解决android的跑马灯频繁刷新的问题

先贴一下跑马灯效果的代码，这里我是继承的TextView：

public class MarqueeTextView extends AppCompatTextView {

    public MarqueeTextView(Context context) {
        this(context,null);
    }

    public MarqueeTextView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public MarqueeTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context);
    }

    private void initView(Context context) {
        this.setEllipsize(TextUtils.TruncateAt.MARQUEE);
        this.setSingleLine(true);
        this.setMarqueeRepeatLimit(-1);
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        if(focused)
            super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

    @Override
    public void onWindowFocusChanged(boolean focused) {
        if(focused)
            super.onWindowFocusChanged(focused);
    }

    //最关键的部分
    @Override
    public boolean isFocused() {
        return true;
    }
}

 有时候跑马灯view会随着进度条每秒刷新，导致文本没显示全又从头开始滚动了。处理这个问题，目前我的解决办法是：在跑马灯view外层再加一层LinearLayout。

 <LinearLayout
            android:id="@+id/player_song_name_ll"
            android:layout_width="200dp"
            android:layout_height="50dp"
            android:orientation="horizontal"
            android:layout_below="@id/xxxx"
            android:layout_marginTop="34dp"
            android:layout_centerHorizontal="true">

            <xxxx.MarqueeTextView
                android:id="@+id/player_song_name_tv"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="center"
                android:text="你的背包"
                android:textColor="@color/white"
                android:textSize="32sp" />
        </LinearLayout>