1.发送request.
a. post:
生成请求
HttpPost request = new HttpPost(url);
HttpClient httpClient = new DefaultHttpClient();
设置30s连接不上则失败
httpClient.getConnectionManager().closeIdleConnections(30,TimeUnit.SECONDS);
发送请求,获得返回结果
response = httpClient.execute(request);
HttpEntity httpEntity = response.getEntity();
基本代码如下:
public Entity httpPost(String url) {
if (url == null || url.equals("")) {
return null;
}
HttpPost request = new HttpPost(url);
httpClient.getConnectionManager().closeIdleConnections(30,TimeUnit.SECONDS);
HttpResponse response;
Entity value = null;
try {
response = httpClient.execute(request);
HttpEntity httpEntity = response.getEntity();
if (httpEntity != null) {
value = new Entity(asString(httpEntity).toString());
httpEntity.consumeContent();
}
}
catch (ClientProtocolException e1) {
e1.printStackTrace();
}
catch (IOException e1) {
e1.printStackTrace();
}
return value;
}
用到包如下:
commons-codec-1.4.jar
commons-logging-1.1.1.jar
httpclient-4.0.1.jar
httpcore-4.0.1.jar
MapApi.jar
不可直接下载可以在
http://hc.apache.org/downloads.cgi下载
我们的网络连接用http.rar中方法
调用时new LBSHttpClient().httpPost(url.toString()).asJSONObject();就OK了
instancel 中有具体调用
2. 对JSON的解析:
因为用某些方法存在中文得到的是\uxxxx的unicode码,我们用了一个开源的类用来解析json.
相关类,会以压缩包的形式提交。
对json的具体解析方法是:
a. JSONObject.
jsonObject.getString();
jsonObject.getXXX();
b. JSONArray.
jsonArray = jsonObject.getJSONArray("circle_list");
Log.d (TAG, "jsonArray.length():" + jsonArray.length());
for (int i = 0; i < jsonArray.length() ; i ++){
Log.d (TAG, "3");
JSONObject circleObject = jsonArray.getJSONObject(i);
CircleInfo circleInfo = new CircleInfo();
circleInfo.setTag(circleObject.getString("tag"));
circleInfo.setName(circleObject.getString("name"));
circleInfo.setMemNum(circleObject.getLong("memner_num"));
circleInfo.setCityName(circleObject.getString("city_name"));
circleInfo.setId(circleObject.getLong("id"));
circleInfo.setImageId(circleObject.getLong("image_id"));
list.add(circleInfo);
}