frameworks/base/services/core/java/com/android/server/display/DisplayPowerController.java
private void updatePowerState() {
.......
switch (mPowerRequest.policy) {
case DisplayPowerRequest.POLICY_OFF:
state = Display.STATE_OFF;
performScreenOffTransition = false; //改为true 就可以打开灭屏动画
break;
........
}
