处理排球中要求以后致电的错误

Question

我正在使用Volley库提供的RequestFuture进行同步 api调用。如果状态代码为4xx / 500，我需要处理错误响应。

    try {
  JSONObject response = future.get();
} catch (InterruptedException e) {
  // exception handling
} catch (ExecutionException e) {
  // exception handling
}

现在，该错误已由ExecutionException catch子句捕获。如何从此错误获取NetworkResponse。

如何在catch子句中覆盖onErrorListener。

Answer 1

尝试此操作以解决凌空抽烟的错误。在执行将来的请求时，也请注意，您应该使用get超时，这样就不会永远等待。

try
{
   JSONObject response = future.get(30,TimeUnit.SECONDS);
}
catch(InterruptedException | ExecutionException ex)
{
   //check to see if the throwable in an instance of the volley error
   if(ex.getCause() instanceof VolleyError)
   {
       //grab the volley error from the throwable and cast it back
       VolleyError volleyError = (VolleyError)ex.getCause();
      //now just grab the network response like normal
      NetworkResponse networkResponse = volleyError.networkResponse;
   }                          
}
catch(TimeoutException te)
{
   Log.e(TAG,"Timeout occurred when waiting for response");
}