讓屏幕保持高亮

<span style="font-size:18px;">PowerManager pm = (PowerManager) mContext
                    .getSystemService(Context.POWER_SERVICE);
            wakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK,
                    mContext.getClass().getCanonicalName());
            wakeLock.acquire();</span>

摘自 liuxiIT的專欄