Android Question How to close an app or disconnect bluetooth

[Altra]

Great software! Have been able to do quite a bit without asking questions, thanks to this forum and it's contributors

Is there any way to add a click event to disconnect or stop the bluetooth service in the B4A code from post number one in link?

https://www.b4x.com/android/forum/threads/hc-05-classic-bluetooth.66677/

I have few variations of the same application on the phone. I run into problems switching between the apps. The OS will stay connected or try to reconnect to the last one that was open. The newly opened app can't connect and keeps searching.

Thanks

Add:
Found some more info. Would this be a good way to disconnect bluetooth?

In main

Sub btnDisconnect_Click
    CallSub(Starter, "Service_Destroy")
End Sub

In starter

Sub Service_Destroy
    Serial.Disconnect + AStream.Close.
End Sub

 

[Erel]

Found some more info. Would this be a good way to disconnect bluetooth?

No. Never call Service_Destroy directly.

See the tutorial: Android Bluetooth / BluetoothAdmin Tutorial
This is the best structure. Call Starter.Manager.Disconnect.

 

[Altra]

Thanks for your reply.

I'll study the tutorial you referenced and see how to integrate AsyncStreamsText

While waiting for help, I found in the original HC-5 classic code. The sub "Activity_Pause" was empty. So when exiting the application the Astreams remained running.

I added this to the Main section

Sub Activity_Pause (UserClosed As Boolean) 'modified
    If UserClosed Then
        CallSub(Starter, "AST_Close_Starter")
    End If
End Sub

And in the Starter section this

Sub AST_Close_Starter
    ast.Close
    connected = False
    CallSub(Main, "SetState")
End Sub

Now when I exit the app it disconnects the bluetooth. Not sure if this is the best way. Attached is full project.

 

[Erel]

Now when I exit the app it disconnects the bluetooth. Not sure if this is the best way

It all depends on your requirements. If you want the connection to end when the activity is paused then it is a good solution. In many cases it is simpler not to tie the connection to the activity life cycle and never close it.