Alert Dialogue on launch example in android

Alert Dialogue on launch example in android

package com.textview;

import android.app.Activity;

import android.app.AlertDialog;
import android.os.Bundle;
import android.text.Html;

public class TextViewActivity extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
AlertDialog.Builder ab=new AlertDialog.Builder(TextViewActivity.this);
ab.setMessage(Html.fromHtml("<b><font color=#ff0000> Html View " +"</font></b><br>Androidpeople.com"));
ab.setPositiveButton("ok", null);
ab.show();
}
}

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" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/hello" />

</LinearLayout>