android - 配对过程后蓝牙 BLE 设备未绑定

Question

我正在研究BLE，要求如下：

有一个从我的本地数据库加载的设备列表。

在点击特定设备或行时，我必须检查设备是否已绑定，如果已绑定，我必须导航到特定屏幕。如果未绑定，则配对对话框将成功打开，我还可以输入密码以配对该 BLE 设备。

但问题是在输入正确的 Pair 密码后，我无法在广播接收器中获得 BLE 设备的 BONDED 状态，如下所示：

（注意：我们知道如果 BLE 未绑定并且我们尝试连接，则配对对话框将自动打开。）

请检查以下代码：

 private fun initializeBluetoothBroadcastReceiver() {
    bluetoothBroadCastReceiver= object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            Log.e("%%%%% ", "%%%%% inside onreceive")
            val action = intent.action
            if (action == BluetoothAdapter.ACTION_STATE_CHANGED) {
                Log.e("%%%%% ", "%%%%% inside ACTION_STATE_CHANGED")
                if (bleManager.bluetoothGatt?.device?.bondState == BluetoothDevice.BOND_BONDED) {
                    Log.e("%%%%% ", "%%%%% inside BOND_BONDED")
                    if (isBleDeviceConnected) {
                        Log.e("%%%%% ", "%%%%% inside isBleDeviceConnected")
                        bleManager.bluetoothGattCallback?.writeTime()
                        loadBatteryStatusFragement(false)
                    }
                }else{
                    Log.e("%%%%% ", "%%%%% inside not BOND_BONDED")
                }
            }else{
                Log.e("%%%%% ", "%%%%% inside ACTION_STATE_CHANGED ELSE")
            }
        }
    }
    val filter1 = IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)
    filter1.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED)
    registerReceiver(bluetoothBroadCastReceiver, filter1)
}

因此，如果 BLE 设备未配对，如果我正在尝试，那么 - > 配对弹出窗口正在打开，并且在成功输入密码后，我得到以下日志：

%%%%%: %%%%% inside onreceive
%%%%%: %%%%% inside ACTION_STATE_CHANGED ELSE

并且没有进入BOND_BONDED

可能是什么问题？谢谢。

标签： androidbluetoothbluetooth-lowenergybroadcastreceiverandroid-bluetooth

Answer 1

使用的 FLAG 存在问题。

而不是使用这个标志：ACTION_STATE_CHANGED

if (action == BluetoothAdapter.ACTION_STATE_CHANGED) {

我们必须使用这个标志：ACTION_BOND_STATE_CHANGED

if (action == BluetoothDevice.ACTION_BOND_STATE_CHANGED) {

解决的代码如下：

private fun initializeBluetoothBroadcastReceiver() {
    bluetoothBroadCastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            val action = intent.action
            if (action == BluetoothDevice.ACTION_BOND_STATE_CHANGED) {
                if (bleManager.bluetoothGatt?.device?.bondState == BluetoothDevice.BOND_BONDED) {
                    if(isBleDeviceConnected)
                    {
                        performNecessaryAction()
                    }else{
                        showConnectionFailedDialog()
                    }

                } else if (bleManager.bluetoothGatt?.device?.bondState == BluetoothDevice.BOND_NONE) {
                    try {
                        isBleDeviceConnected = false
                        DialogUtils.showPairingFailedDialog(
                            this@HomeActivity,
                            objLanguageJson?.error_message?.err_battery_pairing_failed
                        )
                        performNecessaryAction()
                    } catch (e: Exception) {
                        e.printStackTrace()
                    }
                } else if (bleManager.bluetoothGatt?.device?.bondState == BluetoothDevice.BOND_BONDING) {
                    Log.e("%%%%% ", "%%%%% bonding none")
                }
            } else if (action == BluetoothAdapter.ACTION_STATE_CHANGED) {
                val state =
                    intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR)
                Log.e("%%%%% ", "%%%%% state name >>> " + state)
                when (state) {
                    BluetoothAdapter.STATE_OFF -> {
                        Log.e("%%%%% ", "%%%%% bluetooth turns off ")
                        val bluetoothAdapter: BluetoothAdapter =
                            BluetoothAdapter.getDefaultAdapter()
                        val isEnabled: Boolean = bluetoothAdapter.isEnabled
                        if (!isEnabled) {
                            bluetoothAdapter.enable()
                        }
                        if (isBleDeviceConnected) {
                            isBleDeviceConnected = false
                           
                    BluetoothAdapter.STATE_TURNING_OFF -> {

                    }
                    BluetoothAdapter.STATE_ON -> {
                    }
                    BluetoothAdapter.STATE_TURNING_ON -> {
                    }
                }
            }
        }
    }

    val filter = IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED)
    filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED)
    registerReceiver(bluetoothBroadCastReceiver, filter)
}