Set-wifi-advanced settings, choose to keep Wi-Fi on/off while charging only, do not keep Wi-Fi turned on during sleep, phone lock screen after a few minutes, then light the screen, WiFi has been displayed on the state

WORKAROUND: Shorten the response time;

Specific methods:

Path: Frameworks/base/services/java/com/android/server/wifi/wificontroller.java

Code: 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; /* minutes */
+ private static final Long Default_idle_ms = 1 * 60 * 1000; /* 1 minutes */

Set-wifi-advanced settings, choose to keep Wi-Fi on/off while charging only, do not keep Wi-Fi turned on during sleep, phone lock screen after a few minutes, then light the screen, WiFi has been displayed on the state