I'm just trying to get a multiple countdown counters, when it reaches individually to 0 I want to sound an alert (without any interaction from the user between one and the next).
The countdown is programmed, for instance, to 5, 4 and 7 minutes.
If it's seconds and the app works with the screen ON or just seconds there's no problem, but as soon as it's minutes, the screen turns off and the phone goes into Doze mode (I think), the resulting times are: 5, 6:26 and 9:58 (instead 5,4 and 7).
I've read a lot of user solutions that have been discussed here, but it doesn't work for me.
The phone runs Android v10.
The code to program the Alarm with SetExactAndAllowWhileIdle:
public void ProgAlarm(int nIntervalo) {
var alarmIntent = new Intent(MainActivity.Instance, typeof(AlarmReceiver));
alarmIntent.PutExtra("Contador", nIntervalo);
var pending = PendingIntent.GetBroadcast(MainActivity.Instance, 0, alarmIntent, PendingIntentFlags.UpdateCurrent);
MainActivity.alarM.SetExactAndAllowWhileIdle(AlarmType.ElapsedRealtimeWakeup,
SystemClock.ElapsedRealtime()+tiempos[nIntervalo]*1000, pending);
}
And the event triggerd to reprogram the alarm:
[BroadcastReceiver]
public class AlarmReceiver: BroadcastReceiver {
public override void OnReceive(Context context, Intent intent) {
DependencyService.Get<IVarios>().Beep();
int actual=intent.GetIntExtra("Contador",-1);
if (actual!=-1) DependencyService.Get<IVarios>().ProgAlarm(++actual);
}
}
Before the Alarm I tried with PowerManager:
PowerManager pM = (PowerManager)GetSystemService(PowerService);
wakeLock=pM.NewWakeLock(WakeLockFlags.Partial, "CronoMultiple");
[...]
wakeLock.Acquire();
[...]
wakeLock.Release();
and with the flag: WakeLockFlags.AcquireCausesWakeup
But this only works when the screen was always ON, with flag .Partial, the screen turns off and the app stops and the counter doesn't work. In the PC emulator it works (even with adb commands), but not on the phone.
Any solution without using a Service? (I'm new to Xamarin.forms).
Here is a simple sample ,it will alarm every 1 min:
interface IVarios
public interface IVarios
{
void ProgAlarm(int minute);
}
in MainActivity,let it implement IVarios :
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity,IVarios
{
public void ProgAlarm(int minute)
{
Intent intent = new Intent(MainActivity.Instance, typeof(LongRunningService));
intent.PutExtra("Contador", minute);
MainActivity.Instance.StartService(intent);
}
}
in Android project,create LongRunningService :
[Service]
class LongRunningService : Service
{
int minutes;
public override IBinder OnBind(Intent intent)
{
return null;
}
public override void OnCreate()
{
base.OnCreate();
}
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
Android.Util.Log.Error("LongRunningService", "executed");
AlarmManager manager = (AlarmManager)GetSystemService(AlarmService);
int min = intent.GetIntExtra("Contador", -1);
minutes = min != -1 ? min : minutes;
int anHour = minutes * 60 * 1000; // Number of milliseconds
long triggerAtTime = SystemClock.ElapsedRealtime() + anHour;
Intent i = new Intent(this, typeof(AlarmReceiver));
PendingIntent pi = PendingIntent.GetBroadcast(this, 0, i, PendingIntentFlags.UpdateCurrent);
manager.SetExactAndAllowWhileIdle(AlarmType.ElapsedRealtimeWakeup, triggerAtTime, pi);
return StartCommandResult.Sticky;
}
}
in Android project,create AlarmReceiver :
[BroadcastReceiver(Enabled = true)]
[IntentFilter(new[] { Android.Content.Intent.ActionBootCompleted })]
class AlarmReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Intent i = new Intent(context, typeof(LongRunningService));
context.StartService(i);
}
}
Then you could call it in your page like :
DependencyService.Get<IVarios>().ProgAlarm(1);
Related
Copied my teacher's simplified code in order to see if the code i wrote was wrong or somthing yet even her's isnt working. Here is it:
private void BtnAlarm_Click(object sender, EventArgs e)
{
Intent intentAlarm = new Intent(this, typeof(AlarmReceiver));
// #2 - Pending intent - > Broadcast
PendingIntent pendingIntent = PendingIntent.GetBroadcast(Application.Context, 1, intentAlarm, 0);
// #3 - Set Alarm Manager
AlarmManager alarmManager = (AlarmManager)GetSystemService(AlarmService);
//30s
alarmManager.SetExactAndAllowWhileIdle(AlarmType.ElapsedRealtimeWakeup,
SystemClock.ElapsedRealtime() + 30 * 1000, pendingIntent);
}
The debugger wont run onto this activity:
public class AlarmReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Received intent!", ToastLength.Short).Show();
}
}
Just to be clear, while running her app the alarm was working.
You could use the code below with your AlarmReceiver:
[BroadcastReceiver(Enabled = true, Exported = false)]
public class AlarmReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Received intent!", ToastLength.Short).Show();
}
}
I am totally new in Xamarin. I am trying to run the service when the application gets closed. But as I closed the app from the recent item service getting stop and getting message projectname.android has stopped. I want service should run as in whatsapp after closed the app then also service run. Anyone know the answer please help.
