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Сделал простой пример приложения рации в локальной сети под Android. Реализация через UDP. Буду рад, если кому окажется полезным. Для начала/окончания сеанса связи нужно нажать на окружность Для проверки нужно 2 телефона unit Unit5; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.Controls.Presentation, FMX.StdCtrls, IdUDPServer, IdBaseComponent, IdComponent, IdUDPBase, IdUDPClient, IdGlobal, IdSocketHandle, Androidapi.JNI.Media, Androidapi.JNI.JavaTypes, Androidapi.JNIBridge, AndroidApi.JNI, AndroidApi.Helpers, FMX.Objects, System.Math; type TForm1 = class(TForm) Circle: TCircle; procedure ServerUDPRead(AThread: TIdUDPListenerThread; const AData: TIdBytes; ABinding: TIdSocketHandle); procedure FormCreate(Sender: TObject); procedure CircleTap(Sender: TObject; const Point: TPointF); end; TSendThread = class(TThread) protected procedure Execute; override; end; var Form1: TForm1; SendThread: TSendThread; Server: TIdUDPServer; audioRecord: JaudioRecord; audiotrack: JAudioTrack; recording: boolean; buffer_Size, port,ch_in, ch_out, format, freq, source: integer; implementation {$R *.fmx} procedure TSendThread.Execute; var buffer: TJavaArray<Byte>; begin buffer := TJavaArray<Byte>.create(buffer_size); while recording do begin audioRecord.read(buffer,0,buffer_size); Server.Broadcast(TIDBytes(TJavaArrayToTBytes(buffer)),port); end; buffer.Free; end; procedure TForm1.CircleTap(Sender: TObject; const Point: TPointF); begin recording:= not recording; if recording then begin Circle.Fill.Color:=TAlphaColors.Red; Server.OnUDPRead:=nil; audiorecord.startRecording; SendThread:=TSendThread.Create; end else begin Circle.Fill.Color:=TAlphaColors.Gray; audiorecord.stop; Server.OnUDPRead:=ServerUDPRead; end; end; procedure TForm1.FormCreate(Sender: TObject); begin buffer_size:=2048; freq:=8000; port:=5555; Server:=TIdUdpServer.Create(Form1); with Server do begin BufferSize:=buffer_size; DefaultPort:=port; BroadCastEnabled:=true; Active:=true; OnUDPRead:=ServerUDPRead; end; Circle.Width:=min(Screen.Width,Screen.Height)*0.7; Circle.Height:=Circle.Width; ch_in:=TJAudioFormat.JavaClass.CHANNEL_IN_MONO; ch_out:=TJAudioFormat.JavaClass.CHANNEL_OUT_MONO; format:=TJAudioFormat.JavaClass.ENCODING_PCM_16BIT; source:=TJMediaRecorder_AudioSource.JavaClass.MIC; audioRecord := TJAudioRecord.JavaClass.init(source, freq, ch_in, format, buffer_size); audiotrack:=TJAudioTrack.JavaClass.init(3, freq, ch_out, format, buffer_size,1); end; procedure TForm1.ServerUDPRead(AThread: TIdUDPListenerThread; const AData: TIdBytes; ABinding: TIdSocketHandle); begin audiotrack.write(TBytesToTJavaArray(TBytes(AData)),0,Length(AData)); audiotrack.play; end; end. radio.zip