Android Spinner

Spinner allows you to select an item from a drop down menu.

For example. When you are using Gmail application you would get drop down menu as shown below, you need to select an item from a drop down menu.

Example
This example demonstrates the category of computer courses, you need to select a category from the category.
Steps :

1. Define all courses in res/values/strings.xml

   <string-array name = "course_items">
           <item>C</item>
           <item>C++</item>
           <item>Java</item>
           <item>.Net</item>
           <item>MySql</item>
   </string-array>
   

2. Add Spinner in res/layout/activity_main.xml

   <?xml version="1.0" encoding="utf-8"?>
   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:orientation="vertical" >
   
       <Spinner
           android:id="@+id/sp_courses"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:entries="@array/course_items"
   />
   
       <Button
           android:id="@+id/btn_submit"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:text="Submit" />
   
   </LinearLayout>
   

   android:entries represents the selection items in spinner.
3. Add code in src/your app package/MainActivity.java

   package com.example.androidcollegeppt;
   
   import android.app.Activity;
   import android.os.Bundle;
   import android.view.View;
   import android.view.View.OnClickListener;
   import android.widget.Button;
   import android.widget.Spinner;
   import android.widget.Toast;
   
   public class Spinner_Demo extends Activity {
   	Spinner sp_courses;
   	Button btn_submit;
   	@Override
   	protected void onCreate(Bundle savedInstanceState) {
   		super.onCreate(savedInstanceState);
   		setContentView(R.layout.a_spinner_demo);
   		sp_courses = (Spinner) findViewById(R.id.sp_courses);
   		btn_submit = (Button) findViewById(R.id.btn_submit);
   		btn_submit.setOnClickListener(new OnClickListener() {	
   			@Override
   			public void onClick(View v) {
   
   			Toast.makeText(getBaseContext(), sp_courses.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
   
   			}
   		});
   
   	}
   }
   

OUT PUT