diff --git a/src/app/src/main/java/com/example/sleep/sensors/service/AliveJobService.java b/src/app/src/main/java/com/example/sleep/sensors/service/AliveJobService.java
new file mode 100644
index 0000000..a05c5da
--- /dev/null
+++ b/src/app/src/main/java/com/example/sleep/sensors/service/AliveJobService.java
@@ -0,0 +1,56 @@
+package com.example.sleep.service;
+
+import android.app.Service;
+import android.app.job.JobParameters;
+import android.app.job.JobService;
+import android.content.Intent;
+import android.os.Handler;
+import android.os.Message;
+
+import com.example.sleep.MainScreen;
+import com.example.sleep.utils.SystemUtils;
+
+/**
+ * 用于保活的JobService
+ */
+public class AliveJobService extends JobService {
+    private volatile static Service mKeepAliveService = null;
+
+    public static boolean isJobServiceAlive() {
+        return mKeepAliveService != null;
+    }
+
+    private static final int MESSAGE_ID_TASK = 0x01;
+
+    /**
+     * 用来保活的Handler
+     */
+    private Handler mHandler = new Handler(new Handler.Callback() {
+        @Override
+        public boolean handleMessage(Message msg) {
+            // 如果应用已经被关闭，则重新启动MainActivity
+            if (!SystemUtils.isAPPALive(getApplicationContext(), "com.howard.sleephelper")) {
+                Intent intent = new Intent(getApplicationContext(), MainScreen.class);
+                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                startActivity(intent);
+            }
+            jobFinished((JobParameters) msg.obj, false);
+            return true;
+        }
+    });
+
+    @Override
+    public boolean onStartJob(JobParameters params) {
+        mKeepAliveService = this;
+        Message msg = Message.obtain(mHandler, MESSAGE_ID_TASK, params);
+        mHandler.sendMessage(msg);
+        return true;
+    }
+
+    @Override
+    public boolean onStopJob(JobParameters params) {
+        // 移除保活的消息
+        mHandler.removeMessages(MESSAGE_ID_TASK);
+        return false;
+    }
+}
diff --git a/src/app/src/main/java/com/example/sleep/sensors/service/DaemonService.java b/src/app/src/main/java/com/example/sleep/sensors/service/DaemonService.java
new file mode 100644
index 0000000..ac6aefa
--- /dev/null
+++ b/src/app/src/main/java/com/example/sleep/sensors/service/DaemonService.java
@@ -0,0 +1,73 @@
+package com.example.sleep.service;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.Service;
+import android.content.Intent;
+import android.os.Build;
+import android.os.IBinder;
+import android.support.annotation.Nullable;
+import android.support.v4.app.NotificationCompat;
+
+import com.example.sleep.R;
+
+/**
+ * 用于显示通知的Service
+ */
+public class DaemonService extends Service {
+    public static final int NOTICE_ID = 100;
+    private NotificationManager manager;
+
+    @Nullable
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    /**
+     * 初始化获取channel manager与notification构造器
+     */
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+        Notification.Builder sleep = createNotification();
+        manager.notify(NOTICE_ID, sleep.build());
+    }
+
+    /**
+     * 创建通知及通知频道
+     *
+     * @return 通知构造器
+     */
+    Notification.Builder createNotification() {
+        Notification.Builder builder = new Notification.Builder(this);
+        builder.setSmallIcon(R.drawable.sleep_1)
+                .setContentTitle("睡眠助手")
+                .setContentText("正在记录您的睡眠...")
