User Interface Controls

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.

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 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.Abhi.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);
 
			}
 
		});
 
	}
 
}
when you run this code you will get the android emulator and an button option when you click that you will be      redirected to google.com.
Have fun with android
Tc.