Working with two spinners

Introduction 

This article explains how to create a Spinner in Android. A Spinner is similar to a drop down list. It provides a quick way to select a value from a list. It displays the current selected value and touching the spinner gives a drop down list from which we can choose the required value.

demo

                                            

Using the code

activity_main.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=".MainActivity" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginLeft="54dp"

        android:layout_marginTop="52dp"

        android:text="Select country and city" />

    <Spinner

        android:id="@+id/spinner1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_below="@+id/textView1"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="63dp" />

    <Spinner

        android:id="@+id/spinner2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/spinner1"

        android:layout_below="@+id/spinner1"

        android:layout_marginTop="50dp" />

</RelativeLayout>

MainActivity.java:

package com.example.spinner;

import android.os.Bundle;

import android.app.Activity;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

public class MainActivity extends Activity implements OnItemSelectedListener {

Spinner sp1,sp2;

int pos;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

sp1=(Spinner)findViewById(R.id.spinner1);

sp2=(Spinner)findViewById(R.id.spinner2);

 ArrayAdapter<CharSequence> adapte = ArrayAdapter.createFromResource(this, R.array.country_array, android.R.layout.simple_spinner_item);

        sp1.setAdapter(adapte);

sp1.setOnItemSelectedListener(this);

        }

 @Override

public void onItemSelected(AdapterView<?> parent, View arg1, int pos,long arg3) {

                // TODO Auto-generated method stub

  if(pos==0)

{

 ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.city_select, android.R.layout.simple_spinner_item);

 sp2.setAdapter(adapter);

}

if(pos==1)

{

 ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.city_india, android.R.layout.simple_spinner_item);

    sp2.setAdapter(adapter);

}

 

else if (pos == 2) {

   ArrayAdapter<CharSequence> adapter = ArrayAdapter

     .createFromResource(this, R.array.city_pakisthan,

       android.R.layout.simple_spinner_item);

   sp2.setAdapter(adapter);

  } 

                                   else if (pos == 3) {

ArrayAdapter<CharSequence> adapter = ArrayAdapter

     .createFromResource(this, R.array.city_srilanka,

       android.R.layout.simple_spinner_item);

   sp2.setAdapter(adapter);

  }

}

@Override

public void onNothingSelected(AdapterView<?> arg0) {

// TODO Auto-generated method stub

}

}

Download full source code