RxVolley报错:Caused by: java.lang.RuntimeException: RequestQueue-> DiskBasedCache cache dir error

   Caused by: java.lang.RuntimeException: RequestQueue-> DiskBasedCache cache dir error

这是因为SD卡动态权限导致的 ,请先申请权限通过后在初始化Rxvolley

RxVolley.setRequestQueue(RequestQueue.newRequestQueue(RxVolley.CACHE_FOLDER,
        new OkHttpStack(new OkHttpClient())));