android Volley JSON请求

1.概述

关于Volley框架本人不做过多介绍！本文将提供一组JSON请求模板代码，希望对大家有所帮助！

进入主题前，啰嗦两句，大家应该注意以下两点：

1. 关于请求队列RequestQueue，建议整个应用共享一个请求队列。每次请求创建一个队列开销比较大，不算合理。

2. 建议实现parseNetworkResponse方法，设置编码格式，防止乱码。

2. GET请求

// 1.创建请求队列
		RequestQueue volleyRequestQueue = Volley.newRequestQueue(this);

		// 2.json get请求处理
		JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(
				Request.Method.GET, "your server url", null,
				new Response.Listener<JSONObject>() {

					@Override
					public void onResponse(JSONObject arg0) {
						try {
							String strState = arg0.getString("state");
							if (strState != null
									&& strState.equalsIgnoreCase("success")) {
								System.out.println("request success!");
							} else {
								System.out.println("request failed!");
							}
						} catch (Exception e) {
							System.out.println("request failed!");
						}
					}
				}, new Response.ErrorListener() {
					@Override
					public void onErrorResponse(VolleyError arg0) {
						System.out.println("request failed!");
					}
				}) {

			@Override
			protected Response<JSONObject> parseNetworkResponse(
					NetworkResponse arg0) {
				try {
					JSONObject jsonObject = new JSONObject(new String(
							arg0.data, "UTF-8"));
					return Response.success(jsonObject,
							HttpHeaderParser.parseCacheHeaders(arg0));
				} catch (UnsupportedEncodingException e) {
					return Response.error(new ParseError(e));
				} catch (Exception je) {
					return Response.error(new ParseError(je));
				}
			}

		};

		// 3.请求对象放入请求队列
		volleyRequestQueue.add(jsonObjectRequest);
           

3. POST请求

try {
			// 1.创建请求队列
			RequestQueue volleyRequestQueue = Volley.newRequestQueue(this);

			// 2.POST请求参数
			JSONObject params = new JSONObject();
			params.put("name", "zhangsan");
			params.put("password", "123456");

			// 3.json post请求处理
			JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(
					Request.Method.POST, "your server url", params,
					new Response.Listener<JSONObject>() {

						@Override
						public void onResponse(JSONObject arg0) {
							try {
								String strState = arg0.getString("state");
								if (strState != null
										&& strState.equalsIgnoreCase("success")) {
									System.out.println("request success!");
								} else {
									System.out.println("request failed!");
								}
							} catch (Exception e) {
								System.out.println("request failed!");
							}
						}
					}, new Response.ErrorListener() {
						@Override
						public void onErrorResponse(VolleyError arg0) {
							System.out.println("request failed!");
						}
					}) {

				@Override
				protected Response<JSONObject> parseNetworkResponse(
						NetworkResponse arg0) {
					try {
						JSONObject jsonObject = new JSONObject(new String(
								arg0.data, "UTF-8"));
						return Response.success(jsonObject,
								HttpHeaderParser.parseCacheHeaders(arg0));
					} catch (UnsupportedEncodingException e) {
						return Response.error(new ParseError(e));
					} catch (Exception je) {
						return Response.error(new ParseError(je));
					}
				}

			};

			// 4.请求对象放入请求队列
			volleyRequestQueue.add(jsonObjectRequest);
		} catch (Exception e) {
		}