LAMW: It is crash when I call jBluetooth1.GetRemoteDevice
lazarus / 43-Android

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Ritt · 2019-03-13 08:14

Hi Everyone,
I used the the example "AppBluetoothClientSocketDemo1"， the BLE device
was founded, so I Call:

      try
         jBluetoothClientSocket1.SetDevice(jBluetooth1.GetRemoteDevice
(deviceAddress));
         jBluetoothClientSocket1.Connect();
       except
         on E: Exception do ShowMessage(E.Message);
       end;

but it was crashed,
I try it in the android studio, it was work, how can I solve this
probleam?
Thanks

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Ritt · 2019-03-23 11:33

I founded that in the jBluetooth.pas:
function jBluetooth_GetRemoteDevice(env: PJNIEnv; _jbluetooth:
JObject; _macAddress: string): jObject;
var
  jParams: array[0..0] of jValue;
  jMethod: jMethodID=nil;
  jCls: jClass=nil;
begin
  jParams[0].l:= env^.NewStringUTF(env, PChar(_macAddress));
  jCls:= env^.GetObjectClass(env, _jbluetooth);
  jMethod:= env^.GetMethodID(env, jCls, 'GetRemoteDevice',
'(Ljava/lang/String;)Landroid/bluetooth/BluetoothDevice;');
  Result:= env^.CallObjectMethodA(env, _jbluetooth, jMethod,
@jParams);
  env^.DeleteLocalRef(env,jParams[0].l);
  env^.DeleteLocalRef(env, jCls);
end;   

The call the JNI function 'GetRemoteDevice',  but there is no function
with name 'GetRemoteDevice' in the jBluetooth.java.   I think this
should be change to 'GetRemoteDeviceByAddress'.

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jmpessoa · 2019-03-23 16:05

Fixed  "jBluetooth.java"!!!

Thank you!!!