delphi7服务器端与delphi10.4.2安卓端TSocket通信的实例代码

以下是一个简单的 Delphi7 服务器端和 Delphi10.4.2 安卓端 TSocket 通信的实例代码：

Delphi7 服务器端：

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ScktComp, StdCtrls;

type
  TForm1 = class(TForm)
    btnStart: TButton;
    Memo1: TMemo;
    procedure btnStartClick(Sender: TObject);
  private
    { Private declarations }
    FServerSocket: TServerSocket;
    procedure OnClientConnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure OnClientRead(Sender: TObject; Socket: TCustomWinSocket);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.btnStartClick(Sender: TObject);
begin
  Memo1.Lines.Add('Starting server...');
  FServerSocket := TServerSocket.Create(nil);
  FServerSocket.OnClientConnect := OnClientConnect;
  FServerSocket.Port := 1234;
  FServerSocket.Active := True;
  Memo1.Lines.Add('Server started.');
end;

procedure TForm1.OnClientConnect(Sender: TObject; Socket: TCustomWinSocket);
begin
  Memo1.Lines.Add('Client connected.');
  Socket.OnRead := OnClientRead;
end;

procedure TForm1.OnClientRead(Sender: TObject; Socket: TCustomWinSocket);
var
  Str: string;
begin
  Str := Socket.ReceiveText;
  Memo1.Lines.Add('Received: ' + Str);
  Socket.SendText('Hello from server');
end;

end.

Delphi10.4.2 客户端：

unit Unit1;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, FMX.Types, FMX.Controls, FMX.Forms, FMX.Dialogs,
  System.Win.ScktComp, FMX.Layouts, FMX.Memo, FMX.StdCtrls;

type
  TForm1 = class(TForm)
    btnConnect: TButton;
    btnSend: TButton;
    edtIP: TEdit;
    edtPort: TEdit;
    edtMessage: TEdit;
    Memo1: TMemo;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    procedure btnConnectClick(Sender: TObject);
    procedure btnSendClick(Sender: TObject);
  private
    { Private declarations }
    FSocket: TClientSocket;
    procedure OnSocketRead(Sender: TObject; Socket: TCustomWinSocket);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}

procedure TForm1.btnConnectClick(Sender: TObject);
begin
  Memo1.Lines.Add('Connecting...');
  FSocket := TClientSocket.Create(nil);
  FSocket.OnRead := OnSocketRead;
  FSocket.Host := edtIP.Text;
  FSocket.Port := StrToInt(edtPort.Text);
  FSocket.Open;
end;

procedure TForm1.btnSendClick(Sender: TObject);
begin
  if Assigned(FSocket) then
  begin
    FSocket.Socket.SendText(edtMessage.Text);
    Memo1.Lines.Add('Sending: ' + edtMessage.Text);
  end;
end;

procedure TForm1.OnSocketRead(Sender: TObject; Socket: TCustomWinSocket);
var
  Str: string;
begin
  Str := Socket.ReceiveText;
  Memo1.Lines.Add('Received: ' + Str);
end;

end.

该代码实现了一个简单的服务器-客户端通信，当客户端连接到服务器时，服务器会触发 OnClientConnect 事件，当客户端向服务器发送数据时，服务器会触发 OnClientRead 事件并将收到的数据发送回客户端。客户端通过编辑 IP 地址、端口和消息文本框来连接到服务器，发送数据并接收响应。当客户端收到数据时，OnSocketRead 事件将被触发，并将收到的数据添加到 Memo1 控件中。