WakeLock 似乎没有按计划工作
我试图在应用程序发送通知时打开屏幕。目前，当我获取一个WakeLock时，它会非常快地闪烁，几乎不引人注意。据我所知，我的标志设置正确。 AQUIRE_CAUSES_WAKEUP 打开屏幕，ON_AFTER_RELEASE（戳用户活动计时器）在释放屏幕后将其保持打开状态 - 否则，我理解它立即关闭...有人有见解吗？
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "TAG");
if(mTurnScreenOn) {
wl.acquire();
Log.d("TAG", "WakeLock Acquired");
if(pm.isScreenOn()) { Log.d("TAG", "Screen is on");
} else { Log.d("TAG", "Screen is off"); }
}
mNotificationManager.notify(1, notification);
if(mTurnScreenOn) { //release the wakelock if needed
wl.release();
Log.d("TAG", "WakeLock Released");
if(pm.isScreenOn()) { Log.d("TAG", "Screen is on");
} else { Log.d("TAG", "Screen is off"); }
}
I'm trying to turn the screen on when the app sends a notification. Currently when I acquire a WakeLock it flashes on and off very quickly, almost un-noticeably. As far as I can tell I have my flags set correctly. AQUIRE_CAUSES_WAKEUP to turn the screen on and ON_AFTER_RELEASE to (poke the user activity timer) leave it on once I release it - otherwise, I understand it turning itself off immediately... Anyone got an insight?
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "TAG");
if(mTurnScreenOn) {
wl.acquire();
Log.d("TAG", "WakeLock Acquired");
if(pm.isScreenOn()) { Log.d("TAG", "Screen is on");
} else { Log.d("TAG", "Screen is off"); }
}
mNotificationManager.notify(1, notification);
if(mTurnScreenOn) { //release the wakelock if needed
wl.release();
Log.d("TAG", "WakeLock Released");
if(pm.isScreenOn()) { Log.d("TAG", "Screen is on");
} else { Log.d("TAG", "Screen is off"); }
}
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在您设置
mTurnScreenOn值的位置，查看您在mTurnScreenOn==true时获取唤醒锁的代码，并且在相同条件下您也释放它。有关详细信息，请参阅此
where you are setting the value of
mTurnScreenOn, Look at your code you are acquiring wake lock whenmTurnScreenOn==trueand on same condition your are releasing it also.for more info see this