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private void lock() {
PowerManager mPowerManager = (PowerManager) getSystemService(POWER_SERVICE);
wakeLock = mPowerManager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK |
PowerManager.ON_AFTER_RELEASE, "tag");
wakeLock.acquire();
}
private void unLock() {
if (null != wakeLock) {
wakeLock.release();
}
}