Android Spinner

In Android, you can use “android.widget.Spinner” class to render a dropdown box selection list.

Spinners provide a quick way to select one value from a set. In the default state, a spinner shows its currently selected value. Touching the spinner displays a dropdown menu with all other available values, from which the user can select a new one.

You can add a spinner to your layout with the Spinner object. You should usually do so in your XML layout with a <Spinner> element.

<Spinner

android:id="@+id/spinner"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

Here i implements OnItemSelectedListener geting the Spinner selected item. I also set Spinner selected item to a text view (code: selection.setText(items[position]);

1.Spinner

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

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

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<TextView

android:id="@+id/selection"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<Spinner

android:id="@+id/spinner"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:drawSelectorOnTop="true" />

</LinearLayout>

2.Code

package com.learnsimply.spinnerexample;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.TextView;

public class MainActivity extends Activity implements OnItemSelectedListener{

TextView selection;

Spinner spin;

String[] items = { "India", "USA", "England", "australia", "japan",

"china", "korea" };

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

selection = (TextView) findViewById(R.id.selection);

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

spin.setOnItemSelectedListener(this);

ArrayAdapter<String> aa = new ArrayAdapter<String>(this,

android.R.layout.simple_spinner_item, items);

spin.setAdapter(aa);

}

@Override

public void onItemSelected(AdapterView<?> parent, View v, int position,

long id) {

// TODO Auto-generated method stub

selection.setText(items[position]);

}

@Override

public void onNothingSelected(AdapterView<?> arg0) {

// TODO Auto-generated method stub

selection.setText("");

}

}

Run the code

Download Source Code SpinnerExample.zip