StrictMode.setThreadPolicy

场景：写入代码StrictMode.setThreadPolicy…时提示StrictMode cannot be resolved是咋回事？如何添加Strict

写入代码StrictMode.setThreadPolicy……时提示StrictMode cannot be resolved是怎么回事？怎么添加Strict
写入代码StrictMode.setThreadPolicy……时
提示StrictMode cannot be resolved是怎么回事？怎么添加StrictMode？


------解决方案--------------------
jdk没发现这个类，谁知道这是谁写的类哟