Volley实战用法

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单例类。

public class VolleySingleton {    private static VolleySingleton mInstance;    private RequestQueue mRequestQueue;    private VolleySingleton() {        mRequestQueue = getRequestQueue();    }    public static synchronized VolleySingleton getInstance() {        if (mInstance == null) {            mInstance = new VolleySingleton();        }        return mInstance;    }    public RequestQueue getRequestQueue() {        if (mRequestQueue == null) {            mRequestQueue = Volley.newRequestQueue(UpApplication.getInstance().getApplicationContext());        }        return mRequestQueue;    }    public <T> void addToRequestQueue(Request<T> req) {        getRequestQueue().add(req);    }

添加请求。

public class UpRequests {    public static void getItemDetails(String path, String sort,int pageNum, final ItemCallback callback) {        //TODO: find a way to integrate pageNum parameter into the query parameters of the request        // whenever pagination is supported        Uri.Builder uriBuilder = new Uri.Builder()                .scheme("http").authority("materialup.com")                .appendPath("posts")                .appendPath("c")                .appendPath(path)                .appendQueryParameter("page",String.valueOf(pageNum));        if (!StringUtils.isEmpty(sort)) {            uriBuilder.appendQueryParameter("sort", sort);            Log.e("url---->",uriBuilder.toString());        }        StringRequest stringRequest = new StringRequest(com.android.volley.Request.Method.GET, uriBuilder.toString(),                new Response.Listener<String>() {                    @Override                    public void onResponse(String response) {                        ItemResponse itemsResponse = ParseUtils.parseItems(response);                        callback.onItemSuccess(itemsResponse);                    }                }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {                callback.onItemError(new ItemException(UpApplication.getInstance().getString(R.string.error_connection)));            }        });        VolleySingleton.getInstance().addToRequestQueue(stringRequest);    }

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