android:spinnerMode="dialog"

Example of Android Spinner without and with android:spinnerMode="dialog":

Normal Spinner without android:spinnerMode="dialog"

Spinner with android:spinnerMode="dialog"

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android-coding.blogspot.com"
        android:textColor="#A00000"
        android:textStyle="bold|italic" />

    <Spinner
        android:id="@+id/myspinner1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
    <Spinner
        android:id="@+id/myspinner2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:spinnerMode="dialog" />

</LinearLayout>

package com.example.androidspinner;

import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.app.Activity;

public class MainActivity extends Activity {
 
 String[] dayOfWeek = {"Sunday", "Monday", "Tuesday",
   "Wednesday", "Thursday", "Friday", "Saturday"};

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

        Spinner MySpinner1 = (Spinner)findViewById(R.id.myspinner1);
  ArrayAdapter<String> myAdapter1 = new 
    ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, dayOfWeek);
        myAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        MySpinner1.setAdapter(myAdapter1);
        
        Spinner MySpinner2 = (Spinner)findViewById(R.id.myspinner2);
  ArrayAdapter<String> myAdapter2 = new 
    ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, dayOfWeek);
        myAdapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        MySpinner2.setAdapter(myAdapter2);
 }

}