几个图片是以另一个图片作为背景，如果定时器触发刷屏，则出现闪屏的现象。此例子演示了如何使用双缓存可解决闪屏的问题。-Another picture is a few pictures as the background, if the refresh timer is triggered, the splash screen phenomenon. This example demonstrates how to use the splash screen double buffer solve