.setOnItemSelectedListener(new OnItemSelectedListener() {

 @Override
 public void onItemSelected(AdapterView&lt;?&gt; parentView, View selectedItemView, int position, long id) {
 // your code here
 }

 @Override
 public void onNothingSelected(AdapterView&lt;?&gt; parentView) {
 // your code here
 }
});
</code></pre>

blocks|key|1253482|text|您可以在您的活动中实现AdapterView.OnItemSelectedListener类。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1253483|然后在onCreate()中使用下面这一行|1253484|Spinner+spin+=+(Spinner)+findViewById(R.id.spinner);
spin.setOnItemSelectedListener(this);|code-block|syntax|javascript|1253485|然后覆盖这两个方法：|1253486|public+void+onItemSelected(AdapterView<?>+parent,+View+v,+int+position,+long+id)+{
++++selection.setText(items[position]);
}

public+void+onNothingSelected(AdapterView<?>+parent)+{
++++selection.setText("");
}|1253487|entityMap^0|B|Y|0|3|A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|Z|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

You can implement <code>AdapterView.OnItemSelectedListener</code> class in your Activity.

And then use the below line within <code>onCreate()</code>

<pre><code>Spinner spin = (Spinner) findViewById(R.id.spinner);
spin.setOnItemSelectedListener(this);
</code></pre>

Then override these two methods:

<pre><code>public void onItemSelected(AdapterView&lt;?&gt; parent, View v, int position, long id) {
 selection.setText(items[position]);
}

public void onNothingSelected(AdapterView&lt;?&gt; parent) {
 selection.setText("");
}
</code></pre>

blocks|key|1468261|text|spinner.setOnItemSelectedListener(
++++++++++++new+AdapterView.OnItemSelectedListener()+{

++++++++++++++++@Override
++++++++++++++++public+void+onItemSelected(AdapterView<?>+arg0,+View+arg1,
++++++++++++++++++++++++int+arg2,+long+arg3)+{

++++++++++++++++++++//+TODO+Auto-generated+method+stub
++++++++++++++++}

++++++++++++++++@Override
++++++++++++++++public+void+onNothingSelected(AdapterView<?>+arg0)+{
++++++++++++++++++++//+TODO+Auto-generated+method+stub

++++++++++++++++}
++++++++++++++++//add+some+code+here
++++++++++++}
++++++++);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1468262|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>spinner.setOnItemSelectedListener(
 new AdapterView.OnItemSelectedListener() {

 @Override
 public void onItemSelected(AdapterView&lt;?&gt; arg0, View arg1,
 int arg2, long arg3) {

 // TODO Auto-generated method stub
 }

 @Override
 public void onNothingSelected(AdapterView&lt;?&gt; arg0) {
 // TODO Auto-generated method stub

 }
 //add some code here
 }
 );
</code></pre>

blocks|key|1468334|text|获取当前微调器选择的全局变量：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1468335|int+currentItem+=+0;

spinner_counter+=+(Spinner)findViewById(R.id.spinner_counter);
String[]+value={"20","40","60","80","100","All"};
aa=new+ArrayAdapter<String>(this,R.layout.spinner_item_profile,value);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner_counter.setAdapter(aa);

spinner_counter.setOnItemSelectedListener(new+AdapterView.OnItemSelectedListener()+{
++++++++@Override
++++++++public+void+onItemSelected(AdapterView<?>+parent,+View+view,+int+position,+long+id)+{
++++++++++++if(currentItem+==+position){
++++++++++++++++return;+//do+nothing
++++++++++++}
++++++++++++else
++++++++++++{
+++++++++++++++++TextView+spinner_item_text+=+(TextView)+view;
+++++++++++++++++//write+your+code+here
++++++++++++}
++++++++++++currentItem+=+position;
++++++++}

++++++++@Override
++++++++public+void+onNothingSelected(AdapterView<?>+parent)+{

++++++++}
++++});

//R.layout.spinner_item_profile
<?xml+version="1.0"+encoding="utf-8"?>

<TextView++android:id="@%2Bid/spinner_item_text"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"+
android:layout_height="wrap_content"
android:background="@drawable/border_close_profile"
android:gravity="start"++
android:textColor="@color/black"+++++++++
android:paddingLeft="5dip"
android:paddingStart="5dip"
android:paddingTop="12dip"
android:paddingBottom="12dip"
/>

//drawable/border_close_profile
<?xml+version="1.0"+encoding="utf-8"?>
<layer-list+xmlns:android="http://schemas.android.com/apk/res/android">
++<item>
+++<shape+android:shape="rectangle">
++++<solid+android:color="#e2e3d7"+/>
+++</shape>
+</item>
<item+android:left="1dp"
android:right="1dp"
android:top="1dp"
android:bottom="1dp">
<shape+android:shape="rectangle">
++++<solid+android:color="@color/white_text"+/>
</shape>
</item>
</layer-list>|code-block|syntax|javascript|1468336|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|$]]

take a global variable for current selection of spinner:

