Android TextView 字体滚动效果

package com.godinsec.seland.ui.tools; 
 
import android.content.Context; 
import android.text.TextUtils.TruncateAt; 
import android.util.AttributeSet; 
import android.widget.TextView; 
 
public class MarqueTextView extends TextView { 
 
  public MarqueTextView(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
    init(context); 
  } 
 
  public MarqueTextView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    init(context); 
  } 
 
  public MarqueTextView(Context context) { 
    super(context); 
    init(context); 
  } 
 
  private void init(Context context) { 
     setEllipsize(TruncateAt.MARQUEE) ; 
  } 
 
  @Override 
  public boolean isFocused() { 
 
    return true; 
  } 
} 

<com.godinsec.seland.ui.tools.MarqueTextView 
      android:id="@+id/tv_attention_name" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center_vertical" 
      android:layout_weight="1" 
       
      android:ellipsize="marquee" 
      android:focusable="true" 
      android:focusableInTouchMode="true" 
      android:marqueeRepeatLimit="marquee_forever" 
      android:singleLine="true" 
       
      android:text="XXXXXXXXXXXXXXXXXX" 
      android:textColor="@color/textcolor_black_b2" 
      android:textSize="@dimen/text_sp_s3" />