Android 跑马灯

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    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:ellipsize="marquee"  
        android:focusable="true"  
        android:focusableInTouchMode="true"  
        android:marqueeRepeatLimit="marquee_forever"  
        android:singleLine="true" 
        android:drawableLeft="@drawable/aa"
        android:text="走马灯xml布局实现，哈哈。。。dddddddddddddddddddddddddddddddddddddd。ffffffffffffffffffff"   
/>    
</LinearLayout>