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在app开发中,我们最常见的就是从app客户端向服务端发一个http请求.对于两种基本的web请求方式get和post来说,get请求方式相对比较简单,在此略过不表.本文重点描述一下通过volley进行几种post提交的方式.
1.客户端以普通的post方式进行提交,服务端返回字符串
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
StringRequest stringRequest = new StringRequest(Request.Method.POST,httpurl, new Response.Listener<String>() { @Override public void onResponse(String response) { Log.d(TAG, "response -> " + response); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e(TAG, error.getMessage(), error); } }) { @Override protected Map<String, String> getParams() { //在这里设置需要post的参数 Map<String, String> map = new HashMap<String, String>(); map.put("name1", "value1"); map.put("name2", "value2"); return params; }}; requestQueue.add(stringRequest);RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
Map<String, String> map = new HashMap<String, String>(); map.put("name1", "value1"); map.put("name2", "value2"); JSONObject jsonObject = new JSONObject(params);JsonRequest<JSONObject> jsonRequest = new JsonObjectRequest(Method.POST,httpurl, jsonObject, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { Log.d(TAG, "response -> " + response.toString()); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e(TAG, error.getMessage(), error); } }) { //注意此处override的getParams()方法,在此处设置post需要提交的参数根本不起作用 //必须象上面那样,构成JSONObject当做实参传入JsonObjectRequest对象里 //所以这个方法在此处是不需要的// @Override// protected Map<String, String> getParams() { // Map<String, String> map = new HashMap<String, String>(); // map.put("name1", "value1"); // map.put("name2", "value2"); // return params;// } @Override public Map<String, String> getHeaders() { HashMap<String, String> headers = new HashMap<String, String>(); headers.put("Accept", "application/json"); headers.put("Content-Type", "application/json; charset=UTF-8"); return headers; }};requestQueue.add(jsonRequest);private class NormalPostRequest extends Request<JSONObject> {
private Map<String, String> mMap; private Listener<JSONObject> mListener; public NormalPostRequest(String url, Listener<JSONObject> listener,ErrorListener errorListener, Map<String, String> map) { super(Request.Method.POST, url, errorListener); mListener = listener; mMap = map; } //mMap是已经按照前面的方式,设置了参数的实例 @Override protected Map<String, String> getParams() throws AuthFailureError { return mMap; } //此处因为response返回值需要json数据,和JsonObjectRequest类一样即可 @Override protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) { try { String jsonString = new String(response.data,HttpHeaderParser.parseCharset(response.headers)); return Response.success(new JSONObject(jsonString),HttpHeaderParser.parseCacheHeaders(response)); } catch (UnsupportedEncodingException e) { return Response.error(new ParseError(e)); } catch (JSONException je) { return Response.error(new ParseError(je)); } } @Override protected void deliverResponse(JSONObject response) { mListener.onResponse(response); }}RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
Request<JSONObject> request = new NormalPostRequest(httpurl, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { Log.d(TAG, "response -> " + response.toString()); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e(TAG, error.getMessage(), error); } }, params);requestQueue.add(request);标签：
原文地址：http://www.cnblogs.com/cy21528/p/4837720.html
