修改volley默认超时时间以及重连次数

See com.android.volley.Request.setRetryPolicy() and the constructor for DefaultRetryPolicy, e.g.
代码如下：

myRequest.setRetryPolicy(new DefaultRetryPolicy(
                MY_SOCKET_TIMEOUT_MS, 
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES, 
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

注：DefaultRetryPolicy.DEFAULT_MAX_RETRIES为1
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT为1f

To handle Android Volley Timeout you need to use Retry Policy

Retry Policy

Volley provides an easy way to implement your RetryPolicy for your requests.
Volley sets default Socket & ConnectionTImeout to 5 secs for all requests.
RetryPolicy is an interface where you need to implement your logic of how you want to retry a particular request when a timeout happens.

It deals with these three parameters

Timeout - Specifies Socket Timeout in millis per every retry attempt.
Number Of Retries - Number of times retry is attempted.
Back Off Multiplier - A multiplier which is used to determine exponential time set to socket for every retry attempt.
For ex. If RetryPolicy is created with these values

Timeout - 3000 secs, Num of Attempt - 2, Back Off Multiplier - 2
Attempt 1:

time = time + (time * Back Off Multiplier );
time = 3000 + 6000 = 9000
Socket Timeout = time;
Request dispatched with Socket Timeout of 9 Secs
Attempt 2:

time = time + (time * Back Off Multiplier );
time = 9000 + 18000 = 27000
Socket Timeout = time;
Request dispatched with Socket Timeout of 27 Secs
So at the end of Attempt 2 if still Socket Timeout happenes Volley would throw a TimeoutError in your UI Error response handler.

//Set a retry policy in case of SocketTimeout & ConnectionTimeout Exceptions. 
//Volley does retry for you if you have specified the policy.
jsonObjRequest.setRetryPolicy(new DefaultRetryPolicy(5000, 
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES, 
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));