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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <Button
        android:id="@+id/btn_webbrowser"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Web Browser"
        android:onClick="onClickWebBrowser" />
    <Button
        android:id="@+id/btn_makcalls"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Make Calls"
        android:onClick="onClickMakeCalls" />
    
    <Button
        android:id="@+id/btn_showMap"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Show Map"
        android:onClick="onClickShowMap" />

</LinearLayout>

package com.lynx.intents;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;

public class IntentsActivity extends Activity {
	
	int request_Code=1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }


    public void onClickWebBrowser(View view){
    	Intent i=new Intent(android.content.Intent.ACTION_VIEW,Uri.parse("http://www.amazon.com"));
    	startActivity(i);
    }
    
    public void onClickMakeCalls(View view){
    	Intent i=new Intent(android.content.Intent.ACTION_DIAL,Uri.parse("tel:+13503350416"));
    	startActivity(i);
    }
    
    public void onClickShowMap(View view){
    	Intent i=new Intent(android.content.Intent.ACTION_VIEW,Uri.parse("geo:37.827500,-122.481670"));
    	startActivity(i);
    }
    
}