android - 一段时间后服务停止工作。需要连续工作

Question

我正在开发一个计步器应用程序，我可以在其中计算步行的步数并在午夜将其更新到服务器。我有一个持续运行的服务来完成这一切。

这是我的服务:

    public class StepCounterService extends Service implements SensorEventListener, StepListener, WebServiceInterface, GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener, LocationListener {

    private static final int SERVICE_ID = 27;
    private static final int SEND_SESSION_REQUEST_CODE = 1;
    private static final int SEND_ACTIVITY_REQUEST_CODE = 2;
    private static final int MAIN_NOTIFICATION_ID = 3;
    private static final int SECONDARY_NOTIFICATION_ID = 4;
    private LocalBroadcastManager broadcaster;

    static final public String STEP_INCREMENT = "com.app.STEP_INCREMENTED";
    static final public String SESSION_COMPLETE = "com.app.SESSION_COMPLETE";
    static final public String ACTIVITY_COMPLETE = "com.app.ACTIVITY_COMPLETE";
    static final public String STEP_INCREMENT_KEY = "step_count";

    Session session;

    private StepDetector stepDetector;
    private SensorManager sensorManager;
    private Sensor sensor;
    private int numberOfSteps = 0;

    private GoogleApiClient googleApiClient;
    private LocationRequest mLocationRequest;
    double currentLatitude;
    double currentLongitude;
    ArrayList<String> arrayListLocations;
    private AlarmManager sendActivityAlarmManager;
    private PendingIntent activityAlarmIntent;

    private NotificationManager notificationManager;
    RemoteViews contentView;
    PowerManager.WakeLock wl;
    private String TAG = "Wake Lock Tag";
    private int SET_LAST_LOCATION_REQUEST_CODE = 5;


    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
        return START_STICKY;
    }

    @Override
    public void onTaskRemoved(Intent rootIntent) {
        // TODO Auto-generated method stub
        System.out.println("---- In onTaskRemoved Function");
        restartKilledService();
    }

    @Override
    public void onDestroy() {
        System.out.println("---- In onDestroy Function");
        if (wl != null) {
            wl.release();
        }
        super.onDestroy();
        restartKilledService();
    }

    void restartKilledService() {

        System.out.println("---- In restartKilledService Function");

        Intent restartService = new Intent(getApplicationContext(), StepCounterService.class);
        restartService.setPackage(getPackageName());
        PendingIntent restartServicePI = PendingIntent.getService(getApplicationContext(), StepCounterService.SERVICE_ID, restartService, PendingIntent.FLAG_CANCEL_CURRENT);

        AlarmManager alarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
        alarmService.set(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime() + 100, restartServicePI);
    }

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub

        PowerManager pm = (PowerManager) getApplicationContext().getSystemService(getApplicationContext().POWER_SERVICE);
        wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
        wl.acquire();

        super.onCreate();

        session = new Session(this);
        buildGoogleApiClient();

        broadcaster = LocalBroadcastManager.getInstance(this);

        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        stepDetector = new StepDetector();
        stepDetector.registerListener(StepCounterService.this);

        Context ctx = getApplicationContext();
        Calendar cal = Calendar.getInstance();
        AlarmManager am = (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
        long interval = 1000 * 60 * 5; // 5 minutes in milliseconds
        Intent serviceIntent = new Intent(ctx, StepCounterService.class);

        PendingIntent servicePendingIntent = PendingIntent.getService(ctx, StepCounterService.SERVICE_ID, serviceIntent, PendingIntent.FLAG_CANCEL_CURRENT);
        am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), interval, servicePendingIntent);

        sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_FASTEST);

        notificationManager = (NotificationManager) getSystemService(Activity.NOTIFICATION_SERVICE);
        contentView = new RemoteViews(getPackageName(), R.layout.notification_layout);
        contentView.setImageViewResource(R.id.image, R.drawable.notif_icon);

        if (session.getUser() != null && !(session.getUser().getName().equals("")))
            updateMainNotification(session.getTodaySteps() + "");

        startAlarm();
    }


    protected synchronized void buildGoogleApiClient() {
        googleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
        googleApiClient.connect();

        mLocationRequest = LocationRequest.create()
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                .setInterval(10 * 1000)        // 10 seconds, in milliseconds
                .setFastestInterval(1 * 1000);
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
            stepDetector.updateAccel(event.timestamp, event.values[0], event.values[1], event.values[2]);
        }
    }

    @Override
    public void step(long timeNs) {
        numberOfSteps = session.getTodaySteps();
        numberOfSteps++;

        sendStepIncrementBroadcast(numberOfSteps);

        session.setTodaySteps(numberOfSteps);

        if (session.getUser() != null && !(session.getUser().getName().equals("")))
            updateMainNotification(numberOfSteps + "");
        else {
            try {
                notificationManager.cancel(MAIN_NOTIFICATION_ID);
            } catch (Exception e) {

