在同一个layout里，多个textview单行滚动显示（跑马灯效果）

平时要想使textview单行滚动显示，必须设置以下属性，才能工作

<TextView
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:focusable="true"
android:ellipsize="marquee"
android:marqueeRepeatLimit="marquee_forever"
android:singleLine="true"
android:textColor="#000000"
android:textSize="20dp"
android:text="@string/marquee_text"/>

public class MarqueeTextView extends TextView {

public MarqueeTextView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}

public MarqueeTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}

public MarqueeTextView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

@Override
public boolean isFocused() {
// TODO Auto-generated method stub
return true;
}

}

<com.example.marqueetext.MarqueeTextView
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:ellipsize="marquee"
android:marqueeRepeatLimit="marquee_forever"
android:singleLine="true"
android:textColor="#000000"
android:textSize="20dp"
android:text="@string/marquee_text" />