发起 AI 实时语音对话（三段式）

签发 UserSig → 客户端集成 SDK 进房 → 服务端创建 AI 对话任务 → 监听事件回调 → 结束任务

// 1. 创建 TRTC 实例
TRTCCloud trtc = TRTCCloud.sharedInstance(context.getApplicationContext());

// 2. 开启音量回调与 VAD 通知，用于 UI 展示用户是否正在说话
TRTCAudioVolumeEvaluateParams volumeParams = new TRTCAudioVolumeEvaluateParams();
volumeParams.enableVadDetection = true;
trtc.enableAudioVolumeEvaluation(true, volumeParams);

// 3. 开启音频采集（通话音质）
trtc.setSystemVolumeType(TRTCSystemVolumeTypeMedia);
trtc.startLocalAudio(TRTC_AUDIO_QUALITY_SPEECH);

// 4. 如需静音采集，可设置采集音量为 0
trtc.setAudioCaptureVolume(0);

// 5. 进房
TRTCParams params = new TRTCParams();
params.sdkAppId = <sdkAppId>;
params.userId   = <localUserId>;
params.userSig  = <userSig>;
params.roomId   = <roomId>;
params.role     = TRTCRoleAnchor;
trtc.enterRoom(params, TRTC_APP_SCENE_VIDEOCALL);

{
    "SdkAppId": 14000000,
    "RoomId": "12345",
    "RoomIdType": 0,
    "ConversationMode": "Cascade",
    "AgentConfig": {
        "UserId": "test2",
        "UserSig": "eJyrVgrxCdYrzkxXslJQyvEs...",
        "TargetUserId": ["Trtc_User_0"],
        "MaxIdleTime": 60,
        "SubtitleMode": 0,
        "TurnDetectionMode": "Auto",
        "TTSPushRoomParams": { "UserId": "tts-bot-001" }
    },
    "STTConfig": {
        "Provider": "trtc",
        "Params": "{\\"engine_model_type\\":\\"bigmodel\\",\\"language\\":\\"zh\\",\\"vad_silence_time\\":\\"1000\\"}"
    },
    "LLMConfig": {
        "LLMType": "openai",
        "Model": "gpt-4o-mini",
        "APIKey": "<YOUR_API_KEY>",
        "APIUrl": "https://api.openai.com/v1/chat/completions",
        "SystemPrompt": "你是一个简洁的对话助手。",
        "Timeout": 20000,
        "Temperature": 0.7
    },
    "TTSConfig": {
        "Provider": "trtc",
        "Params": "{\\"Model\\":\\"flow_02_turbo\\",\\"VoiceId\\":\\"v-female-R2s4N9qJ\\",\\"Speed\\":1.0}"
    },
    "DialogConfig": {
        "InterruptMode": 0,
        "InterruptSpeechDuration": 200,
        "WelcomeMessage": "你好，我是AI助手，有什么可以帮你的？"
    }
}