+                .setOngoing(true)
+                .setDefaults(NotificationCompat.DEFAULT_ALL);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel("1", "睡眠记录", NotificationManager.IMPORTANCE_LOW);
+            channel.canBypassDnd();
+            channel.getAudioAttributes();
+            channel.setBypassDnd(true);
+            channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PUBLIC);
+            manager.createNotificationChannel(channel);
+            builder.setChannelId("1");
+        }
+        return builder;
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        // 取消通知
+        NotificationManager mManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+        if (mManager != null) {
+            mManager.cancel(NOTICE_ID);
+        }
+    }
+}
diff --git a/src/app/src/main/java/com/example/sleep/sensors/service/GoSleepService.java b/src/app/src/main/java/com/example/sleep/sensors/service/GoSleepService.java
new file mode 100644
index 0000000..8e777f3
--- /dev/null
+++ b/src/app/src/main/java/com/example/sleep/sensors/service/GoSleepService.java
@@ -0,0 +1,152 @@
+package com.example.sleep.service;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.Service;
+import android.content.Intent;
+import android.os.Build;
+import android.os.IBinder;
+import android.support.v4.app.NotificationCompat;
+
+import com.example.sleep.R;
+import com.example.sleep.database.GetRecord;
+
+import java.util.Calendar;
+import java.util.Timer;
+import java.util.TimerTask;
+
+import static com.example.sleep.database.GetRecord.getRecord;
+
+public class GoSleepService extends Service {
+    NotificationManager mManager;
+    Notification.Builder sleep;
+
+    GetRecord myGet;
+
+    int hour;
+    int min;
+    boolean ifSleep = false;
+    boolean notification_on = false;
+
+    Timer timer;
+
+    /**
+     * 初始化，顺便获取当天是否已经睡觉记录，如已睡觉则不再提醒。
+     */
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        // 获取睡眠记录
+        myGet = getRecord();
+        // 获取通知管理器
+        mManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+        // 创建睡眠通知
+        sleep = createNotification();
+        // 休眠3秒，避免立即执行任务
+        try {
+            Thread.sleep(3000);
+        } catch (InterruptedException ignored) {
+        }
+        // 获取提醒时间
+        String remind = myGet.getRemind();
+        String[] res = remind.split(":");
+        hour = Integer.parseInt(res[0]);
+        min = Integer.parseInt(res[1]);
+        // 检查当天是否已经睡觉
+        ifSleep = ifSleepToday();
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        // 创建定时任务
+        TimerTask timerTask = new TimerTask() {
+            @Override
+            public void run() {
+                // 如果未睡觉且通知未显示，则检查是否到达提醒时间
+                if (!ifSleep && !notification_on) {
+                    Calendar now = Calendar.getInstance();
+                    if ((now.get(Calendar.HOUR_OF_DAY)) >= hour && (now.get(Calendar.MINUTE)) >= min) {
+                        // 显示睡眠提醒通知
+                        mManager.notify(2, sleep.build());
+                        notification_on = true;
+                    }
+                }
+            }
+        };
+        // 创建并执行定时任务，每30秒检查一次
+        timer = new Timer();
+        timer.schedule(timerTask, 0, 30000);
+        return START_STICKY;
+    }
+
+    // 此为开机自启成功与否测试
+    Notification.Builder createMyNotification() {
+        Notification.Builder builder = new Notification.Builder(this);
+        builder
+                .setContentTitle("睡眠助手")
+                .setDefaults(NotificationCompat.DEFAULT_ALL);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            // 创建通知频道
+            NotificationChannel channel = new NotificationChannel("3", "睡眠记录", NotificationManager.IMPORTANCE_DEFAULT);
+            channel.canBypassDnd();
+            channel.getAudioAttributes();
+            channel.setBypassDnd(true);
+            channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PUBLIC);
+            mManager.createNotificationChannel(channel);
+            builder.setChannelId("3");
+        }
+        return builder;
+    }
+
+    /**
+     * 创建通知及通知频道
+     *
+     * @return 通知构造器
+     */
+    Notification.Builder createNotification() {
+        Notification.Builder builder = new Notification.Builder(this);
