Android Populating Spinner data from String Array

This is spinner dropdown tutorial which has static data . populate spinner data from String Array.

Place textview and spinner in your graphical layout of activity

  activity_spinnerdata.xml

 <RelativeLayout 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: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=".Spinnerdata" >

    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:prompt="@string/country_name"
        android:layout_marginTop="84dp" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="44dp"
        android:text="Country"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</RelativeLayout>

Define spinner used in activity by same id and arrayadapter for list the stored String in array

  final Spinner spinner = (Spinner) findViewById(R.id.spinner1);
  ArrayAdapter adapter = ArrayAdapter.createFromResource(
  this, R.array.countries, android.R.layout.simple_spinner_item);
  adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
  spinner.setAdapter(adapter);

 Spinnerdata.java

package com.pack.spinnerdata;

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

public class Spinnerdata extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_spinnerdata);
  
   //Write spinner and arrayAdapter for list the String stored in array 
  final Spinner spinner = (Spinner) findViewById(R.id.spinner1);
  ArrayAdapter adapter = ArrayAdapter.createFromResource(
  this, R.array.countries, android.R.layout.simple_spinner_item);
  adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
  spinner.setAdapter(adapter);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.spinnerdata, menu);
  return true;
 }

}

To add String array goto ->(your project)->res->values->String.xml Add String array in String.xml Now here i added a String array "countries"

String.xml 

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Spinnerdata</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>
 
    <string name="country_name">Choose a country</string>
      <string-array name="countries">
        <item>India</item>
        <item>London</item>
        <item>USA</item>
        <item>Burma</item>
        <item>China</item>
        <item>Malaysia</item>
        <item>singapore</item>
        <item>Italy</item>
        <item>Russia</item>
    </string-array>
    
</resources>