设置-wifi-高级设置，选择仅充电时保持WLAN开启/睡眠期间不保持wlan的开启状态，手机锁屏休眠几分钟后，再点亮屏幕，wifi一直显示开启状态

解决方法：缩短响应的时间；

具体方法：

路径：frameworks/base/services/java/com/android/server/wifi/WifiController.java

代码： class WifiController extends StateMachine {

* being enabled but not active exceeds the battery drain caused by

* re-establishing a connection to the mobile data network.

*/

-    private static final long DEFAULT_IDLE_MS = 15 * 60 * 1000; /* 15 minutes */

+    private static final long DEFAULT_IDLE_MS = 1 * 60 * 1000; /* 1 minutes */