+        builder.setSmallIcon(R.drawable.sleep_1)
+                .setContentTitle("睡眠助手")
+                .setContentText("小助手提醒您该睡觉啦")
+                .setOngoing(true)
+                .setDefaults(NotificationCompat.DEFAULT_ALL).setOngoing(true);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            // 创建通知频道
+            NotificationChannel channel = new NotificationChannel("2", "睡眠提醒", NotificationManager.IMPORTANCE_DEFAULT);
+            channel.canBypassDnd();
+            channel.getAudioAttributes();
+            channel.setBypassDnd(true);
+            channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PUBLIC);
+            mManager.createNotificationChannel(channel);
+            builder.setChannelId("2");
+        }
+        return builder;
+    }
+
+    /**
+     * 今日是否睡觉
+     *
+     * @return 已睡觉，未睡觉
+     **/
+    public boolean ifSleepToday() {
+        Calendar calendar = Calendar.getInstance();
+        return !getRecord().queryByDate(((calendar.get(Calendar.MONTH) + 1) + "-" + calendar.get(Calendar.DAY_OF_MONTH))).isEmpty();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public void onDestroy() {
+        // 取消定时任务和通知
+        timer.cancel();
+        mManager.cancel(2);
+        super.onDestroy();
+    }
+}
+
diff --git a/src/app/src/main/java/com/example/sleep/sensors/service/GrayService.java b/src/app/src/main/java/com/example/sleep/sensors/service/GrayService.java
new file mode 100644
index 0000000..9149e1a
--- /dev/null
+++ b/src/app/src/main/java/com/example/sleep/sensors/service/GrayService.java
@@ -0,0 +1,37 @@
+package com.example.sleep.service;
+
+import android.app.Notification;
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+
+public class GrayService extends Service {
+
+    private final static int GRAY_SERVICE_ID = -1001;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+    }
+
+    /**
+     * 利用曾经的漏洞保活
+     */
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        startForeground(GRAY_SERVICE_ID, new Notification());
+        //stopForeground(true);
+        stopSelf();
+        return super.onStartCommand(intent, flags, startId);
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        throw new UnsupportedOperationException("Not yet implemented");
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+    }
+}
diff --git a/src/app/src/main/java/com/example/sleep/sensors/service/SensorService.java b/src/app/src/main/java/com/example/sleep/sensors/service/SensorService.java
new file mode 100644
index 0000000..a1f571b
--- /dev/null
+++ b/src/app/src/main/java/com/example/sleep/sensors/service/SensorService.java
@@ -0,0 +1,170 @@
+package com.example.sleep.service;
+
+import android.content.Intent;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Messenger;
+import android.os.PowerManager;
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import com.example.sleep.database.GetRecord;
+import com.example.sleep.database.RecordBean;
+import com.example.sleep.sensors.Sensors;
+import com.shihoo.daemon.AbsWorkService;
+
+import java.util.Calendar;
+import java.util.Locale;
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.Action;
+import io.reactivex.functions.Consumer;
+
+import static android.content.ContentValues.TAG;
+import static com.example.sleep.database.GetRecord.getRecord;
+
+public class SensorService extends AbsWorkService {
+
+    private boolean isShouldStopService; // 标记是否应该停止服务
+    private Disposable mDisposable; // 用于取消任务的订阅
+    private Sensors sensor; // 传感器对象
+    private RecordBean mRecord; // 记录数据对象
+    private GetRecord mGetRecord; // 获取记录数据的对象
+
+    private boolean restart; // 标记是否需要重新启动
+    private long startTime; // 任务开始时间
+    PowerManager.WakeLock m_wake; // 电池锁对象
+
+    /**
+     * 是否任务完成, 不再需要服务运行?
+     *
+     * @return 应当停止服务, true; 应当启动服务, false; 无法判断, 什么也不做, null.
+     */
+    @Override
+    public Boolean shouldStopService(Intent intent, int flags, int startId) {
+        return isShouldStopService;
+    }
+
+    /**
+     * 任务是否正在运行?
+     *
+     * @return 任务正在运行, true; 任务当前不在运行, false; 无法判断, 什么也不做, null.
+     */
+    @Override
+    public Boolean isWorkRunning(Intent intent, int flags, int startId) {
+        // 若还没有取消订阅, 就说明任务仍在运行.
