安卓TextView的跑马灯效果

package com.jsako.marquee;

import android.content.Context;
import android.util.AttributeSet;
import android.view.ViewDebug.ExportedProperty;
import android.widget.TextView;

public class MarqueeTextView extends TextView {

    public MarqueeTextView(Context context, AttributeSet attrs) {
        super(context, attrs);

    }

    @Override
    @ExportedProperty(category = "focus")
    public boolean isFocused() {
        return true;
    }

}

<com.jsako.marquee.MarqueeTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="marquee"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:singleLine="true"
        android:text="你好我是超级无敌大神啊实打实的执行擦拭的权威安装现场阿萨德请问阿斯顿啊自行车阿萨德请问阿萨德自行车阿斯顿全文阿萨德自行车" />