安卓通过httpget传入json参数，请求数据

server接口如：

http://127.0.0.1?param={
  "Params" : {
    "ProjectID" : "00000010"
  },
  "Version" : "1.0",
  "SessionID" : "111111",
  "Method" : "GetProject",
  "AppID" : "",
  "Key" : "

}

拼凑url的方法如：

public static String getProject(String projectID, String version, String sessionID, String method, String appID, String key) throws JSONException{
JSONObject jo1 = new JSONObject();
jo1.put("ProjectID", projectID);


JSONObject jo = new JSONObject();
        jo.put("Params",jo1);
        jo.put("Version", version);
        jo.put("SessionID", sessionID);
        jo.put("Method", method);
        jo.put("AppID", appID);
        jo.put("Key", key);


        String str = jo.toString().replace("\"", "%22").replace("{", "%7b").replace("}", "%7d");
return "http://127.0.0.1?param="+str;
}

tips：在http post或get请求时，传入的参数不能有"或{或}，所以需要转码。

从server发送请求得到数据:

public JSONObject getJSONObjFromUrl(String url) throws Exception {
HttpParams httpParams = new BasicHttpParams();
setHttpParams(httpParams);

DefaultHttpClient httpClient = new DefaultHttpClient(httpParams);
HttpGet httpGet = new HttpGet(url);

HttpResponse httpResponse = httpClient.execute(httpGet);

int res = httpResponse.getStatusLine().getStatusCode();

if (200 == res) {
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();

BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
jsonStr = sb.toString();
jObj = new JSONObject(jsonStr);
} else {
throw new Exception();
}
return jObj;
}