Here is my service class Code. This code sent the notification each 5 sec. using local notification plugin library. but this code running fine in android 5 version
class AndroidService : Service
{
private Timer _check_Timer_Data;
public override IBinder OnBind(Intent intent)
{
return null;
}
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
base.OnStartCommand(intent, flags, startId);
var t = new Thread(() =>
{
_check_Timer_Data = new Timer((o) =>
{
Random rdno = new Random();
int id = rdno.Next(1000);
string dt = DateTime.Now.ToString("h:mm:ss tt");
CrossLocalNotifications.Current.Show("G7CR", "G7CR Notification-" + dt, id);
}, null, 0, 5000);
}
);
t.Start();
return StartCommandResult.Sticky;
}
public override void OnDestroy()
{
base.OnDestroy();
_check_Timer_Data.Dispose();
}
public override void OnCreate()
{
base.OnCreate();
}
}
I'm developing an Android application with Xamarin Forms that is composed of an interface and also a background service.
I need that the service works also when the interface application is closed.
If I add "IsolatedProcess = true" into the service the graphical interface still works but the service crashes.
I read a lot of posts with possible solutions but they don't work. (I tried to compile in release mode and also to remove "Use Shared Runtime" flag).
I'm compiling with Android 8.1 (Oreo) as Target Framework.
The target environment is Android 4.2.
I start the service into OnCreate method of the MainActivity class:
Intent testIntent = new Intent(this.BaseContext, typeof(TestService));
StartService(testIntent);
The service class:
[Service(IsolatedProcess = true, Exported = true, Label = "TestService")]
public class TestService : Service
{
public override IBinder OnBind(Intent intent)
{
return null;
}
public override void OnCreate()
{
base.OnCreate();
}
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
Device.StartTimer(new TimeSpan(0, 0, 40), () =>
{
//Code executed every 40 seconds
});
base.OnStartCommand(intent, flags, startId);
return StartCommandResult.Sticky;
}
public override bool StopService(Intent name)
{
return base.StopService(name);
}
}
If I remove "IsolatedProcess = true" the service works but it will be stopped when I will close the application interface process.
I solved the issue by changing the value of the attribute IsolatedProcess to true, removing the Device.StartTimer instruction and by introducing a BroadcastReceiver.
MainActivity class:
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
public static Intent testServiceIntent;
protected override void OnCreate(Bundle savedInstanceState)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(savedInstanceState);
global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
testServiceIntent = new Intent(this.BaseContext, typeof(TestService));
LoadApplication(new App());
}
}
The service class:
[Service(IsolatedProcess = false, Exported = true, Label = "TestService")]
public class TestService : Service
{
System.Threading.Timer _timer;
public override IBinder OnBind(Intent intent)
{
return null;
}
public override void OnCreate()
{
base.OnCreate();
}
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
businessLogicMethod();
base.OnStartCommand(intent, flags, startId);
return StartCommandResult.Sticky;
}
public void businessLogicMethod()
{
//My business logic in a System.Threading.Timer
}
}
The Broadcast Receiver class:
[BroadcastReceiver]
[IntentFilter(new[] { Intent.ActionBootCompleted })]
public class TestApplicationBroadcastReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Log.Info("TestApp", "******* Loading Application *******");
try
{
if (intent.Action.Equals(Intent.ActionBootCompleted))
{
Intent service = new Intent(context, typeof(TestService));
service.AddFlags(ActivityFlags.NewTask);
context.StartService(service);
}
}
catch (Exception ex)
{
Log.Error("TestApp", "******* Error message *******: " + ex.Message);
}
}
}
I hope that can be useful for someone.
I'd like to create notificiation in my app, which is going to be showed in 10 seconds. It works well, when application is running, but when I close the application, notification is not showed. Here is my code:
My notification service:
[Service]
class NotifyEvent : IntentService
{
protected override void OnHandleIntent(Intent intent)
{
PendingIntent pIntent = PendingIntent.GetActivity(this, 0, intent, 0);
Notification.Builder builder = new Notification.Builder(this);
builder.SetContentTitle(Resources.GetString(Resource.String.NotifikaceNadpis));
builder.SetContentText(Resources.GetString(Resource.String.NotifikaceText));
builder.SetSmallIcon(Resource.Drawable.Icon);
builder.SetPriority(1);
builder.SetDefaults(NotificationDefaults.Sound | NotificationDefaults.Vibrate);
builder.SetWhen(Java.Lang.JavaSystem.CurrentTimeMillis());
Notification notifikace = builder.Build();
NotificationManager notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
const int notificationId = 0;
notificationManager.Notify(notificationId, notifikace);
}
}
Class, which starts notification:
public class Notificator
{
public void ShowNotification(Context context)
{
Intent intent = new Intent(context, typeof(NotifyEvent));
var pendingServiceIntent = PendingIntent.GetService(context, 0, intent, PendingIntentFlags.UpdateCurrent);
AlarmManager alarm = (AlarmManager)context.GetSystemService(Context.AlarmService);
alarm.Set(AlarmType.ElapsedRealtimeWakeup, SystemClock.ElapsedRealtime() + 10000, pendingServiceIntent);
}
}
Method in activity:
Notificator not = new Notificator();
not.ShowNotification(this);
My Activity:
[Activity(Label = "Nastavení")]
public class SettingsActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
SetContentView(Resource.Layout.Settings);
Button vynulovatButton = FindViewById<Button>(Resource.Id.buttonRestartDne);
vynulovatButton.Click += VynulovatDen;
}
...