<pre><code>int currentItem = 0;

spinner_counter = (Spinner)findViewById(R.id.spinner_counter);
String[] value={"20","40","60","80","100","All"};
aa=new ArrayAdapter&lt;String&gt;(this,R.layout.spinner_item_profile,value);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner_counter.setAdapter(aa);

spinner_counter.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
 @Override
 public void onItemSelected(AdapterView&lt;?&gt; parent, View view, int position, long id) {
 if(currentItem == position){
 return; //do nothing
 }
 else
 {
 TextView spinner_item_text = (TextView) view;
 //write your code here
 }
 currentItem = position;
 }

 @Override
 public void onNothingSelected(AdapterView&lt;?&gt; parent) {

 }
 });

//R.layout.spinner_item_profile
&lt;?xml version="1.0" encoding="utf-8"?&gt;

&lt;TextView android:id="@+id/spinner_item_text"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" 
android:layout_height="wrap_content"
android:background="@drawable/border_close_profile"
android:gravity="start" 
android:textColor="@color/black" 
android:paddingLeft="5dip"
android:paddingStart="5dip"
android:paddingTop="12dip"
android:paddingBottom="12dip"
/&gt;

//drawable/border_close_profile
&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android"&gt;
 &lt;item&gt;
 &lt;shape android:shape="rectangle"&gt;
 &lt;solid android:color="#e2e3d7" /&gt;
 &lt;/shape&gt;
 &lt;/item&gt;
&lt;item android:left="1dp"
android:right="1dp"
android:top="1dp"
android:bottom="1dp"&gt;
&lt;shape android:shape="rectangle"&gt;
 &lt;solid android:color="@color/white_text" /&gt;
&lt;/shape&gt;
&lt;/item&gt;
&lt;/layer-list&gt;
</code></pre>

blocks|key|1468390|text|在onCreate或onStart中设置OnItemSelectedListener都无关紧要-在Activity创建或启动期间(分别)仍然会调用它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1468391|所以我们可以在onCreate+(而不是onStart!)中设置它。|1468392|只需添加一个标志来确定第一次初始化：|1468393|private+Spinner+mSpinner;
private+boolean+mSpinnerInitialized;|code-block|syntax|javascript|1468394|然后在onCreate+(或onCreateView)中只需：|1468395|mSpinner.setOnItemSelectedListener(new+AdapterView.OnItemSelectedListener()+{
++++++++++++public+void+onItemSelected(AdapterView<?>+adapterView,+View+view,+int+i,+long+l)+{
++++++++++++++++if+(!mSpinnerInitialized)+{
++++++++++++++++++++mSpinnerInitialized+=+true;
++++++++++++++++++++return;
++++++++++++++++}

++++++++++++++++//+do+stuff
++++++++++++}

++++++++++++public+void+onNothingSelected(AdapterView<?>+adapterView)+{
++++++++++++++++return;
++++++++++++}
++++++++});|1468396|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

It doesn't matter will you set OnItemSelectedListener in onCreate or onStart - it will still be called during of Activity creation or start (respectively). 
So we can set it in onCreate (and NOT in onStart!). 
Just add a flag to figure out first initialisation:

<pre><code>private Spinner mSpinner;
private boolean mSpinnerInitialized;
</code></pre>

then in onCreate (or onCreateView) just:

<pre><code>mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
 public void onItemSelected(AdapterView&lt;?&gt; adapterView, View view, int i, long l) {
 if (!mSpinnerInitialized) {
 mSpinnerInitialized = true;
 return;
 }

 // do stuff
 }

 public void onNothingSelected(AdapterView&lt;?&gt; adapterView) {
 return;
 }
 });
</code></pre>

blocks|key|1253717|text|这将起作用初始化微调器和findviewbyid，并使用它将起作用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1253718|++++Spinner+schemeStatusSpinner;

++schemeStatusSpinner+=+(Spinner)+dialog.findViewById(R.id.spinner);

schemeStatusSpinner.setOnItemSelectedListener(new+AdapterView.OnItemSelectedListener()+{
++++++++@Override
++++++++public+void+onItemSelected(AdapterView<?>+parentView,+View+selectedItemView,+int+position,+long+id)+{
++++++++++++//+your+code+here
++++++++++++if(schemeStatusSpinner.getSelectedItemId()==4){
++++++++++++++++reasonll.setVisibility(View.VISIBLE);
++++++++++++}
++++++++++++else+{
++++++++++++++++reasonll.setVisibility(View.GONE);
++++++++++++}
++++++++}

++++++++@Override
++++++++public+void+onNothingSelected(AdapterView<?>+parentView)+{
++++++++++++//+your+code+here
++++++++}

