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" />