sheishuoAPP/uikit/res-ptr2/layout/pull_to_refresh_header_custom.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">

    <FrameLayout
        android:id="@+id/fl_inner"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        >

        <com.netease.nim.uikit.common.ui.ptr2.LoadingView
            android:id="@+id/custom_loading"
            android:layout_width="fill_parent"
            android:layout_height="50dp"
            android:layout_gravity="bottom"
            app:left_ball_color="@color/left_ball_color"
            app:need_animation="false"
            app:right_ball_color="@color/right_ball_color"/>
    </FrameLayout>

</merge>