+        return mDisposable != null && !mDisposable.isDisposed();
+    }
+
+    @NonNull
+    @Override
+    public IBinder onBindService(Intent intent, Void v) {
+        // 此处必须有返回，否则绑定无回调
+        return new Messenger(new Handler()).getBinder();
+    }
+
+    /**
+     * 当服务被杀之后调用的方法
+     *
+     * @param rootIntent （继承的，么的用）
+     */
+    @Override
+    public void onServiceKilled(Intent rootIntent) {
+        if (sensor != null) {
+            Log.e(TAG, "i die");
+            sensor.stopSensor(); // 停止传感器
+        }
+    }
+
+    /**
+     * 当这个service正常停止后的方法（我们用的部分比较简单，暂时不需要继承方法提供的变量）
+     */
+    @Override
+    public void stopWork(Intent intent, int flags, int startId) {
+
+        isShouldStopService = true; // 设置停止服务标志为true
+
+        if (sensor != null) {
+            int[] details = sensor.stopSensor(); // 停止传感器并获取详细信息
+            int deepTime = details[0];
+            int swallowTime = details[1];
+            int awakeTime = details[2];
+            Calendar calendar = Calendar.getInstance();
+            if (mRecord != null) {
+                mGetRecord.finalUpdate(mRecord, calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE),
+                        calendar.getTimeInMillis() - startTime, deepTime, swallowTime, awakeTime);
+            }
+        }
+        // 取消对任务的订阅
+        if (mDisposable != null && !mDisposable.isDisposed()) {
+            mDisposable.dispose();
+        }
+    }
+
+    /**
+     * 我们尝试使用电池锁需要在初始化时仅一次调用电池锁，所以重写了这个start方法
+     * 考虑到兼容性和电量消耗在提交版本中未启用
+     */
+    void startService(Intent intent, int flags, int startId) {
+        // 若还没有取消订阅，说明任务仍在运行，为防止重复启动，直接 return
+        Boolean workRunning = isWorkRunning(intent, flags, startId);
+        if (workRunning != null && workRunning) {
+            return;
+        }
+        Log.d(TAG, " use this start power and " + SensorService.class.getName());
+        startWork(intent, flags, startId);
+    }
+
+    /**
+     * 当服务被杀之后重新开始的初始化部分，会被调用多次，进行了传感器的初始化以及注册
+     */
+    @Override
+    public void startWork(Intent intent, int flags, int startId) {
+        Calendar calendar = Calendar.getInstance();
+        startTime = calendar.getTimeInMillis();
+        // 注意：若启用mJobManager则需要重新调整reStart内容
+        mGetRecord = getRecord();
+        mRecord = mGetRecord.getLatestRecord();
+        if (mRecord != null) {
+            restart = !mRecord.getValid();
+        }
+        if (restart) {
+            mRecord = mGetRecord.getLatestRecord();
+            Log.e(TAG, "i stop");
+            sensor = new Sensors(this, mRecord); // 初始化传感器
+        } else {
+            mRecord = mGetRecord.insertData((calendar.get(Calendar.MONTH) + 1) + "-"
+                            + calendar.get(Calendar.DATE),
+                    String.format(Locale.getDefault(), "%02d:%02d",
+                            calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE)));
+            sensor = new Sensors(this, mRecord); // 初始化传感器
+        }
+        mDisposable = Observable
+                .interval(3, TimeUnit.SECONDS)
+                // 取消任务时取消定时唤醒
+                .doOnDispose(new Action() {
+                    @Override
+                    public void run() {
+                    }
+                })
+                .subscribe(new Consumer<Long>() {
+                    @Override
+                    public void accept(Long aLong) {
+                    }
+                });
+    }
+
+    /**
+     * 以后可能会用到的电池锁放开的方法
+     */
+    private void releaseWakeLock() {
+        if (null != m_wake && m_wake.isHeld()) {
+            Log.d(TAG, "call releaseWakeLock");
+            m_wake.release();
+            m_wake = null;
+        }
+    }
+}
+