代码片

 Glide.with(***Activity.this)
                    .load(url)
                    .placeholder(currentItem.getDrawable())
                    .dontAnimate()
                    .into(currentItem);

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.yechaoa.spinnerdemo.MainActivity">
 
    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:entries="@array/letter" />  指定数据源
 
    <Spinner
        android:id="@+id/spinner2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1" />
 
    <Spinner
        android:id="@+id/spinner3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1" />