Android TextView and ImageView simple instructions

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:andro 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 
    <TextView  
        android:layout_height="wrap_content" 
        android:layout_width="wrap_content" 
        android:drawableLeft="@drawable/icon" 
        android:text="@string/app_name" 
        /> 

</LinearLayout>