Android TextView实现跑马灯效果的方法

public class MarqueeTextView extends TextView {

 public MarqueeTextView(Context con) {
 super(con);
 }

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

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

 @Override
 public boolean isFocused() {
 // TODO Auto-generated method stub
 if(getEditableText().equals(TruncateAt.MARQUEE)){
  return true;
 }
 return super.isFocused();
 }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">
 <FrameLayout
 android:id="@+id/titlebar_layout"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="#39ac69" >
 <LinearLayout

  android:layout_width="match_parent"
  android:layout_height="50dp"
  android:background="#ffffff"
  android:gravity="center_vertical"
  android:orientation="horizontal" >

  <ImageView
  android:id="@+id/home_location_iv"
  android:layout_width="25dp"
  android:layout_height="27dp"
  android:layout_marginLeft="10dp"
  android:scaleType="fitXY"
  android:src="@drawable/icon_place" />

  <com.lxj.marqueetextview.MarqueeTextView
  android:id="@+id/home_location_tv"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_marginLeft="10dp"
  android:layout_marginRight="10dp"
  android:layout_weight="1"
  android:ellipsize="marquee"
  android:focusable="true"
  android:focusableInTouchMode="true"
  android:gravity="center"
  android:marqueeRepeatLimit="marquee_forever"
  android:scrollHorizontally="true"
  android:singleLine="true"
  android:text="正在定位..."
  android:textColor="#39ac69"
  android:textSize="18sp" />

  <ImageView
  android:id="@+id/home_search_iv"
  android:layout_width="25dp"
  android:layout_height="27dp"
  android:layout_marginRight="10dp"
  android:scaleType="fitXY"
  android:src="@drawable/icon_place" />
 </LinearLayout>
</FrameLayout>
</LinearLayout>