Android Spinner Tutorial

            In this tutorial i am going to teach you how to you spinner drop down in the Android applications.It allows users to select items from the drop down menu.

STEP BY STEP

1.Create an Android Project

Refer:-How to create android project

2.Open string.xml file from the resource folder and add the following code showing bellow

strings.xml

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

<resources>

    <string name="app_name">AndroidSpinnerExample</string>

    <string name="spinner_title">Select Category</string>

</resources>

3.Then open main.xml and copy paste the bellow code.

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:padding="10dip"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content">

    <!-- Text Label -->

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="10dip"

        android:text="Select Mobile:"

        android:layout_marginBottom="5dp"

    />

    <!-- Spinner Element -->

    <Spinner

        android:id="@+id/spinner"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:prompt="@string/spinner_title"

    />

</LinearLayout>

4.Open main activity class file and extend it from OnItemSelectedListener

  public class SpinnerActivity extends Activity extends Activity   

  implements OnItemSelectedListener

5.After that copy and paste the bellow code in mainActivity file

  

package com.roney.spinner;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.Toast;

import android.widget.AdapterView.OnItemSelectedListener;

public class SpinnerActivity extends Activity implements OnItemSelectedListener

{

private Object gt;

@Override

public void onCreate(Bundle savedInstanceState) 

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// Spinner element

Spinner spinner = (Spinner) findViewById(R.id.spinner);

// Spinner click listener

spinner.setOnItemSelectedListener(this);

// Spinner Drop down elements

List&lt;String&gt;

categories = new ArrayList&lt;

String&gt;();

categories.add("Automobile");

categories.add("Business Services");

categories.add("Computers");

categories.add("Education");

categories.add("Personal");

categories.add("Travel");

// Creating adapter for spinner

ArrayAdapter&lt;String&gt; dataAdapter = new   ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_spinner_item, categories);

// Drop down layout style - list view with radio button

        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

// attaching data adapter to spinner

spinner.setAdapter(dataAdapter);

}

@Override

public void onItemSelected(AdapterView&lt;?&gt; parent, View view, int position, long id) 

{

// On selecting a spinner item

String item = parent.getItemAtPosition(position).toString();

// Showing selected spinner item

Toast.makeText(parent.getContext(), "Selected: " + item, Toast.LENGTH_LONG).show();

}

public void onNothingSelected(AdapterView&lt;?&gt; arg0) {

// TODO Auto-generated method stub

}

@Override

public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,long arg3) 

{

// TODO Auto-generated method stub

}

@Override

public void onNothingSelected(AdapterView<?> arg0) 

{

// TODO Auto-generated method stub

}}

6.Output is shown bellow