Android Button Examples

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 google.com" /> 

</LinearLayout>

2. Code

Attach a click listener to the button.

When user click on it, open mobile browser and display URL : http://www.google.com.

File : MyAndroidAppActivity.java

package com.bishnu.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.google.com"));

       startActivity(browserIntent);

   }

  });

 }

}