            }
        }
    }

    public void sendStepIncrementBroadcast(int numberOfSteps) {
        Intent intent = new Intent(STEP_INCREMENT);
        intent.putExtra(STEP_INCREMENT_KEY, numberOfSteps);
        broadcaster.sendBroadcast(intent);
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int i) {

    }

    public float[] getDataFromSteps(int stepsCount) {
        float caloriesCount = 0;
        float creditsCount = 0;
        try {
            double adjustedWeight = Double.parseDouble(session.getUser().getWeight()) / LinksAndKeys.weightAdjuster;
            caloriesCount = Math.round(((adjustedWeight * LinksAndKeys.metValue) / LinksAndKeys.setPace) * (stepsCount / LinksAndKeys.stepsPerMile));
            caloriesCount = caloriesCount * 1.2f;
            creditsCount = caloriesCount / 25.4f;
        } catch (Exception e) {
            caloriesCount = 0;
            creditsCount = 0;
        }

        float[] resultantFloat = {caloriesCount, creditsCount};
        return resultantFloat;
    }

    private void startAlarm() {

        sendActivityAlarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);

        Intent intent = new Intent(this, ActivityCompleteReceiver.class);
        activityAlarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 58);
//        calendar.set(Calendar.HOUR_OF_DAY, generateRandomTime()[0]);
//        calendar.set(Calendar.MINUTE, generateRandomTime()[1]);

        if (System.currentTimeMillis() > calendar.getTimeInMillis()) {
            calendar.add(Calendar.DAY_OF_YEAR, 1);
        }

        sendActivityAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, activityAlarmIntent);
    }

    private void updateMainNotification(String stepsValue) {

        String title = "Today: " + stepsValue + " steps - " + LinksAndKeys.decimalFormat.format(getDataFromSteps(session.getTodaySteps())[1]) + " FIMOs";
        String message = "Keep Walking and Keep Earning";

        contentView.setTextViewText(R.id.textViewTitle, title);
        contentView.setTextViewText(R.id.textViewMessage, message);

        Intent notificationIntent = new Intent(StepCounterService.this, SplashActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent = PendingIntent.getActivity(StepCounterService.this, 0, notificationIntent, 0);


        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.running_icon)
                .setContent(contentView).setContentIntent(intent);

        Notification notification = mBuilder.build();
        notification.flags |= Notification.FLAG_ONGOING_EVENT;
//        notificationManager.notify(MAIN_NOTIFICATION_ID, notification);
        startForeground(MAIN_NOTIFICATION_ID, notification);
    }

    private void updateReminderNotification() {

        String title = "A gentle reminder";
        String message = "Its time to get on track";

        contentView.setTextViewText(R.id.textViewTitle, title);
        contentView.setTextViewText(R.id.textViewMessage, message);

        Intent notificationIntent = new Intent(StepCounterService.this, SplashActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent = PendingIntent.getActivity(StepCounterService.this, 0, notificationIntent, 0);


        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.running_icon)
                .setContent(contentView).setContentIntent(intent);

        Notification notification = mBuilder.build();
        notificationManager.notify(SECONDARY_NOTIFICATION_ID, notification);
    }

    private int[] generateRandomTime() {
        int[] timeIntegers = new int[2];

        final Random r = new Random();
        timeIntegers[0] = r.nextInt(58 - 56) + 56;
        timeIntegers[1] = r.nextInt(59 - 1) + 1;

        return timeIntegers;
    }
}

这是 Activity 完成接收器:

public class ActivityCompleteReceiver extends BroadcastReceiver implements WebServiceInterface {

    Session session;
    private LocalBroadcastManager broadcaster;
    static final public String ACTIVITY_COMPLETE = "com.fimo.ACTIVITY_COMPLETE";
    private static final int SEND_ACTIVITY_REQUEST_CODE = 1;
    Gson gson;
    MyDatabase myDatabase;
    UserActivity currentUserActivity;

    @Override
    public void onReceive(Context context, Intent intent) {

        session = new Session(context);
        broadcaster = LocalBroadcastManager.getInstance(context);
        myDatabase = new MyDatabase(context);
        gson = new Gson();

        sendActivityToServer(context, session.getUser().getId(), session.getTodaySteps());
    }

    private void sendActivityToServer(Context context, String id, int steps) {

        Calendar c = Calendar.getInstance();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String date = dateFormat.format(c.getTime());

        UserActivity userActivity = new UserActivity();
        userActivity.setDate(date);
        userActivity.setSteps(steps);
        userActivity.setCalories(getDataFromSteps(steps)[0]);
        userActivity.setCredits(getDataFromSteps(steps)[1]);

        currentUserActivity = userActivity;

        if (isNetworkAvailable(context)) {
            HashMap<String, String> paramsList = new HashMap<>();
            ArrayList<UserActivity> arrayListUserActivity = myDatabase.getAllUserActivities();
            arrayListUserActivity.add(userActivity);

            paramsList.put(LinksAndKeys.ID_KEY, id);
            paramsList.put(LinksAndKeys.DATA_KEY, gson.toJson(arrayListUserActivity));

