1.这可能是okhttp3里面的问题
错误的写法

private void getSingProject(String project_inner_id) {
        GetSingleProjectRequest getSingleProjectRequest = new GetSingleProjectRequest();
        getSingleProjectRequest.setCc(new GetSingleProjectRequest.CcBean(SPUtils.getMyGuid(MyApplication.context)));
        getSingleProjectRequest.setPc(new GetSingleProjectRequest.PcBean((project_inner_id)));
        Log.e(TAG, "获取单个项目详情" + gson.toJson(getSingleProjectRequest) + SPUtils.getToken(this));
        MyApplication.mibeeAPI.getSingleProject2(getSingleProjectRequest, SPUtils.getToken(MyApplication.context)).enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                try {
                    if (response != null) {
                        if(response.body!=null){  
                            if(response.body().bytes()!=null){
                                  String result = new String(response.body().bytes(), "UTF-8");
                                  FileUtils.saveFile(FileUtils.Project, result);
                              }
                          }

                    } else {
                        Log.e(TAG, "获取单个项目详情出异常response == null");
                    }
                } catch (IOException e) {
                    Log.e(TAG, "获取单个项目详情出异常:" + e.getMessage());
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e(TAG, "获取单个项目详情出错");
            }
        });
    }

正确的写法

private void getSingProject(String project_inner_id) {
        GetSingleProjectRequest getSingleProjectRequest = new GetSingleProjectRequest();
        getSingleProjectRequest.setCc(new GetSingleProjectRequest.CcBean(SPUtils.getMyGuid(MyApplication.context)));
        getSingleProjectRequest.setPc(new GetSingleProjectRequest.PcBean((project_inner_id)));
        Log.e(TAG, "获取单个项目详情" + gson.toJson(getSingleProjectRequest) + SPUtils.getToken(this));
        MyApplication.mibeeAPI.getSingleProject2(getSingleProjectRequest, SPUtils.getToken(MyApplication.context)).enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                try {
                    if (response != null) {
                        ResponseBody responseBody = response.body();
                        if (responseBody != null) {
                            byte[] resultArray = responseBody.bytes();
                            if (resultArray != null) {
                                String result = new String(resultArray, "UTF-8");
                                FileUtils.saveFile(FileUtils.Project, result);
                            } else {
                                Log.e(TAG, "获取单个项目详情出异常resultArray == null");
                            }
                        } else {
                            Log.e(TAG, "获取单个项目详情出异常responseBody == null");
                        }

                    } else {
                        Log.e(TAG, "获取单个项目详情出异常response == null");
                    }
                } catch (IOException e) {
                    Log.e(TAG, "获取单个项目详情出异常:" + e.getMessage());
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e(TAG, "获取单个项目详情出错");
            }
        });
    }