Caused by: java.io.IOException: Target host must not be null, or set in parameters. scheme=null
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报错信息：
Caused by: java.io.IOException: Target host must not be null, or set in parameters. scheme=null, host=null, path=/storage/emulated/0/Android/data/人为省略。。/cache/temp/68/14804132878151747.gif以上报错主要是因为在网络下载的时候链接的不完整才导致的，所以我们需要在其前面添加上“http://”。链接完整后如下：
http://***/***/showImage/d_f/1/68/14804132878151747.gif 0 0
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