ConstraintLayout中使用下拉刷新 SwipeRefreshLayout

ConstraintLayout中使用下拉刷新SwipeRefreshLayout

应该把 SwipeRefreshLayout 写到最外层

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/swipeRefreshLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.constraint.ConstraintLayout
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@mipmap/icon_forget_pwd_bg"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

      ........



    </android.support.constraint.ConstraintLayout>
</android.support.v4.widget.SwipeRefreshLayout>