PullDownListView高仿微信下拉眼睛出现动画，动画自定义PullDownListView，
pullDownListView.setOnPullHeightChangeListener设置下拉高度监听，onTopHeightChange（）
onBottomHeightChange（），onRefreshing（）其中提供者三个方法时刻刷新页面特效
引入布局：
<com.pulldownlistview.PullDownListView
android:id="@+id/pullDownListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#424242"
>
<RelativeLayout
android:id="@+id/layoutHeader"
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_alignParentTop="true" >
<com.yourCustomView..../>
</RelativeLayout>
<RelativeLayout
android:id="@+id/layoutFooter"
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_alignParentBottom="true" >
<com.yourCustomView..../>
</RelativeLayout>
</com.pulldownlistview.PullDownListView>
主要代码部分：
pullDownListView.setOnPullHeightChangeListener(new OnPullHeightChangeListener(){
@Override
public void onTopHeightChange(int headerHeight, int pullHeight) {
// TODO Auto-generated method stub
}
@Override
public void onBottomHeightChange(int footerHeight, int pullHeight) {
// TODO Auto-generated method stub
}
@Override
public void onRefreshing(boolean isTop) {
// TODO Auto-generated method stub
}
});
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