问题
I am developing an Android app which behaves as Bluetooth peripheral role with a service.
When I start advertising, other Android devices searching for devices offering this service, can see my device (and can pair to it without pin) - ok.
But how to enable PIN pairing?
回答1:
You can force the device has to be paired, when using specific characteristics by protecting them with PERMISSION_READ_ENCRYPTED_MITM or PERMISSION_WRITE_ENCRYPTED_MITM.
The client/central side can force pairing by calling BluetoothDevice.creteBond().
The pairing method itself is determinated by the bluetooth protocol (see this thread)
回答2:
You dont actually require pairing to be done to transmit/receive data via ble, take a look into this tutorial
来源：https://stackoverflow.com/questions/40653579/android-ble-peripheral-with-pin-pairing