Android使用ViewFlipper实现上下滚动消息

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@+id/ll_notice_root"
       android:layout_width="match_parent"
       android:layout_height="40dp"
       android:background="#ffe4c3"
       android:gravity="center_vertical"
       android:orientation="horizontal">
 
  <ViewFlipper
    android:id="@+id/vf_notice_scroll"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"/>
 
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:gravity="center_vertical"
       android:orientation="horizontal">
 
  <TextView
    android:id="@+id/tv_notice_item_itle"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:layout_weight="1"
    android:text="标题"
    android:textColor="#9B6916"
    android:textSize="12dp"/>
 
  <TextView
    android:id="@+id/tv_notice_item_time"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:text="06:28"
    android:textColor="#999999"
    android:textSize="12dp"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 
  <translate
    android:duration="500"
    android:fromYDelta="100.0%p"
    android:toYDelta="0.0"/>
 
  <alpha
    android:duration="500"
    android:fromAlpha="0.0"
    android:toAlpha="1.0"/>
 
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 
  <translate
    android:duration="500"
    android:fromYDelta="0.0"
    android:toYDelta="-100.0%p"/>
 
  <alpha
    android:duration="500"
    android:fromAlpha="1.0"
    android:toAlpha="0.0"/>
 
</set>

public void startFlipping(Context context, ViewFlipper vf, ArrayList<MessageBean> infos){
    vf.setInAnimation(context, R.anim.notice_in);
    vf.setOutAnimation(context, R.anim.notice_out);
    int len = infos.size();
    for (int i = 0; i < len; i++) {
      MessageBean info = infos.get(i);
      View v = ((Activity) context).getLayoutInflater().inflate(R.layout.notice_item, null);
      TextView titleTv = (TextView) v.findViewById(R.id.tv_notice_item_title);
      titleTv.setText(info.title);
      TextView timeTv = (TextView) v.findViewById(R.id.tv_notice_item_time);
      timeTv.setText(info.time);
      vf.addView(v);
    }
    vf.startFlipping();
}