Android studio编译错误:Error: The WIFI_SERVICE must be looked up on the Application

编译错误

Error:Error: The WIFI_SERVICE must be looked up on the Application context or memory will leak on devices < Android N. Try changing  to .getApplicationContext()  [WifiManagerLeak]

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原因

Android 7.0 在获取 WifiManager的时候需要使用.getApplicationContext()，如果未使用会造成内存泄露。

解决方法

原来的：

WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);

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修改为：

WifiManager wifiManager = (WifiManager)getApplicationContext().getSystemService(WIFI_SERVICE);