[移动开发]ratrofit +okhttp + gson 解析数据为空 （接口已返回json数据）

这真是个无语的问题，我先是以为接口数据格式变了，但是我检查了json，发现没有问题，有把所有的字段对了一遍，命名也没有问题，然后就开始打断点，把request和response都打印了一遍，发现response里的解析的body确实是空的，然后就去找解析的位置，因为使用了ratrofit + okhttp + gson的框架结构，于是在okhttpCall的enqueue方法中,

public void enqueue(final Callback<T> callback) {
        Utils.checkNotNull(callback, "callback == null");
        okhttp3.Call call;
        Throwable failure;
        synchronized(this) {
            if (this.executed) {
                throw new IllegalStateException("Already executed.");
            }

            this.executed = true;
            call = this.rawCall;
            failure = this.creationFailure;
            if (call == null && failure == null) {
                try {
                    call = this.rawCall = this.createRawCall();
                } catch (Throwable var7) {
                    failure = this.creationFailure = var7;
                }
            }
        }

        if (failure != null) {
            callback.onFailure(this, failure);
        } else {
            if (this.canceled) {
                call.cancel();
            }

            call.enqueue(new okhttp3.Callback() {
                public void onResponse(okhttp3.Call call, Response rawResponse) throws IOException {
                    retrofit2.Response response;
                    try {
                        response = OkHttpCall.this.parseResponse(rawResponse);
                    } catch (Throwable var5) {
                        this.callFailure(var5);
                        return;
                    }

                    this.callSuccess(response);
                }

                public void onFailure(okhttp3.Call call, IOException e) {
                    try {
                        callback.onFailure(OkHttpCall.this, e);
                    } catch (Throwable var4) {
                        var4.printStackTrace();
                    }

                }

                private void callFailure(Throwable e) {
                    try {
                        callback.onFailure(OkHttpCall.this, e);
                    } catch (Throwable var3) {
                        var3.printStackTrace();
                    }

                }

                private void callSuccess(retrofit2.Response<T> response) {
                    try {
                        callback.onResponse(OkHttpCall.this, response);
                    } catch (Throwable var3) {
                        var3.printStackTrace();
                    }

                }
            });
        }
    }

注意到这个方法：OkHttpCall.this.parseResponse

retrofit2.Response<T> parseResponse(Response rawResponse) throws IOException {
        ResponseBody rawBody = rawResponse.body();
        rawResponse = rawResponse.newBuilder().body(new OkHttpCall.NoContentResponseBody(rawBody.contentType(), rawBody.contentLength())).build();
        int code = rawResponse.code();
        if (code >= 200 && code < 300) {
            if (code != 204 && code != 205) {
                OkHttpCall.ExceptionCatchingRequestBody catchingBody = new OkHttpCall.ExceptionCatchingRequestBody(rawBody);

                try {
                    T body = this.serviceMethod.toResponse(catchingBody);
                    return retrofit2.Response.success(body, rawResponse);
                } catch (RuntimeException var9) {
                    catchingBody.throwIfCaught();
                    throw var9;
                }
            } else {
                rawBody.close();
                return retrofit2.Response.success((Object)null, rawResponse);
            }
        } else {
            retrofit2.Response var5;
            try {
                ResponseBody bufferedBody = Utils.buffer(rawBody);
                var5 = retrofit2.Response.error(bufferedBody, rawResponse);
            } finally {
                rawBody.close();
            }

            return var5;
        }
    }

T body = this.serviceMethod.toResponse(catchingBody);这个方法返回了解析出来的数据，继续跟：

    R toResponse(ResponseBody body) throws IOException {
        return this.responseConverter.convert(body);
    }

它的实现是通过gson来做的，这个就不细看了，主要看一下返回值，直接是空的，然后，然后提示一个错误，某个字段解析出错，但是这里边直接catch 了，我又检查了该字段，发现是字段类型定义有问题，本来是个long类型的，可是接口返回的是个string类型的，解析异常。