给ListView列表添加数据展示动画

给ListView的数据展示  做点动画效果，数据较多时，手指往上拉动数据时，下面的数据感觉是往上推的，直接上关键代码：

---------------------动画文件res/anim：---------------------------------

up_from_bottom.xml:

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android"

android:shareInterpolator="@android:anim/decelerate_interpolator">

<translate

android:fromXDelta="0%" android:toXDelta="0%"

android:fromYDelta="100%" android:toYDelta="0%"

android:duration="300" />

</set>

down_from_top.xml：

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android"

android:shareInterpolator="@android:anim/decelerate_interpolator">

<translate

android:fromXDelta="0%" android:toXDelta="0%"

android:fromYDelta="-100%" android:toYDelta="0%"

android:duration="300" />

</set>

------------在ListView的Adapter中使用------------

public class MyAnimAdapter extends BaseAdapter {

private int lastPosition = -1;

.........................

public BeforeRecordAdapter(Context context) {

super(context);

}

............................

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder viewHolder;

if (null == convertView) {

viewHolder = new ViewHolder();

convertView = mInflater.inflate(R.layout.item_my_anim, null);

viewHolder.winnerTv = (TextView) convertView.findViewById(R.id.period_record_winner_name_tv);

viewHolder.ipTv = (TextView) convertView.findViewById(R.id.period_record_ip_tv);

viewHolder.userIdTv = (TextView) convertView.findViewById(R.id.period_record_winner_id_tv);

convertView.setTag(viewHolder);

}

else {

viewHolder = (ViewHolder) convertView.getTag();

}

setBeforeItemData(viewHolder, position);

.................//设置数据

if (position > lastPosition) {//这里就是动画的应用

Animation animation = AnimationUtils.loadAnimation(mContext, (position > lastPosition) ? R.anim.up_from_bottom :                                 R.anim.down_from_top);

convertView.startAnimation(animation);

lastPosition = position;

}

return convertView;

}

private static class ViewHolder {

private TextView winnerTv;

private TextView ipTv;

private TextView userIdTv;

public int rp;

}

}