Volley framework: strategy division of error treatment and abnormal treatment

Volley framework: strategy analysis of error treatment and abnormal treatment When developing mobile applications, network requests are essential part.However, various errors and abnormalities will inevitably occur on network requests, such as network connection failures, timeouts, and server errors.In order to provide good user experience and stable applications, we need to effectively deal with these errors and abnormalities, and provide appropriate feedback and processing strategies. The Volley framework is a Android library for processing network requests. It provides some default error treatment and abnormal processing strategies to help developers quickly and effectively handle errors and abnormalities in network requests.The following will introduce the error treatment and abnormal processing strategies commonly used in the Volley framework, and provide some Java code examples. 1. Error processing strategy: -The trial strategy: Volley's default retry strategy will automatically make a request for retry when the request fails.Developers can adjust the number and interval time by setting up "RetryPolicy". RequestQueue requestQueue = Volley.newRequestQueue(context); request.setRetryPolicy(new DefaultRetryPolicy( DefaultRTRYPOLICY.DEFAULT_TIMEOUT_MS, // timeout time (millisecond) DefaultRTRYPOLICY.DEFAULT_MAX_RETRIES, // DefaultRTRYPOLICY.DEFAULT_BACKOFF_MULT); // Review strategy requestQueue.add(request); -Error callback: Volley can monitor the error situation in the request process by registering "ErrorListener" and perform the corresponding callback operation. RequestQueue requestQueue = Volley.newRequestQueue(context); request.setErrorListener(new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { // Treatment error callback } }); requestQueue.add(request); 2. Abnormal processing strategy: -Timeout strategy: Volley provides an interface for setting request timeout, and developers can set up appropriate timeouts according to their needs. RequestQueue requestQueue = Volley.newRequestQueue(context); request.setRetryPolicy(new DefaultRetryPolicy( Timeout_value, // Set timeout time (millisecond) DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); requestQueue.add(request); -Step network connection status monitoring: Volley can monitor the changes in the network connection status by registering the "NetworkStateChangedListener" and make corresponding treatment according to the actual situation. RequestQueue requestQueue = Volley.newRequestQueue(context); requestQueue.addRequestFinishedListener(new RequestQueue.RequestFinishedListener<Object>() { @Override public void onRequestFinished(Request<Object> request) { int statusCode = request.getNetworkResponse().statusCode; if (statusCode == HttpStatus.SC_UNAUTHORIZED) { // Processing unauthorized error } else if (statusCode == HttpStatus.SC_BAD_REQUEST) { // Processing an error request } } }); In addition to the above -mentioned commonly used error treatment and abnormal processing strategies, the Volley framework also provides other advanced processing strategies, such as custom error response and cache strategies.Developers can choose appropriate processing strategies based on specific application scenarios and needs. In summary, the Volley framework provides us with some default error treatment and abnormal processing strategies, and also supports custom processing strategies to help us effectively handle errors and abnormal conditions in network requests, thereby providing better provisionUser experience and application stability.In actual development, we should choose appropriate processing strategies according to specific needs, and continuously optimize and improve our applications in combination with error logs and user feedback.