Android Question Automatic launch of MyLocation after reboot.

[AndreyPozdnyakov]

Is it possible for an application like MyLocation to automatically continue running after the device is rebooted?

For testing, we will add a timer to the Starter service module. We are not changing anything else in MyLocation!

Sub Process_Globals
    Private Timer_Starter As Timer
    Dim Bp As Beeper
End Sub

Let's start the timer.

Sub Service_Create
    Timer_Starter.Initialize("Timer_Starter", 5000)
    Timer_Starter.Enabled = True
    Bp.Initialize(50, 400)
End Sub

The timer will work even if you turn off the device.

Sub Timer_Starter_Tick
    Log("Timer_Starter_Tick")
    Bp.Beep
End Sub

But if the device is rebooted, the timer will continue to work only if the application is forced to start.

How, then, do applications that receive notifications from the developer server work after a reboot, for example?

 

[AndreyPozdnyakov]

The question can be put differently.
How to modify the MyLocation application so that it becomes an autostart application, i.e. activated with the system?

 

[Erel]

You can add a receiver module and start it with the BOOT_COMPLETION intent: https://www.b4x.com/android/forum/threads/receivers-and-services-in-2023.145370/#content

You cannot start a foreground service. So your app will not be able to start and run indefinitely.

 

[AndreyPozdnyakov]

You can add a receiver module and start it with the BOOT_COMPLETION intent: https://www.b4x.com/android/forum/threads/receivers-and-services-in-2023.145370/#content

You cannot start a foreground service. So your app will not be able to start and run indefinitely.

Thank you very much, Mr. Erel!

 

[AndreyPozdnyakov]

I tried to create an example of work after rebooting the device and, like John Naylor, I was confused.

The example is extremely simple.

1. I have Android 13.

2. Manifest Contents:

AddManifestText(
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="33"/>
<supports-screens android:largeScreens="true"
     android:normalScreens="true"
     android:smallScreens="true"
     android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
CreateResourceFromFile(Macro, Themes.LightTheme)
'End of default text.

AddPermission(android.permission.RECEIVE_BOOT_COMPLETED)
AddReceiverText(StartupReceiver, <intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>)

3. Receiver Module StartupReceiver:

Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)
StartReceiverAt(MyReceiver, DateTime.Now + 15 * DateTime.TicksPerMinute, True)
End Sub

4. Receiver Module MyReceiver:

Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)

Log("MyReceiver is working!")

Dim n As Notification
n.Initialize
n.Icon = "icon"
n.SetInfo("Test", "Receiver fired - " & cnt, Main)
n.Notify (1)
cnt = cnt + 1
End Sub

That's it, there is nothing else in the Project.
The only goal of the Project: after rebooting the device, receive the intent and call MyReceiver.

I need to make sure that MyReceiver is working in order to perform the actions I need in it.
It would be quite enough for me to send a Notify to the client.

But this doesn't happen. What is the problem?

 

[AndreyPozdnyakov]

I checked it on another device with Android 7.1.1. Everything is working.
What to do on a device with Android 13 and higher?

 

[Erel]

It should work with all Android versions.

Check the logs.

 

[AndreyPozdnyakov]

But Notification does not really arrive on the device with Android 13.

 

[AndreyPozdnyakov]

Even Beeper doesn't work in MyReceiver. In other words, the StartupReceiver module does not receive an intent after a reboot

 

[AndreyPozdnyakov]

Tested on 3 different operating systems.
Bottom line: it works on Android 7, but it doesn’t work on Android 8 and Android 13.

 

[Erel]

Create a small project and upload it.

 

[AndreyPozdnyakov]

Create a small project and upload it.

I'm sending it for verification. Thank you very much in advance.

 

[Erel]

First step is to understand whether StartupReceiver is started or not. Add some log messages.

 

[AndreyPozdnyakov]

First step is to understand whether StartupReceiver is started or not. Add some log messages.

Added a log message.

Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)

    Log ("StartupReceiver is working!")

    StartReceiverAt(MyReceiver, DateTime.Now + 15 * DateTime.TicksPerMinute, True)

End Sub

As before: on Android 7 there is logging, on Android 8 or Android 13 there is no logging.

 

[Erel]

I've changed StartupReceiver code to:

Sub Process_Globals

End Sub

Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)
    Log("StartupReceiver")
End Sub

Ran the app in release mode.
Restart the device.
And I see in the logs:
*** Receiver (startupreceiver) Receive (first time) ***
StartupReceiver

Tested on Android 14.

 

[AndreyPozdnyakov]

I've changed StartupReceiver code to:

Sub Process_Globals

End Sub

Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)
    Log("StartupReceiver")
End Sub

Ran the app in release mode.
Restart the device.
And I see in the logs:
*** Receiver (startupreceiver) Receive (first time) ***
StartupReceiver

Tested on Android 14.

I do not understand anything.
You just removed StartReceiverAt and didn't change anything else.

I updated to Android 13 today (HyperOS on Xiaomi) and now it works.
But it still doesn't work on another Android 8 device.

What's the matter here?

 

[Erel]

Some devices prevent apps from running at startup. Sometimes it is called "fast boot".

Check the device settings.