Android Bluetooth Paring Input Device -

i trying make pairing code , works normal devices. if use bluetooth scanner pairs device doesn't work till go android settings , select input device checkbox. how can code?

thank you.

here pairing code:

public static bluetoothsocket createl2capbluetoothsocket(string address, int psm){     return createbluetoothsocket(type_l2cap, -1, false,false, address, psm); } // method creating bluetooth client socket private static bluetoothsocket createbluetoothsocket(         int type, int fd, boolean auth, boolean encrypt, string address, int port){     try {         constructor<bluetoothsocket> constructor = bluetoothsocket.class.getdeclaredconstructor(                 int.class, int.class,boolean.class,boolean.class,string.class, int.class);         constructor.setaccessible(true);         bluetoothsocket clientsocket = (bluetoothsocket)                 constructor.newinstance(type,fd,auth,encrypt,address,port);         return clientsocket;     }catch (exception e) { return null; } }  private void dopair(final bluetoothdevice device, final int devicetag) {     try {         method method = device.getclass().getmethod("createbond",                 (class[]) null);         method.invoke(device, (object[]) null);     } catch (exception e) {         log.e(log_tag, "cannot pair device", e);     }      broadcastreceiver mreceiver = new broadcastreceiver() {          @override         public void onreceive(context context, intent intent) {             string action = intent.getaction();              if (bluetoothdevice.action_bond_state_changed.equals(action)) {                 final int state = intent.getintextra(                         bluetoothdevice.extra_bond_state,                         bluetoothdevice.error);                 final int prevstate = intent.getintextra(                         bluetoothdevice.extra_previous_bond_state,                         bluetoothdevice.error);                  if (state == bluetoothdevice.bond_bonded                         && prevstate == bluetoothdevice.bond_bonding) {                     log.d(log_tag, "paired new device");                     if (listener != null) {                         listener.onbluetoothpaireddevicechange(bluetoothadapter                                 .getbondeddevices().iterator().next()                                 .getname(), devicetag);                     }                     context.unregisterreceiver(this);                 } else if (state == bluetoothdevice.bond_none                         && prevstate == bluetoothdevice.bond_bonding) {                     log.d(log_tag, "cannot pair new device");                     if (listener != null) {                         listener.onbluetoothstatuschange(bluetoothhelper.idle_status);                     }                     context.unregisterreceiver(this);                 }             }         }      };      intentfilter intent = new intentfilter(             bluetoothdevice.action_bond_state_changed);     context.registerreceiver(mreceiver, intent); } 

first,if target version after api 19 , can use bluetoothdevice.createbond() pair device directly without use reflection. following methods work on devices before android 6.0!(after 6.0, system caller check avoid outer app call these methods）

 bluetoothadapter.getdefaultadapter().getprofileproxy(mainactivity.this, new bluetoothprofile.servicelistener() {      @override      public void onserviceconnected(int profile, bluetoothprofile proxy) {           class<?> clazz = null;           try {                clazz = class.forname("android.bluetooth.bluetoothinputdevice");                object obj = clazz.cast(proxy);                method connectmethod = clazz.getdeclaredmethod("connect",bluetoothdevice.class);                boolean resultcode = (boolean) connectmethod.invoke(obj,device);                method setpriority = clazz.getdeclaredmethod("setpriority",bluetoothdevice.class,int.class);                setpriority.invoke(obj,device,1000);           } catch (classnotfoundexception e) {                e.printstacktrace();           } catch (nosuchmethodexception e) {                e.printstacktrace();           } catch (invocationtargetexception e) {                e.printstacktrace();           } catch (illegalaccessexception e) {                e.printstacktrace();           }      }       @override      public void onservicedisconnected(int profile) {              log.d("wtf","onservice disconnected "+profile);      } },input_device);  final int input_device = 4; // hidden memeber in bluetoothdevice