Android Question how to detect BLE Bond states / Intents ?

R

RushilD

Member
Licensed User
Hello,

I need a small help to detect the BOND states of the ble device.

I want to detect if the the ble device is bonded successfully with the device or not

I found few posts on the forums and did the following but unfortunately it does not work as intended

I added the following in the manifest file
B4X: 
AddReceiverText(BTPair,
<intent-filter>
<action android:name="android.bluetooth.device.action.BOND_STATE_CHANGED"/>
<action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
<action android:name="android.bluetooth.device.action.BOND_BONDING" />
<action android:name="android.bluetooth.device.action.BOND_BONDED" />
</intent-filter>
)

I created a service module named "BTPair" and added the following

B4X: 
Sub Service_Start (StartingIntent As Intent)
    Log (StartingIntent)
    If StartingIntent.Action = "android.bluetooth.device.action.BOND_STATE_CHANGED" Then
Log("BOND STATE CHANGES")

    Else If StartingIntent.Action = "android.bluetooth.device.action.PAIRING_REQUEST" Then
        Log("PAIRING REQUEST")
    Else If StartingIntent.Action = "android.bluetooth.device.action.BOND_BONDING" Then
        Log("BONDING")
    Else If StartingIntent.Action = "android.bluetooth.device.action.BOND_BONDED" Then
        Log("BOND BONDED")
    End If
  
End Sub


I do the following
1. Scan for BLE devices
2. The App reads a secure characteristics and the OS generates a popup to pair the device

B4X: 
(Intent) Intent { act=android.bluetooth.device.action.BOND_STATE_CHANGED flg=0x10 (has extras) }
Bundle[{android.bluetooth.device.extra.PREVIOUS_BOND_STATE=10, android.bluetooth.device.extra.DEVICE=AC:67:B2:4A:4D:9A, android.bluetooth.device.extra.BOND_STATE=11}]
** Receiver (btpair) OnReceive **
*** Service (btpair) Create ***
** Service (btpair) Start **
(Intent) Intent { act=android.bluetooth.device.action.PAIRING_REQUEST flg=0x11000010 cmp=b4a.example/.btpair$btpair_BR (has extras) }
PAIRING REQUEST

3. After entering the Pairing KEY I only see the intent log
B4X: 
(Intent) Intent { act=android.bluetooth.device.action.BOND_STATE_CHANGED flg=0x10 (has extras) }
Bundle[{android.bluetooth.device.extra.PREVIOUS_BOND_STATE=11, android.bluetooth.device.extra.DEVICE=8C:AA:B5:B5:EC:DA, android.bluetooth.device.extra.BOND_STATE=12}]

But no other logs for example " BOND BONDED"


Any idea what is wrong ?
 
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R

RushilD

Member
Licensed User
Erel said:
First step is to switch from a service to a receiver: https://www.b4x.com/android/forum/threads/receivers-and-services-in-2023.145370/#content
Click to expand...

I changed from service to receiver

B4X: 
'Called when an intent is received.
'Do not assume that anything else, including the starter service, has run before this method.
Private Sub Receiver_Receive (FirstTime As Boolean, StartingIntent As Intent)
    Log (StartingIntent)
    If StartingIntent.Action = "android.bluetooth.device.action.BOND_STATE_CHANGED" Then
        Log("BOND STATE CHANGES")

    Else If StartingIntent.Action = "android.bluetooth.device.action.PAIRING_REQUEST" Then
        Log("PAIRING REQUEST")
    Else If StartingIntent.Action = "android.bluetooth.device.action.BOND_BONDING" Then
        Log("BONDING")
    Else If StartingIntent.Action = "android.bluetooth.device.action.BOND_BONDED" Then
        Log("BOND BONDED")
    End If
End Sub

But I still only see the log for pairing request no other logs are generated

B4X: 
(Intent) Intent { act=android.bluetooth.device.action.BOND_STATE_CHANGED flg=0x10 (has extras) }
Bundle[{android.bluetooth.device.extra.PREVIOUS_BOND_STATE=10, android.bluetooth.device.extra.DEVICE=AC:67:B2:4A:4D:9A, android.bluetooth.device.extra.BOND_STATE=11}]
** Receiver (btpair) OnReceive **
*** Service (btpair) Create ***
** Service (btpair) Start **
(Intent) Intent { act=android.bluetooth.device.action.PAIRING_REQUEST flg=0x11000010 cmp=b4a.example/.btpair$btpair_BR (has extras) }
PAIRING REQUEST

After entering the pairing key

B4X: 
(Intent) Intent { act=android.bluetooth.device.action.BOND_STATE_CHANGED flg=0x10 (has extras) }
Bundle[{android.bluetooth.device.extra.PREVIOUS_BOND_STATE=11, android.bluetooth.device.extra.DEVICE=8C:AA:B5:B5:EC:DA, android.bluetooth.device.extra.BOND_STATE=12}]
 
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