Android Spinner Dropdown-Example

An Android  Spinner is used to select one value from a set of values .In the default State a Spinner Shows the currently selected values.Touching the Spinner displays a drop down menu with all other available values ,from which the user can select a new one.

Creating Project:

Make sure your Android SDK,JDK and AVD for testing android Application.Create new project :

Step-1:Creating layout:

activity_home.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="com.shahimtiyaj.alertdialoge.HomeActivity"

    android:background="@drawable/im3"  >

  /RelativeLayout>

Step-2:Creating layout:

activity_spinner.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" 

    android:background="@drawable/im1">

    

    <Spinner 

        

        android:id="@+id/viewSpin"

        android:layout_width="match_parent"

        android:layout_height="fill_parent"

        android:paddingRight="10dp"

        android:textDirection="firstStrong"

        android:prompt="@array/option"

        />

    </LinearLayout>

Step-3:Creating Values:

array.xml:

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

<resources>

    

     <string-array name="option" >

          <item >BDNews24</item> 

        <item >Banglamail</item> 

       <item >eprothom-alo</item> 

       <item >Somoyer konthoshor </item> 

        <item >Daily Naya Digonta</item> 

         <item >Jugantor</item> 

       

      </string-array>

    </resources>

Step-2:Creating MainActivity
HomeActivity.java:

package com.shahimtiyaj.alertdialoge;

import android.R.anim;

import android.support.v7.app.ActionBarActivity;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.Adapter;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

public class HomeActivity extends ActionBarActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_home);

        

        OpenDialog();

        

    }

private void OpenDialog() {

AlertDialog.Builder dialog=new AlertDialog.Builder(this);

dialog.setTitle("Select Category");

LayoutInflater inflater=(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

iew  v=inflater.inflate(R.layout.view, null);

     

       dialog.setView(v);

      dialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

}

});

      

   dialog.setNegativeButton("No", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

}

});

      

     dialog.show();

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

     

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

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

spinner.setAdapter(adapter);

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view,

int position, long id) {

// TODO Auto-generated method stub

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

// TODO Auto-generated method stub

}

});

}

}

Step-3:Creating Manifest:

No other Special permission for our project

AndroidManifest.xml

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

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

    package="com.wub.alertdialoge"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="9"

        android:targetSdkVersion="19" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".HomeActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

Finally Run the project in the Emulator:

 

Click here for finding Source Code.....