Question

我想在一天中的特定时间启动此服务，但它不会响应。出现这种情况的原因是什么？

String time = sharedPrefs.getString("change_time", "");
    String[] parts = time.split(":");
    int chosenHour = Integer.parseInt(parts[0]);
    int chosenMinute = Integer.parseInt(parts[1]);
    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, chosenHour);
    cal.set(Calendar.MINUTE, chosenMinute);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);

    Intent i = new Intent(this, SmsService.class);
    PendingIntent pIntent = PendingIntent.getService(this, 0, i, 0);
    AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 86400000, pIntent);
    return super.onStartCommand(intent, flags, startId);

Answer 1

你把代码放在哪里？是在Service内（我看到super.onStartCommand(intent, flags, startId)吗？如果是，您是否开始提供服务？

为了安排AlarmManager，我建议将代码放在Application#onCreate()。

Answer 2

从MainActivity中调用此metod：

private void setNotifyAlarm() {
        long _alarm;
        Calendar now = Calendar.getInstance();
        Calendar wakeupcall = Calendar.getInstance();
        wakeupcall.setTimeInMillis(System.currentTimeMillis());
        wakeupcall.set(Calendar.HOUR_OF_DAY, 15);
        wakeupcall.set(Calendar.MINUTE, 30);

        if (wakeupcall.getTimeInMillis() <= now.getTimeInMillis())
            _alarm=wakeupcall.getTimeInMillis() + (AlarmManager.INTERVAL_DAY+1);
        else
            _alarm=wakeupcall.getTimeInMillis();


        al = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        notif= new Intent(this,NotifyService.class);
        fintent = PendingIntent.getService(this,0,notif,0);
        al.setRepeating(AlarmManager.RTC_WAKEUP,_alarm,AlarmManager.INTERVAL_DAY, fintent);

    }

此方法呼叫服务每天15:30。现在在您的服务类中：

@Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        String time = sharedPrefs.getString("change_time", "");
    String[] parts = time.split(":");
    int chosenHour = Integer.parseInt(parts[0]);
    int chosenMinute = Integer.parseInt(parts[1]);
    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, chosenHour);
    cal.set(Calendar.MINUTE, chosenMinute);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);

    Intent i = new Intent(this, SmsService.class);
    PendingIntent pIntent = PendingIntent.getService(this, 0, i, 0);
    AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 86400000, pIntent);
        return START_STICKY;
    }

在您的清单文件中添加以下内容：

<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<service android:name=".NotifyService" android:exported="true" android:enabled="true"/>

报警管理器在一天中的特定时间运行

2 个答案: