Android first applicaiton all my views are skewed

Android first applicaiton all my views are skewed

I created my first application. learning Android now. this is my main
activity:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:layout_width="fill_parent"
Creating Your First Android Application &#10072; 25
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="This is my first Android Application!" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="And this is a clickable button!" />
</LinearLayout>
But my items on the layout are skewed. Can anyone help, please?
Here is the link of the view
http://screencast.com/t/JmA3r48rosjM
Much Thanks,
T