Monday, September 23, 2013

Android Spinner (Drop down list) - Simple Example

Below is the simple example of Spinner element in Android:

There are three steps to generate Spinner control in Android:

  • Define list of items in strings.xml file using "string-array".
  • Assign string array to "entries" property of Spinner control.
  • "getSelectedItem()" at code base will give selected item from the list.



Strings.xml

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

    <string name="app_name">Practicework</string>
    <string name="action_settings">Settings</string>
<string name="btn1">Check Status</string>

<string-array  name="countryname">
<item>Australia</item>
<item>New Zealand</item>
<item>England</item>
<item>Germany</item>
<item>France</item>    
        <item>India</item>
<item>Sri Lanka</item>
</string-array>
</resources>

activity_practice.xml

<LinearLayout 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:orientation="vertical"
android:background="#d0d0d0"
    tools:context=".PracticeActivity" >

<Spinner 
   android:id="@+id/spnr1"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:entries="@array/countryname"
   android:layout_margin="20dp"
   />


    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn1"
        android:layout_margin="20dp"
        />
</LinearLayout>

PracticeActivity.java

package com.agilissystems.practicework;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;

public class PracticeActivity extends Activity implements OnClickListener {


Button oBtn1;
Spinner oSpnr1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_practice);

        
        oBtn1 = (Button) findViewById(R.id.btn1);
        oSpnr1 = (Spinner) findViewById(R.id.spnr1);
        oBtn1.setOnClickListener(this);
    }


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


@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (arg0.getId() == R.id.btn1){
StringBuffer oStr1 = new StringBuffer();
oStr1.append(oSpnr1.getSelectedItem().toString());
Toast.makeText(this, "Country : " + oStr1.toString(), Toast.LENGTH_LONG).show();
}
}
}

First, select the country name from the spinner control and then click on Button "Check Status" will toast name of selected country.


No comments:

Post a Comment