我想安排一个Sql server任务（存储过程）在我的应用程序的后台运行，该任务从星期二开始每小时运行一次，直到任务返回数据，然后向用户发送通知，任务应该停止，直到下周二，然后在下周二，任务应该重新开始。
使用我已实现的代码，在第一个警报更新后，应用程序始终在AlarmReceiver类的OnReceive内循环。
MainActivity：
[Activity(Label = "Portal", Icon = "@drawable/icon", Theme = "@style/MainTheme", MainLauncher = true,
ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation,
WindowSoftInputMode = SoftInput.AdjustResize)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{ protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(bundle);
SecureStorageImplementation.StoragePassword = "1234**";
AsNumAssemblyHelper.HoldAssembly();
global::Xamarin.Forms.Forms.Init(this, bundle);
ImageCircleRenderer.Init();
try
{
if (Settings.AccessAlarm == 0)
{
Intent alarmIntent = new Intent(this, typeof(AlarmReceiver));
alarmIntent.SetClass(this, typeof(AlarmReceiver));
PendingIntent pending = PendingIntent.GetBroadcast(this, 0, alarmIntent, PendingIntentFlags.UpdateCurrent);
AlarmManager alarmManager = GetSystemService(AlarmService).JavaCast<AlarmManager>();
alarmManager.SetRepeating(AlarmType.RtcWakeup, 1000, BootReceiver.reminderInterval, pending);
PendingIntent pendingIntent = PendingIntent.GetBroadcast(this, 0, alarmIntent, 0);
Settings.AccessAlarm = 1;
}
}
catch (Exception e)
{
Settings.AccessAlarm = 0;
}
LoadApplication(new App());
if (Settings.AlarmNotification == 1 && Settings.LoginSucess && Intent.GetStringExtra("AcessKeyIntent") == "123")
{
Settings.Semana = "Next";
Xamarin.Forms.Application.Current.MainPage.Navigation.PushAsync(new EmentaTabbedPage());
}
Settings.AlarmNotification = 0;
}
}
BootReceiver：
[BroadcastReceiver]
[IntentFilter(new[] { Intent.ActionBootCompleted })]
public class BootReceiver : BroadcastReceiver
{
//the interval currently every one minute
//to set it to dayly change the value to 24 * 60 * 60 * 1000
public static long reminderInterval = AlarmManager.IntervalHour;
//public static long reminderInterval = 3 * 1000;
public static long FirstReminder()
{
System.Random rnd = new System.Random();
int minutenumber = rnd.Next(20, 40);
Java.Util.Calendar calendar = Java.Util.Calendar.Instance;
calendar.Set(Java.Util.CalendarField.DayOfWeek, Calendar.Tuesday);
calendar.Set(Java.Util.CalendarField.HourOfDay, 15);
calendar.Set(Java.Util.CalendarField.Minute, 20);
return calendar.TimeInMillis;
}
public override void OnReceive(Context context, Intent intent)
{
try
{
Console.WriteLine("BootReceiver: OnReceive");
var alarmIntent = new Intent(context, typeof(AlarmReceiver));
var pending = PendingIntent.GetBroadcast(context, 0, alarmIntent, PendingIntentFlags.UpdateCurrent);
AlarmManager alarmManager = (AlarmManager)context.GetSystemService(Context.AlarmService);
alarmManager.SetRepeating(AlarmType.RtcWakeup, FirstReminder(), reminderInterval, pending);
PendingIntent pendingIntent = PendingIntent.GetBroadcast(context, 0, alarmIntent, 0);
Settings.AccessAlarm = 1;
}
catch (Exception e)
{
Settings.AccessAlarm = 0;
}
}
}
AlarmReceiver：
[BroadcastReceiver]
public class AlarmReceiver : BroadcastReceiver
{
private int z = 0;
private int i;
private bool EmentaSequinteTest;
public void MethodTabs()
{
try
{
EmentaSequinteTest = false;
if (Settings.Username != "")
{
string query = "Mobileapp";
