Android，如何将BLE设备配对(绑定)?

Question

在GATT之前，createRfcommSocketToServiceRecord,createInsecureRfcommSocketToServiceRecord

方法可以使设备配对，

但是GATT没有关于配对设备的选项，只使用BluetoothDevice.connectGatt(…)

如果设备已连接，我想创建一个配对设备。

thx .

Answer 1

据我所知，在BLE中启动配对过程有两种方式:

1)从API 19开始，你可以通过调用mBluetoothDevice.createBond()来开始配对。您无需连接远端BLE设备即可启动配对过程。

2)当您尝试执行Gatt操作时，让我们以

方法为例

mBluetoothGatt.readCharacteristic(characteristic)

如果远程BLE设备需要绑定以进行任何通信，则当回调

onCharacteristicRead( BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status)

被调用，其status参数值将等于GATT_INSUFFICIENT_AUTHENTICATION或GATT_INSUFFICIENT_ENCRYPTION，而不等于GATT_SUCCESS。如果发生这种情况，配对过程将自动启动。

下面是一个例子，当onCharacteristicRead回调被调用时，它什么时候失败

@Override
public void onCharacteristicRead(
        BluetoothGatt gatt,
        BluetoothGattCharacteristic characteristic,
        int status)
{
    if(BluetoothGatt.GATT_SUCCESS == status)
    {
        // characteristic was read successful
    }
    else if(BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION == status ||
            BluetoothGatt.GATT_INSUFFICIENT_ENCRYPTION == status)
    {
        /*
         * failed to complete the operation because of encryption issues,
         * this means we need to bond with the device
         */
        /*
         * registering Bluetooth BroadcastReceiver to be notified
         * for any bonding messages
         */
        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
        mActivity.registerReceiver(mReceiver, filter);
    }
    else
    {
        // operation failed for some other reason
    }
}

有人提到这个操作会自动启动配对过程:Android蓝牙低功耗配对

接收器是这样实现的

private final BroadcastReceiver mReceiver = new BroadcastReceiver()
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        final String action = intent.getAction();
        if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED))
        {
            final int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
            switch(state){
                case BluetoothDevice.BOND_BONDING:
                    // Bonding...
                    break;
                case BluetoothDevice.BOND_BONDED:
                    // Bonded...
                    mActivity.unregisterReceiver(mReceiver);
                    break;
                case BluetoothDevice.BOND_NONE:
                    // Not bonded...
                    break;
            }
        }
    }
};