移除自动新建数据流通道的支持，以便使用者按需自主创建

android/src/main/java/com/syan/agora/AgoraModule.java

 import static com.facebook.react.bridge.UiThreadUtil.runOnUiThread;
 
 public class AgoraModule extends ReactContextBaseJavaModule {
-    private int defaultStreamId = -1;
 
     public AgoraModule(ReactApplicationContext context) {
 
     @ReactMethod
     public void init(ReadableMap options) {
         AgoraManager.getInstance().init(getReactApplicationContext(), mRtcEventHandler, options);
-        this.defaultStreamId = AgoraManager.getInstance().mRtcEngine.createDataStream(false, false);
     }
 
     //进入房间
     // 发送数据
     @ReactMethod
     public void sendStreamMessage(int streamId, String message, Callback onError) {
-        onError.invoke(AgoraManager.getInstance().mRtcEngine.sendStreamMessage(streamId > 0 ? streamId : this.defaultStreamId, message.getBytes()));
+        onError.invoke(AgoraManager.getInstance().mRtcEngine.sendStreamMessage(streamId, message.getBytes()));
     }
 
     //销毁引擎实例

ios/RCTAgora/RCTAgora.m

     return @{};
 }
 
-NSInteger defaultDataStreamId = -1;
-
 /**
  *  初始化AgoraKit
  *
     [self.rtcEngine setVideoProfile:[options[@"videoProfile"] integerValue]swapWidthAndHeight:[options[@"swapWidthAndHeight"]boolValue]];
     [self.rtcEngine setClientRole:[options[@"clientRole"] integerValue] withKey:nil];
 
-    // 创建默认数据通道
-    [self.rtcEngine createDataStream:&dataChannelId reliable:0 ordered:0];
-
     //Agora Native SDK 与 Agora Web SDK 间的互通
     [self.rtcEngine enableWebSdkInteroperability:YES];
 
 发送数据流
 */
 RCT_EXPORT_METHOD(sendStreamMessage:(NSInteger)streamId data:(NSData*)data callback:(RCTResponseSenderBlock)callback){
-  int err = [self.rtcEngine sendStreamMessage:(streamId > 0 ? streamId : defaultDataStreamId) data:data];
+  int err = [self.rtcEngine sendStreamMessage:(streamId) data:data];
   callback(@[[NSNumber numberWithInteger:err]]);
 }