DbFetcherCheck a = new DbFetcherCheck();
EmentaSequinteTest
= a.Ementas(query, Settings.Username, "Next");
}
}
catch (Exception e)
{
if (z < 2)
{
if (Settings.Ip == "192.168.1.99")
{
z++;
Settings.Ip = "192.122.72.69";
MethodTabs();
}
else
{
z++;
Settings.Ip = "192.168.1.99";
MethodTabs();
}
}
else
{
z--;
}
}
}
public override void OnReceive(Context context, Intent intent)
{
try
{
MethodTabs();
if (EmentaSequinteTest)
{
Settings.AlarmNotification = 1;
//Stops/updates Alarm
Intent alarmIntent = new Intent(context, typeof(AlarmReceiver));
alarmIntent.SetClass(context, typeof(AlarmReceiver));
PendingIntent pending = PendingIntent.GetBroadcast(context, 0, alarmIntent, PendingIntentFlags.CancelCurrent);
AlarmManager alarmManager = (AlarmManager)context.GetSystemService(Context.AlarmService);
alarmManager.SetInexactRepeating(AlarmType.RtcWakeup,BootReceiver.FirstReminder(), 1 * 60 * 60 * 1000, pending);
var title = "Menu";
var message = "Menu is Available";
//The activity opened when we click the notification is SecondActivity
var resultIntent = new Intent(context, typeof(MainActivity));
resultIntent.PutExtra("AcessKeyIntent", "123");
var deleteIntent = new Intent(context, typeof(NotificationBroadcastReceiver));
deleteIntent.SetAction("Action");
// TODO: Set extras as needed.
var deletePendingIntent = PendingIntent.GetBroadcast(context, 0, deleteIntent, PendingIntentFlags.CancelCurrent);
PendingIntent pending1 = PendingIntent.GetActivities(context, 0,
new Intent[] { resultIntent },
PendingIntentFlags.OneShot);
using (var notificationManager = NotificationManager.FromContext(context))
{
Notification notification;
if (Android.OS.Build.VERSION.SdkInt < Android.OS.BuildVersionCodes.O)
{
notification = new Notification.Builder(context)
.SetContentTitle(title)
.SetContentText(message)
.SetAutoCancel(true)
.SetSmallIcon(Resource.Drawable.icon)
.SetDefaults(NotificationDefaults.All)
.SetDeleteIntent(deletePendingIntent)
.SetContentIntent(pending1)
.Build();
}
else
{
var myUrgentChannel = context.PackageName;
const string channelName = " App";
NotificationChannel channel;
channel = notificationManager.GetNotificationChannel(myUrgentChannel);
if (channel == null)
{
channel = new NotificationChannel(myUrgentChannel, channelName, NotificationImportance.High);
channel.EnableVibration(true);
channel.EnableLights(true);
channel.SetSound(
RingtoneManager.GetDefaultUri(RingtoneType.Notification),
new AudioAttributes.Builder().SetUsage(AudioUsageKind.Notification).Build()
);
channel.LockscreenVisibility = NotificationVisibility.Public;
notificationManager.CreateNotificationChannel(channel);
}
channel?.Dispose();
notification = new Notification.Builder(context)
.SetChannelId(myUrgentChannel)
.SetContentTitle(title)
.SetContentText(message)
.SetAutoCancel(true)
.SetDeleteIntent(deletePendingIntent)
.SetSmallIcon(Resource.Drawable.icon_notif)
.SetContentIntent(pending1)
.Build();
}
notificationManager.Notify(1331, notification);
notification.Dispose();
}
}
}
catch (Exception)
{
}
}
}
NotificationBroadcastReceiver：
[BroadcastReceiver]
public class NotificationBroadcastReceiver:BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
if (intent.Action == "Action")
{
Settings.AlarmNotification = 0;
}
}
}