feat: 获取sn

WebRTCController/app/src/main/java/com/ttstd/controller/MainActivity.java

@@ -21,6 +21,7 @@ import com.ttstd.control.ControlMessage;
 import com.ttstd.controller.signaling.SignalMessage;
 import com.ttstd.controller.signaling.WebSocketClient;
 import com.ttstd.controller.view.RemoteTouchView;
+import com.ttstd.controller.utils.DeviceUtils;
 import com.ttstd.controller.webrtc.WebRtcClient;
 
 import org.webrtc.EglBase;
@@ -29,7 +30,6 @@ import org.webrtc.RendererCommon;
 import org.webrtc.SurfaceViewRenderer;
 
 import java.util.Locale;
-import java.util.UUID;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -92,8 +92,8 @@ public class MainActivity extends AppCompatActivity {
 
         // 默认服务器地址
         etServerUrl.setText("ws://175.178.213.60:8088/ws/signal");
-        // 生成设备ID
-        myDeviceId = "controller_" + UUID.randomUUID().toString().substring(0, 8);
+        // 生成设备ID（非系统签名，使用兜底方案获取设备标识）
+        myDeviceId = DeviceUtils.getSerialNumber(this);
         etDeviceId.setText(myDeviceId);
 
         btnConnect.setOnClickListener(v -> connectToControlled());