Android Question Bluetooth search stops working after moving to b4xPage

[luki_c]

I used the example of chat bluetootch, when I moved the layout to separate panels the program stopped detecting and indexing bluetooth devices. The program code is the same as in the example.

Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
    
    p1.Initialize()
    B4XPages.AddPageAndCreate("pg1",p1)
    
    p2.Initialize()
    B4XPages.AddPageAndCreate("pg2",p2)

    p3.Initialize()
    B4XPages.AddPageAndCreate("pg3",p3)
    
    WM1.SetTabTextIcon(1,title(0),Chr(0xF009),Typeface.FONTAWESOME)
    WM1.SetTabTextIcon(2,title(1),Chr(0xF0CA),Typeface.FONTAWESOME)
    WM1.SetTabTextIcon(3,title(2),Chr(0xF294),Typeface.FONTAWESOME) 'BT
    
    pagecont.AddPage(p2.p,"")
    pagecont.AddPage(p1.pMqtt,"")
    pagecont.AddPage(p3.pnl,"")
    
    AHViewPager1.PageContainer = pagecont
    AHViewPager1.CurrentPage = 1

    'StartBluetooth
    
End Sub

Sub Class_Globals
    Private Root As B4XView 'ignore
    Private xui As XUI 'ignore
    
    Private btnAllowConnection As B4XView
    Private btnSearchForDevices As B4XView
    
    Private rp As RuntimePermissions
    Private AStream As AsyncStreams
    Public serial As Serial
    Public admin As BluetoothAdmin
    Type NameAndMac (Name As String, Mac As String)
    Public BluetoothState, ConnectionState As Boolean
'    Private ChatPage1 As ChatPage

    Private phone As Phone
    Private ion As Object
    
    Private AnotherProgressBar1 As AnotherProgressBar
    Private CLV As CustomListView
    
    Public pnl As B4XView
    
End Sub

'You can add more parameters here.
Public Sub Initialize As Object

    admin.Initialize("admin")
    serial.Initialize("serial")
        Return Me
End Sub

'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    'load the layout to Root
    Root.LoadLayout("bt")
    pnl = Root
    
    
    StartBluetooth
    
End Sub

'You can see the list of page related events in the B4XPagesManager object. The event name is B4XPage.



public Sub StartBluetooth
    If admin.IsEnabled = False Then
        Wait For (EnableBluetooth) Complete (Success As Boolean)
        If Success = False Then
            ToastMessageShow("Failed to enable bluetooth", True)
        End If
    End If
    BluetoothState = admin.IsEnabled
    StateChanged
End Sub

Private Sub EnableBluetooth As ResumableSub
    ToastMessageShow("Enabling Bluetooth adapter...", False)
    Dim p As Phone
    If p.SdkVersion >= 31 Then
        rp.CheckAndRequest("android.permission.BLUETOOTH_CONNECT")
        Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
        If Result = False Then Return False
        If p.SdkVersion >= 33 Then
            Dim in As Intent
            in.Initialize("android.bluetooth.adapter.action.REQUEST_ENABLE", "")
            StartActivityForResult(in)
            Wait For ion_Event (MethodName As String, Args() As Object)
            Return admin.IsEnabled
        End If
    End If
    Return admin.Enable
End Sub

Private Sub StartActivityForResult(i As Intent)
    Dim jo As JavaObject = GetBA
    ion = jo.CreateEvent("anywheresoftware.b4a.IOnActivityResult", "ion", Null)
    jo.RunMethod("startActivityForResult", Array As Object(ion, i))
End Sub

Sub GetBA As Object
    Dim jo As JavaObject = Me
    Return jo.RunMethod("getBA", Null)
End Sub



Private Sub Admin_StateChanged (NewState As Int, OldState As Int)
    Log("state changed: " & NewState)
    BluetoothState = NewState = admin.STATE_ON
    StateChanged
End Sub


Sub btnSearchForDevices_Click
    
        Log("btn Search")
    rp.CheckAndRequest(rp.PERMISSION_ACCESS_FINE_LOCATION)
    Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
    If Result = False And rp.Check(rp.PERMISSION_ACCESS_COARSE_LOCATION) = False Then
        ToastMessageShow("No permission...", False)
        Return
    End If
    If phone.SdkVersion >= 31 Then
        For Each Permission As String In Array("android.permission.BLUETOOTH_SCAN", "android.permission.BLUETOOTH_CONNECT")
            rp.CheckAndRequest(Permission)
            Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
            If Result = False Then
                ToastMessageShow("No permission...", False)
                Return
            End If
        Next
    End If

    Dim success As Boolean = admin.StartDiscovery
    If success = False Then
        ToastMessageShow("Error starting discovery process.", True)
    Else
        
        Log($"succes ${success}"$)
        
        CLV.Clear
        Dim Index As Int = ShowProgress
        Wait For Admin_DiscoveryFinished
        HideProgress(Index)
        If CLV.Size = 0 Then
            ToastMessageShow("No device found.", True)
        End If
    End If
End Sub

Sub btnAllowConnection_Click
    
    Log("BTN allow klik")
    
