Android Question [solved] No Receiver alarm on some smartphones.

[voxel]

Hi,
By setting up a Receiver to launch a periodic task (for example, for testing every 30 minutes).

With a :
- Samsung Galaxy A13 / Android 14: alarm OK every 30 minutes
- Xiaomi Redmi A3 / Android 15: alarm KO

I have the impression that the Receiver's behavior is erratic. Is this a restriction on Android 15?

Have you ever encountered this type of problem? (i use SDK 36)

AddManifestText(
<uses-sdk android:minSdkVersion="28" android:targetSdkVersion="36"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
SetApplicationAttribute(android:usesCleartextTraffic, "true")
AddPermission(android.permission.POST_NOTIFICATIONS)
AddPermission(android.permission.RECEIVE_BOOT_COMPLETED)
AddReceiverText(ReceiverNotification, <intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>)
'End of default text.
SetApplicationAttribute(android:theme, "@style/LightTheme")
CreateResource(values, theme.xml,
<resources>
    <style
        name="LightTheme" parent="@android:style/Theme.Material.Light">
       <item name="android:actionMenuTextAppearance">@style/LowerCaseMenu</item>
       <item name="android:windowOptOutEdgeToEdgeEnforcement">true</item>
       <item name="android:windowTranslucentNavigation">false</item>
       <item name="android:windowTranslucentStatus">true</item>
       <item name="android:forceDarkAllowed">false</item>
    </style>
     <style name="LowerCaseMenu" parent="android:TextAppearance.Material.Widget.ActionBar.Menu">
        <item name="android:textAllCaps">false</item>
    </style>
</resources>
)

Sub Process_Globals
   
   
End Sub

Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)
   
    Log("Service démarré")
   
    'code download + display notification

    ScheduleNextDownload
   
End Sub

Sub ShowNotification(titre As String,detail As String)
   
    Log("Lancement notification")
   
    Dim n As Notification
    n.Initialize2(n.IMPORTANCE_HIGH)
    n.Icon = "icon_notif"
    n.AutoCancel = True
   
    n.SetInfo2(titre,detail,"",Main)
   
    n.Notify(1)
   
End Sub


Sub ScheduleNextDownload
   
    CancelScheduledService(Me)

    Log("Initialise StartReceiverAt")
   
    Dim target As Long = DateTime.Now + DateTime.TicksPerMinute * 30
    Log("Prochain téléchargement planifié pour : " & DateTime.Date(target) & "-" & DateTime.Time(target))
    StartReceiverAt(Me, target, True)
   
   
End Sub

 

[Erel]

Try this: https://www.b4x.com/android/forum/threads/start-receiver-at-exact-time.148185/#content
And increase the interval. 30 minutes might be too short.

 

[voxel]

I changed to setting an alarm once a day at 12:00 PM, without using "exact time," and it works for both smartphones.
- With the Samsung, when I wake it up from sleep mode, the notification appears immediately.
- With the Xiaomi, when I wake it up from sleep mode, the notification appears after a few minutes.
Thanks.

Sub ScheduleNextDownload
 
    CancelScheduledService(ServiceNotification)

    Log("Initialise StartReceiverAt")
 
    Dim now As Long = DateTime.Now
    Dim today As String = DateTime.Date(now)
    Dim target As Long = DateTime.DateTimeParse(today, "12:00:00")
    If target < now Then target = target + DateTime.TicksPerDay
 
    StartReceiverAt(ReceiverNotification, target, False)
 
End Sub

Now, I have another problem: my Receiver starts a (quick) download, and since the smartphone is asleep, there's a connection failure :-( (the notification does indeed show a connection failure). Do you have any ideas on how to solve this problem?
Is there a way to "wake up" the smartphone to maintain the HTTP connection?
Do I need to launch the Receiver more often to have a chance of the smartphone not going to sleep?
Should I stop using a Receiver and use a Service?

I'm really wondering if I should use notifications with Firebase instead; it seems more reliable to me (and perhaps simpler when I port this feature to B4i).

 

[Brian Dean]

Now, I have another problem:

Yes - you do. And it has nothing to do with the title of this thread. You should start a new thread.

 

[wes58]

Yes - you do. And it has nothing to do with the title of this thread. You should start a new thread.

After so many years people are still doing this! What are you? Are you a Forum Police? Are you a Forum Owner/Moderator?
If you don't have an answer to his problem why do you bother.
It is his thread and it relates to what he is trying to achieve and has problem with - i.e. receivers. He (and probably many other users) would like to have a response to the issues they have in one thread.

 

[voxel]

I will create a new thread

 

[josejad]

After so many years people are still doing this!

Respect the forum guidelines you've never read? Yes, we do! This way, the forum is easier to read. Imagine a thread about receivers with 90 posts about them. Should someone read all of them to find their answer? Or it would be easier to find a post with a title like “Download resources from a receiver”?

But this is Erel's forum so you have to (try) to follow the rules.