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當我試圖用下面的代碼實現鎖定屏幕(當拔下充電器時),它不起作用。我是新的android可以任何人建議我。如何以編程方式鎖定我的平板電腦屏幕
case BatteryManager.BATTERY_STATUS_DISCHARGING:
Log.v("sunil2", "=======discharging");
statusString = "discharging";
PowerManager powermanager = ((PowerManager)context.getSystemService(Context.POWER_SERVICE));
WakeLock wakeLock=powermanager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "tag");
if(wakeLock.isHeld()) {
wakeLock.release();
}
我試過但它顯示安全例外: – sunil