protected void VynulovatDen(object sender, EventArgs e)
{
Notificator not = new Notificator();
not.ShowNotification(this);
}
}
Thanks for every help.
you can try this.
protected override void OnDestroy()
{
Notificator not = new Notificator();
not.ShowNotification(this);
base.OnDestroy();
}
You should keep your service alive when you destroy your application.
add return StartCommandResult.Sticky; in the OnStartCommand method.
start the service OnTaskRemoved function.
Create your service with the Service interface, the IntentService is for Time-consuming operation.
class NotifyEvent : Service
{
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
new Task(() => {
PendingIntent pIntent = PendingIntent.GetActivity(this, 0, intent, 0);
Notification.Builder builder = new Notification.Builder(this);
builder.SetContentTitle("hello");
builder.SetContentText("hello");
builder.SetSmallIcon(Resource.Drawable.Icon);
builder.SetPriority(1);
builder.SetDefaults(NotificationDefaults.Sound | NotificationDefaults.Vibrate);
builder.SetWhen(Java.Lang.JavaSystem.CurrentTimeMillis());
Notification notifikace = builder.Build();
NotificationManager notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
const int notificationId = 0;
notificationManager.Notify(notificationId, notifikace);
}).Start();
return StartCommandResult.Sticky;
}
public override IBinder OnBind(Intent intent)
{
return null;
}
public override void OnTaskRemoved(Intent rootIntent)
{
Intent restartService = new Intent(ApplicationContext, typeof(NotifyEvent));
restartService.SetPackage(PackageName);
var pendingServiceIntent = PendingIntent.GetService(ApplicationContext, 0, restartService, PendingIntentFlags.UpdateCurrent);
AlarmManager alarm = (AlarmManager)ApplicationContext.GetSystemService(Context.AlarmService);
alarm.Set(AlarmType.ElapsedRealtime, SystemClock.ElapsedRealtime() + 1000, pendingServiceIntent);
System.Console.WriteLine("service OnTaskRemoved");
base.OnTaskRemoved(rootIntent);
}
}
Hello, I want to build an app, in which you can start a service, which runs intependenly and creates a notification, and this service should constantly proof, if the DateTime.Now.Date is bigger than a spezific Date.
When I execute the code below, the notification gets displayed, but when I am closing the app, a few secondes later I get two times an information that the app crashed and I dont know why.
I cant even debug the code because this anly happens when the application is closed....
I hope you can help me thanks!
Here is my code:
namespace App
{
[Activity(Label = "App", MainLauncher = true, Icon = "#drawable/icon")]
public class MainActivity : Activity
{
int count = 1;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button = FindViewById<Button>(Resource.Id.MyButton);
button.Click += delegate {
button.Text = string.Format("{0} clicks!", count++);
StartService(new Intent(this, typeof(backgroudservice)));
};
}
}
public class backgroudservice : Service
{
public override IBinder OnBind(Intent intent)
{
return null;
}
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
newnotification("Title", "Text: ", 0);
new Task(() => {
DoWork();
Thread.Sleep(1000);
}).Start();
return StartCommandResult.Sticky;
}
public void DoWork()
{
if (DateTime.Now.Date > Convert.ToDateTime("2016-03-29").Date)
{
cancelnotification(0);
StopSelf();
}
}
public override void OnDestroy()
{
base.OnDestroy();
cancelnotification(0);
}
private void newnotification(string titel, string text, int id)
{
Notification.Builder builder = new Notification.Builder(this)
.SetContentTitle(titel)
.SetContentText(text)
.SetSmallIcon(Resource.Drawable.droidlogo_small)
.SetAutoCancel(false)
.SetVisibility(NotificationVisibility.Public)
.SetContentIntent(PendingIntent.GetActivity(this, 0, new Intent(this, typeof(MainActivity)), PendingIntentFlags.OneShot));
// Build the notification:
Notification notification = builder.Build();
notification.Flags = NotificationFlags.NoClear;
//notification.ContentIntent = new Intent(this,typeof(login));
// Get the notification manager:
NotificationManager notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
// Publish the notification:
notificationManager.Notify(id, notification);
}
private void cancelnotification(int id)
{
NotificationManager notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
notificationManager.Cancel(id);
}
}
}
I solved it, I forgot the [Service] above my class, now it works!
[Service]
public class backgroudservice : Service
{
...
}
You might try moving the call to cancelnotification in your service's OnDestroy to before the call to the base method, i.e.:
public override void OnDestroy()
{
cancelnotification(0);
base.OnDestroy();
}