            Log.d("Receiver Request ----", id + " - " + gson.toJson(arrayListUserActivity));

            WebServiceController webServiceController = new WebServiceController(
                    context, ActivityCompleteReceiver.this);
            String hitURL = LinksAndKeys.SEND_ACTIVITY_URL;
            webServiceController.sendSilentRequest(false, hitURL, paramsList, SEND_ACTIVITY_REQUEST_CODE);
        } else {
            myDatabase.addUserActivity(currentUserActivity);
            currentUserActivity = null;

            Intent in = new Intent(ACTIVITY_COMPLETE);
            broadcaster.sendBroadcast(in);

            session.setTodaySteps(0);
        }

    }

    private boolean isNetworkAvailable(Context context) {
        ConnectivityManager connectivityManager
                = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        return activeNetworkInfo != null && activeNetworkInfo.isConnected();
    }

    @Override
    public void getResponse(int responseCode, String responseString, String requestType, int requestCode) {
        if (requestCode == SEND_ACTIVITY_REQUEST_CODE && responseCode == 200) {
            try {
                JSONObject responseObject = new JSONObject(responseString);
                String message = responseObject.getString("message");
                if (message.equals("Success")) {

                    myDatabase.deleteAllUserActivities();

                    JSONObject jsonObject = responseObject.getJSONObject("data");
                    session.setServerCredits(Float.parseFloat(jsonObject.getString("credits")));

                    Intent in = new Intent(ACTIVITY_COMPLETE);
                    broadcaster.sendBroadcast(in);

                    session.setTodaySteps(0);
                } else {
                    myDatabase.addUserActivity(currentUserActivity);
                    currentUserActivity = null;

                    Intent in = new Intent(ACTIVITY_COMPLETE);
                    broadcaster.sendBroadcast(in);

                    session.setTodaySteps(0);
                }

            } catch (Exception e) {
                myDatabase.addUserActivity(currentUserActivity);
                currentUserActivity = null;

                Intent in = new Intent(ACTIVITY_COMPLETE);
                broadcaster.sendBroadcast(in);

                session.setTodaySteps(0);
            }
        } else {
            if (currentUserActivity != null) {
                myDatabase.addUserActivity(currentUserActivity);
                currentUserActivity = null;

                Intent in = new Intent(ACTIVITY_COMPLETE);
                broadcaster.sendBroadcast(in);

                session.setTodaySteps(0);
            }
        }
    }

    public float[] getDataFromSteps(int stepsCount) {
        float caloriesCount = 0;
        float creditsCount = 0;
        try {
            double adjustedWeight = Double.parseDouble(session.getUser().getWeight()) / LinksAndKeys.weightAdjuster;
            caloriesCount = Math.round(((adjustedWeight * LinksAndKeys.metValue) / LinksAndKeys.setPace) * (stepsCount / LinksAndKeys.stepsPerMile));
            caloriesCount = caloriesCount * 1.2f;
            creditsCount = caloriesCount / 25.4f;
        } catch (Exception e) {
            caloriesCount = 0;
            creditsCount = 0;
        }

        float[] resultantFloat = {caloriesCount, creditsCount};
        return resultantFloat;
    }
}

编写的代码应该以这种方式运行:

每天统计用户的步数。 -> 在 11.56-11.59 之间的特定时间午夜，将数据发送到 Activity 完成接收器 -> 接收器接收数据并尝试将其发送到服务器(如果互联网可用)。如果没有，则将其保存到本地数据库 -> 保存或发送后，将步数重置为 0，第二天服务从 0 开始重新计数。

问题是服务在给定时间的某些天实际上没有工作，并且接收者没有收到 Activity 完成的 Intent 。如果我保持电话开机并通过设置一个比当前时间晚几分钟的时间来测试它，服务就可以正常工作。但是，如果电话长时间保持不动，那么我认为这种情况会在服务停止工作时发生。这是我的猜测，实际问题可能是别的。非常感谢任何建议或解决方案。

Answer 1

从 API 级别 19 开始，使用 AlarmManager.setRepeating() 调用您的 ActivityCompleteReceiver 并不可靠准确。 Android 可以根据需要延迟发送此警报。如果您真的希望它在每天的确切时间触发，您应该执行以下操作:

使用 AlarmManager.setExact() 并为下一次触发时间设置一个警报(不是重复警报)。发送此警报后，发送您的统计信息或任何您想要的内容，然后调用 AlarmManager.setExact() 设置下一个警报(第二天)。您应该避免使用 setRepeating() 除非您绝对需要使用它。

您需要注意使用唤醒锁做什么，因为您当前的代码始终保持部分唤醒锁，这将防止设备进入休眠状态，这会耗尽电池电量。阅读有关如何优化电池使用的信息。