AOSP 不锁屏，不休眠，屏幕灭屏但系统不休眠

1.不锁屏：

rameworks/base/packages/SettingsProvider/res/values/defaults.xml

-   <integer name="def_sleep_timeout">-1</integer>
+   <integer name="def_sleep_timeout">10</integer>


-   <bool name="def_lockscreen_disabled">false</bool>
+   <bool name="def_lockscreen_disabled">true</bool>

2.不休眠：

需要配合永不息屏 实则这里的永不息屏是伪“永不”！ 实际上就是设置Integer的最大值，换算时间大约是25天~

/frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java

private long getSleepTimeoutLocked() {
    final long timeout = mSleepTimeoutSetting;
    if (timeout <= 0) {
        return -1;
    }
-    return Math.max(timeout, mMinimumScreenOffTimeoutConfig);
+    return Math.max(timeout, Integer.MAX_VALUE);
}


private int getScreenOffTimeoutLocked(int sleepTimeout) {
    ....
        if (sleepTimeout >= 0) {
            timeout = Math.min(timeout, sleepTimeout);
        }
        
+       if (sleepTimeout > 0 ) {
+           return Integer.MAX_VALUE;
+       }
        
        return Math.max(timeout, mMinimumScreenOffTimeoutConfig);
 } 

mMinimumScreenOffTimeoutConfig所指向的默认值为：
路径： android/frameworks/base/core/res/res/values/config.xml

<integer name="config_minimumScreenOffTimeout">10000</integer>

3.屏幕灭屏但系统不休眠

android方案配置/init.xxx.rc中申请锁
chown system system /sys/power/wake_lock
chmod 0660 /sys/power/wake_lock
write /sys/power/wake_lock user_lock