Android button example-JavaTyro

Monday 1 July 2013

Android button example

In Android Beginner, button // siddhu vydyabhushana // Leave a Comment

In Android, just use “android.widget.Button” class to display a normal button.
In this tutorial, we show you how to display a normal button, add a click listener, when user click on the button, open an URL in your Android’s internet browser.
P.S This project is developed in Eclipse 3.7, and tested with Android 2.3.3.

Note
For more advance function, like image, please refer to this ImageButton example and also this ImageButton selector example.

1. Add Button

Open “res/layout/main.xml” file, add a button.
File : res/layout/main.xml

<?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" >
 
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button - Go to mkyong.com" />
 
</LinearLayout>

2. Code Code

Attach a click listener to the button.
When user click on it, open mobile browser and display URL : http://www.mkyong.com.
File : MyAndroidAppActivity.java

package com.mkyong.android;
 
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
 
public class MyAndroidAppActivity extends Activity {
 
 Button button;
 
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
 
  addListenerOnButton();
 
 }
 
 public void addListenerOnButton() {
 
  button = (Button) findViewById(R.id.button1);
 
  button.setOnClickListener(new OnClickListener() {
 
   @Override
   public void onClick(View arg0) {
 
     Intent browserIntent = 
                            new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.mkyong.com"));
       startActivity(browserIntent);
 
   }
 
  });
 
 }
 
}

3. Demo

Run the application.
1. Result, a normal button.

2. Click on the button, display URL in browser.

Download Source Code

Download it – Android-Button-Example.zip (15 KB)

Monday 1 July 2013