关于Volley的使用方式

来源：互联网发布：油性染料淘宝编辑：程序博客网时间：2024/05/21 08:04

刚刚结束一个项目，做了俩次，第一个版本是根据之前一个类似的项目的代码修改成功的，它使用HttpClient进行Http请求。

<span style="font-family:Courier New;">public class MRequest{    private static final int NTHREADS = 10;    private Executor executor;//Ïß³Ì³Ø    private static MRequest instance;    public synchronized static MRequest getInstance()    {        if (instance == null)        {            instance = new MRequest();        }        return instance;    }    public void doPost(final String url, final List<NameValuePair> params,            final int reqType, final String appKey, final MCallback oc)    {        getExecutor().execute(new Runnable()        {            @Override            public void run()            {                HttpResponse response = null;                try                {                    HttpClient hc = new DefaultHttpClient();                    HttpPost hp = new HttpPost(url);                    if (null != appKey)                    {                        hp.addHeader("app_key", appKey);                    }                    if (null != params)                    {                        hp.setEntity(new UrlEncodedFormEntity(params));                    }                    response = hc.execute(hp);                    if (response.getStatusLine().getStatusCode() == 200)                    {                        String result = EntityUtils.toString(response                                .getEntity());                        //TODO:代码处理逻辑                    }                    else                    {                       //TODO:代码处理逻辑                    }                }                catch (Exception e)                {                      //TODO:代码处理逻辑                }            }        });    }public void doGet(final String url, final int reqType, final MCallback oc,            final String appKey, final boolean isLoadMore)    {        getExecutor().execute(new Runnable()        {            @Override            public void run()            {                HttpResponse response = null;                try                {                    HttpClient hc = new DefaultHttpClient();                    HttpGet hp = new HttpGet(url);                    if (null != appKey)                    {                        hp.addHeader("app_key", appKey);                    }                    response = hc.execute(hp);                    if (response.getStatusLine().getStatusCode() == 200)                    {                        String result = EntityUtils.toString(response                                .getEntity());                        //TODO:代码处理逻辑                    }                    else                    {                        //TODO:代码处理逻辑                    }                }                catch (Exception e)                {                       //TODO:代码处理逻辑                }            }        });    }    public void doPostJson(final String url, final String json,            final int reqType, final MCallback oc, final String appKey)    {        getExecutor().execute(new Runnable()        {            @Override            public void run()            {                try                {                    HttpURLConnection conn = (HttpURLConnection) new URL(url)                            .openConnection();                    conn.setDoOutput(true);                    conn.setRequestMethod("POST");                    conn.setRequestProperty("Content-Type", "application/json");                    if (null != appKey)                    {                        conn.setRequestProperty("app_key",                                ConfigApp.getAppKey());                    }                    OutputStream os = conn.getOutputStream();                    os.write(json.getBytes());                    os.flush();                    LogUtil.d("doPostJson() url=" + url + "\n" + "code="                            + conn.getResponseCode());                    if (!(conn.getResponseCode() == HttpURLConnection.HTTP_OK || conn                            .getResponseCode() == HttpURLConnection.HTTP_CREATED))                    {                    //TODO:代码处理逻辑                        return;                    }                    BufferedReader br = new BufferedReader(                            new InputStreamReader((conn.getInputStream())));                    String result = null;                    String output = null;                    while ((output = br.readLine()) != null)                    {                        result = output;                    }                    conn.disconnect();                    LogUtil.d("doPostJson()type=" + reqType + " url=" + url                            + "\n" + "result=" + result);</span><pre name="code" class="java"><span style="font-family:Courier New;">                    //TODO:代码处理逻辑</span>

} catch (Exception e) { //TODO:代码处理逻辑 } } }); }}

我重构代码的时候，觉得这个处理过程太麻烦了，所以就查了一下可以使用开源框架Volley来进行http请求，于是就使用了Volley的处理方式，代码的确得到了简化：

<span style="font-family:Courier New;">public class HTTPRequest {    private static RequestQueue mRequestQueue;    private static HTTPRequest instance;    public synchronized static HTTPRequest getInstance(Context context){        if (instance==null){            instance = new HTTPRequest();            mRequestQueue = Volley.newRequestQueue(context);        }        return instance;    }    public void doGet(final MCallback mc, String url, final int type){        StringRequest getRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {            @Override            public void onResponse(String response) {                HTTPResponseParse.parseResult(mc,response,type);            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {                MainLogic.getInstance().setNetOk(true);                mc.mCallback(MCallback.RSPTYPE_FAIL,M_HTTP.NETWORK_CANT_BE_USED,0,null);            }        }){            @Override            public Map<String, String> getHeaders() throws AuthFailureError {                Map<String,String> headers = new HashMap<>();                headers.put("app_key",MGLOBAL.APP_KEY);                return headers;            }        };        mRequestQueue.add(getRequest);    }    public void doPost(final MCallback mc, String url, final int type){        StringRequest postRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {            @Override            public void onResponse(String response) {                HTTPResponseParse.parseResult(mc,response,type);            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {                MainLogic.getInstance().setNetOk(true);                mc.mCallback(MCallback.RSPTYPE_FAIL,M_HTTP.NETWORK_CANT_BE_USED,0,null);            }        }){            @Override            public Map<String, String> getHeaders() throws AuthFailureError {                Map<String,String> headers = new HashMap<>();                headers.put("app_key",MGLOBAL.APP_KEY);                return headers;            }        };        mRequestQueue.add(postRequest);    }}</span>

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