通过Retrofit获取API时出错，但相同的API与postman一起工作

Question

这是我们面临的错误com.google.gson.JsonSynTaxException：java.lang.IllegalStateException：期望一个字符串，但BEGIN_OBJECT在第1行第1119列路径$. data[4]。last_received_message

public void DeviceList(String api, final ApiType apiTypes, String page_no, String authtoken) {
        ProgressDialog progressDialog = new ProgressDialog();
        try {
            this.pdLoading = progressDialog.getInstance(this.context);
            this.pdLoading.setProgressStyle(android.R.style.Widget_ProgressBar_Small);
            if (this.pdLoading.isShowing()) {
                this.pdLoading.cancel();
            }
            this.pdLoading.show();
        } catch (Exception e) {
            e.printStackTrace();
        }
        this.apiTypeVariable = apiTypes;
        /*RestAdapter adapter = new RestAdapter.Builder()
                .setEndpoint(api) //Setting the Root URL
                .build();*/
        Retrofit retrofit = new Retrofit.Builder().baseUrl(api).addConverterFactory(GsonConverterFactory.create()).client(okHttpClient).build();
        GitApi gi = retrofit.create(GitApi.class);
        call = (Call<T>) gi.getDevices(authtoken, page_no);
        call.enqueue(new Callback<T>() {

            @Override
            public void onResponse(Call<T> call, Response<T> response) {
                t = (T) response.body();
                if (pdLoading.isShowing())
                    pdLoading.cancel();
                onResponseListner.onResponse(t, apiTypeVariable, true);
            }

            @Override
            public void onFailure(Call<T> call, Throwable t) {
                Log.e(apiTypes.toString(), t.getMessage() + ".");
                if (pdLoading.isShowing())
                    pdLoading.cancel();
                onResponseListner.onResponse(null, apiTypeVariable, false);
            }

        });

}```

Answer 1

它表明在将json字符串转换为模型时出现了问题。具体来说，模型的一个属性声明为字符串类型，但json字符串中有一个字段（键）映射到对象类型。请检查您的模型是否兼容以及您从api收到的结果