下拉刷新(二)

先看主布局activity_main.xml

<RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"
    xmlns:tools="https://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    tools:context=".MainActivity" >

    <com.imooc.listviewfrashdemo1.ReFlashListView
        android:id="@+id/listview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@color/white"
        android:cacheColorHint="#00000000"
        android:dividerHeight="5dip" />
</RelativeLayout><RelativeLayout xmlns:and