    If phone.SdkVersion >= 31 Then
        rp.CheckAndRequest("android.permission.BLUETOOTH_CONNECT")
        Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
        If Result = False Then
            ToastMessageShow("No permission...", False)
            Return
        End If
    End If
    'this intent makes the device discoverable for 300 seconds.
    Dim i As Intent
    i.Initialize("android.bluetooth.adapter.action.REQUEST_DISCOVERABLE", "")
    i.PutExtra("android.bluetooth.adapter.extra.DISCOVERABLE_DURATION", 300)
    StartActivity(i)
    serial.Listen
End Sub



Public Sub SendMessage (msg As String)
    AStream.Write(msg.GetBytes("utf8"))
End Sub

Private Sub AStream_NewData (Buffer() As Byte)
'    ChatPage1.NewMessage(BytesToString(Buffer, 0, Buffer.Length, "UTF8"))
    Log(BytesToString(Buffer, 0, Buffer.Length, "UTF8"))
End Sub

Private Sub AStream_Error
    ToastMessageShow("Connection is broken.", True)
    ConnectionState = False
    StateChanged
End Sub

Private Sub AStream_Terminated
    AStream_Error
End Sub

Public Sub Disconnect
    If AStream.IsInitialized Then AStream.Close
    serial.Disconnect
End Sub

Private Sub Admin_DeviceFound (Name As String, MacAddress As String)
    Log(Name & ":" & MacAddress)
    Dim nm As NameAndMac = CreateNameAndMac(Name, MacAddress)
    CLV.AddTextItem($"${nm.Name}: ${nm.Mac}"$, nm)
End Sub

Private Sub StateChanged
    Log("State changed")
    
    btnSearchForDevices.Enabled = BluetoothState
    btnAllowConnection.Enabled = BluetoothState
'    ChatPage1.btnSend.Enabled = ConnectionState
End Sub

Sub CLV_ItemClick (Index As Int, Value As Object)
    Dim nm As NameAndMac = Value
    ToastMessageShow($"Trying to connect to: ${nm.Name}"$, True)
    serial.Connect(nm.Mac)
    Dim Index As Int = ShowProgress
    Wait For Serial_Connected (Success As Boolean)
    HideProgress(Index)
    If Success = False Then
        Log(LastException.Message)
        ToastMessageShow("Error connecting: " & LastException.Message, True)
    Else
        AfterSuccessfulConnection
    End If
    StateChanged
End Sub

'will be called when a client connects to this device
Sub Serial_Connected (Success As Boolean)
    If Success Then
        AfterSuccessfulConnection
        StateChanged
    End If
End Sub

Sub AfterSuccessfulConnection
    If AStream.IsInitialized Then AStream.Close
    'prefix mode! Change to non-prefix mode if communicating with non-B4X device.
    AStream.InitializePrefix(serial.InputStream, False, serial.OutputStream, "astream")
    ConnectionState = True
    Log($"Connection state ${ConnectionState}"$)
'    If AHViewPager1.CurrentPage <> 1 Then
'        WM1_Tab1Click
'    End If
'    B4XPages.ShowPage("Chat Page")
End Sub

Sub ShowProgress As Int
    AnotherProgressBar1.Tag = AnotherProgressBar1.Tag + 1
    AnotherProgressBar1.Visible = True
    Return AnotherProgressBar1.Tag
End Sub

Sub HideProgress (Index As Int)
    If Index = AnotherProgressBar1.Tag Then
        AnotherProgressBar1.Visible = False
    End If
End Sub

Public Sub CreateNameAndMac (Name As String, Mac As String) As NameAndMac
    Dim t1 As NameAndMac
    t1.Initialize
    t1.Name = Name
    t1.Mac = Mac
    Return t1
End Sub

Private Sub B4XPage_Appear
    CLV.Clear
End Sub

 

[Erel]

The relevant example is this one: [B4XPages] Bluetooth Chat Example

Try it without AHViewPager and AHPageContainer. Show the Bluetooth page with B4XPages.ShowPage.

 

[luki_c]

Try it without AHViewPager and AHPageContainer. Show the Bluetooth page with B4XPages.ShowPage.

The search stopped working when I placed the pages in the container. Previously when the program was in mainfom I had no problem with it.

 

[Erel]

I'm not really familiar with AHViewPager but it doesn't look like you are using it correctly.
It doesn't expect a B4XPage as a "tab page".

 

[luki_c]

sorry if my questions are tiresome, I moved some of the code responsible for permissions to mainform, I did some additional logs to identify the problem:

Sub btnSearchForDevices_Click
    
    Log("btn Search")
    B4XPages.MainPage.rp.CheckAndRequest(B4XPages.MainPage.rp.PERMISSION_ACCESS_FINE_LOCATION)
    Log("-1")
    
    
    Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
'    Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
    
    Log("0")

It turns out that the program stops at the permission check point after clicking on search for devices

Here is the list of permissions

 

[luki_c]

I launched the application, placed all functions that require consents in the B4XMainPage main module. I used this tutorial

Runtime Permissions (Android 6.0+ Permissions)

1. Edit: In B4XPages the permission result event signature is: Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean) 2. Important to read: https://www.b4x.com/android/forum/threads/android-jar-targetsdkversion-minsdkversion.87610/#content If the targetSdkVersion is...

www.b4x.com

Thank you for your help!

 

[Erel]

1. Please post logs and code as text. Not screenshots.

2. Start with this example: [B4XPages] Bluetooth Chat Example
It works.