Delphi 10: Problems with SizeOf(string) - Windows vs Android -

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i want send tmemostream android windows using indy idtcpclient , idtcpserver.

the problem this:

sizeof(string) in android 4 bytes sizeof(string) in windows 10 8 bytes

in android used code:

type tmyrecord = record   x1: string;   x2: string; end;  var   workrecord: tmyrecord;   rinfo: tmemorystream; begin   workrecord.x1:= 'hello';   workrecord.x2:= 'how you';   rinfo:= tmemorystream.create;    try     rinfo.write(workrecord, sizeof(workrecord));  //size of workrecord 8 bytes     androidtcpclient.iohandler.write(workrecord, 0, false);       rinfo.free;   end; end;

in windows 10 used code:

type tmyrecord = record   x1: string;   x2: string; end;  type tmyrecord = record   x1: string;   x2: string; end;  var   workrecord: tmyrecord;   rinfo: tmemorystream; begin   rinfo:= tmemorystream.create;    try     acontext.connection.iohandler.readstream(rinfo, sizeof(workrecord), false);     rinfo.position:= 0;     rinfo.read(workrecord, sizeof(workrecord)); //size of workrecord 16 bytes       rinfo.free;   end; end;

anyone advise me how set transmission string android windows?

sizeof(string) size of pointer. windows program compiled 64 bit , pointers 8 bytes wide. android program targets 32 bit , pointers 4 bytes wide.

the bigger problem cannot expect send pointers 1 process another. pointers refer memory in sending program. have no meaning in recipient. should serialize data, instance json, , send that. recipient can deserialize upon receipt.


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