使用retrofit 2下载POST方法的PDF响应

implementation 'com.squareup.retrofit2:retrofit:2.x.x'
implementation 'com.squareup.retrofit2:converter-gson:2.x.x' // 如果你希望使用Gson来解析响应

public interface ApiService {
    @POST("download/pdf")
    @Streaming
    Call<ResponseBody> downloadPdf(@Body RequestBody requestBody);
}

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .addConverterFactory(GsonConverterFactory.create()) // 如果你希望使用Gson来解析响应
    .build();

ApiService apiService = retrofit.create(ApiService.class);

Call<ResponseBody> call = apiService.downloadPdf(requestBody);
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
        if (response.isSuccessful()) {
            // 处理成功响应
            // 从response.body()中获取响应的PDF数据，并保存到本地文件
        } else {
            // 处理错误响应
        }
    }

    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
        // 处理请求失败
    }
});