Android Question Automatic launch of MyLocation after reboot.

AndreyPozdnyakov · Mar 30, 2024

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!

B4X:

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

Let's start the timer.

B4X:

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.

B4X:

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 · Mar 31, 2024

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 · Mar 31, 2024

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 · Mar 31, 2024

Erel said:
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 · Apr 1, 2024

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:

B4X:

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:

B4X:

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

4. Receiver Module MyReceiver:

B4X:

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 · Apr 1, 2024

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 · Apr 1, 2024

It should work with all Android versions.

Check the logs.

AndreyPozdnyakov · Apr 1, 2024

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

AndreyPozdnyakov · Apr 1, 2024

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

AndreyPozdnyakov · Apr 1, 2024

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 · Apr 2, 2024

Create a small project and upload it.

AndreyPozdnyakov · Apr 2, 2024

Erel said:
Create a small project and upload it.

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

Erel · Apr 3, 2024

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

AndreyPozdnyakov · Apr 3, 2024

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

Added a log message.

B4X:

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 · Apr 4, 2024

I've changed StartupReceiver code to:

B4X:

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 · Apr 4, 2024

Erel said:
I've changed StartupReceiver code to:

B4X:

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 · Apr 7, 2024

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

Check the device settings.

Android Question Automatic launch of MyLocation after reboot.

AndreyPozdnyakov

Member

AndreyPozdnyakov

Member

Erel

B4X founder

AndreyPozdnyakov

Member

AndreyPozdnyakov

Member

AndreyPozdnyakov

Member

Erel

B4X founder

AndreyPozdnyakov

Member

AndreyPozdnyakov

Member

AndreyPozdnyakov

Member

Erel

B4X founder

AndreyPozdnyakov

Member

Attachments

Erel

B4X founder

AndreyPozdnyakov

Member

Erel

B4X founder

AndreyPozdnyakov

Member

Erel

B4X founder

Similar Threads

Android Question Automatic launch of MyLocation after reboot.

Member

Member

B4X founder

Member

Member

Member

B4X founder

Member

Member

Member

B4X founder

Member

Attachments

B4X founder

Member

B4X founder

Member

B4X founder

Similar Threads

Privacy & Transparency

Privacy & Transparency