title: Show spinner in AlertDialog
body: <p>I want to show a spinner in my alertDialog. I have the following code but it just give me a black screen. Logcat doesn't say any errors.</p>
  
  <p><strong>MyActivity.java</strong></p>
  
  <pre><code>AlertDialog.Builder builder;
  AlertDialog alertDialog;
  
  Context mContext = getApplicationContext();
  LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
  View layout = inflater.inflate(R.layout.spinner,null);
  
  String array_spinner[];
  array_spinner=new String[5];
  
  array_spinner[0]="US";
  array_spinner[1]="Japan";
  array_spinner[2]="China";
  array_spinner[3]="India";
  array_spinner[4]="Vietnam";
  
  Spinner s = (Spinner) layout.findViewById(R.id.Spinner01);
  
  ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_spinner_item, array_spinner);
  
  s.setAdapter(adapter);
  
  builder = new AlertDialog.Builder(mContext);
  builder.setView(layout);
  alertDialog = builder.create();
  </code></pre>
  
  <p><strong>Main.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical" &gt;
      &lt;TextView
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:text="@string/hello" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p><strong>Spinner.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical" &gt;
      &lt;Spinner
          android:id="@+id/Spinner01"
          android:layout_width="match_parent"
          android:layout_height="wrap_content" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>I'm really new here, thanks a lot for any help! :)</p>
  
  <p><strong>edit:</strong> when I added alertDialog.show(); it force closes, logcat says:</p>
  
  <pre><code>11-18 18:14:09.886: D/AndroidRuntime(21856): Shutting down VM
  11-18 18:14:09.886: W/dalvikvm(21856): threadid=1: thread exiting with uncaught exception (group=0x401b8888)
  11-18 18:14:09.909: E/AndroidRuntime(21856): FATAL EXCEPTION: main
  11-18 18:14:09.909: E/AndroidRuntime(21856): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.SpinnerExample/com.example.SpinnerExample.SpinnerExampleActivity}: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2668)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2684)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.ActivityThread.access$2300(ActivityThread.java:126)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2038)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.os.Handler.dispatchMessage(Handler.java:99)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.os.Looper.loop(Looper.java:123)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.ActivityThread.main(ActivityThread.java:4632)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at java.lang.reflect.Method.invokeNative(Native Method)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at java.lang.reflect.Method.invoke(Method.java:521)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at dalvik.system.NativeStart.main(Native Method)
  11-18 18:14:09.909: E/AndroidRuntime(21856): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.view.ViewRoot.setView(ViewRoot.java:509)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:207)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:121)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.Dialog.show(Dialog.java:259)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at com.example.SpinnerExample.SpinnerExampleActivity.onCreate(SpinnerExampleActivity.java:45)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2632)
  11-18 18:14:09.909: E/AndroidRuntime(21856):    ... 11 more
  </code></pre>