++++});|code-block|syntax|javascript|1253719|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|$]]

This will work
intialize the spinner and findviewbyid and use this it will work 

<pre><code> Spinner schemeStatusSpinner;

 schemeStatusSpinner = (Spinner) dialog.findViewById(R.id.spinner);

schemeStatusSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
 @Override
 public void onItemSelected(AdapterView&lt;?&gt; parentView, View selectedItemView, int position, long id) {
 // your code here
 if(schemeStatusSpinner.getSelectedItemId()==4){
 reasonll.setVisibility(View.VISIBLE);
 }
 else {
 reasonll.setVisibility(View.GONE);
 }
 }

 @Override
 public void onNothingSelected(AdapterView&lt;?&gt; parentView) {
 // your code here
 }

 });
</code></pre>

blocks|key|1468535|text|默认情况下，您将通过|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1468536|value+=+spinner.getSelectedItem().toString();|code-block|syntax|javascript|1468537|只要在微调器中选择了该值，就会得到选定的值|1468538|如果您想要选定项的位置，请这样做|1468539|pos+=+spinner.getSelectedItemPosition();|1468540|以上两个答案是在不应用listener的情况下形成的|1468541|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]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

By default, you will get the first item of the spinner array through

<pre><code>value = spinner.getSelectedItem().toString();
</code></pre>

whenever you selected the value in the spinner this will give you the selected value

if you want the position of the selected item then do it like that

<pre><code>pos = spinner.getSelectedItemPosition();
</code></pre>

the above two answers are for without applying listener

blocks|key|1253835|text|对于kotlin，您可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1253836|spinner.onItemSelectedListener+=++object+:+AdapterView.OnItemSelectedListener+{
++++override+fun+onItemSelected(parent:+AdapterView<*>?,+view:+View?,+position:+Int,+id:+Long)+{
++++++++
++++}

++++override+fun+onNothingSelected(p0:+AdapterView<*>?)+{
++++++++
++++}
}|code-block|syntax|javascript|1253837|注意:对于onItemSelected方法的参数，我使用自定义变量名|offset|length|style|CODE|1253838|entityMap^0|0|0|5|E|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]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

For kotlin you can use:
<pre><code>spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
 override fun onItemSelected(parent: AdapterView&lt;*&gt;?, view: View?, position: Int, id: Long) {
 
 }

 override fun onNothingSelected(p0: AdapterView&lt;*&gt;?) {
 
 }
}
</code></pre>
Note: for parameters of <code>onItemSelected</code> method I use custom variable names

blocks|key|1468654|text|我知道这个问题已经解决很久了，但是我在字符串数组的顶部有一个“请选择”字符串。然后，当您编写侦听器时|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1468655|yourspinner.onItemSelectedListener+=+object+:+OnItemSelectedListener+{
++++++++++++override+fun+onItemSelected(adapterView:+AdapterView<*>?,+view:+View,+i:+Int,+l:+Long)+{
++++++++++++++++yourvalue+=+yourspinner.getSelectedItem().toString()

++++++++++++++++when(yourvalue){
++++++++++++++++++++"Please+Select"+->+//+DO+nothing
++++++++++++++++++++else+->+//+Do+something
++++++++++++++++}
++++++++++++}

++++++++++++override+fun+onNothingSelected(adapterView:+AdapterView<*>?)+{
++++++++++++++++return
++++++++++++}
++++++++}|code-block|syntax|javascript|1468656|当然，您可以扩展when语句，使其具有不同的响应或操作。|1468657|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 know this was long solved but I have a &quot;Please select&quot; string at the top of my string arrays. Then when you write the listener
<pre><code>yourspinner.onItemSelectedListener = object : OnItemSelectedListener {
 override fun onItemSelected(adapterView: AdapterView&lt;*&gt;?, view: View, i: Int, l: Long) {
 yourvalue = yourspinner.getSelectedItem().toString()

 when(yourvalue){
 &quot;Please Select&quot; -&gt; // DO nothing
 else -&gt; // Do something
 }
 }

 override fun onNothingSelected(adapterView: AdapterView&lt;*&gt;?) {
 return
 }
 }
</code></pre>
You can of course extend the when statement to have different responses or actions.

How can you set the event listener for a Spinner when the selected item changes?

Basically what I am trying to do is something similar to this:

<pre><code>spinner1.onSelectionChange = handleSelectionChange;

void handleSelectionChange(Object sender){
 //handle event
}
</code></pre>

Android Spinner: Get the selected item change event

Android

当选定项发生更改时，如何设置微调器的事件侦听器？基本上，我正在尝试做的事情与以下内容类似：spinner1.onSelectionChange = handleSelectionChange;void handleSelectionChange(Object sender){    //handle event}

问Android微调:获取selected item change事件
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