[Android]JsonObject解析

android和服务器进行交互的时候往往会有数据的传输，而数据中有一种类型就是Json型，这两天在研究API接口的问题，服务器返回的数据类型都是Json型的。例如：

1.接收到的json字符串分为两种一种为array型，一种为Object型。下面就是Object型（嵌套型）：

{"errNum":0,"errMsg":"success","retData":{"city":"u5317u4eac","pinyin":"beijing","citycode":"101010100","date":"15-07-21","time":"11:00","postCode":"100000","longitude":116.391,"latitude":39.904,"altitude":"33","weather":"u96f7u9635u96e8","temp":"28","l_tmp":"22","h_tmp":"28","WD":"u65e0u6301u7eedu98ceu5411","WS":"u5faeu98ce(<10m/h)","sunrise":"05:02","sunset":"19:38"}}

2.提取其中的value值：

（代码已测试）

String response = (String) msg.obj;
                // Json字符串解析

                String errMsg = null;
                int errNum = 2;
                try {
                    JSONObject jsonObject = new JSONObject(response.toString());
                    errMsg = jsonObject.getString("errMsg");
                    errNum = jsonObject.getInt("errNum");
                } catch (JSONException e1) {
                    // TODO 自动生成的 catch 块
                    e1.printStackTrace();
                }

                    JSONObject jsonObject1 = null;
                    try {
                        jsonObject1 = new JSONObject(response.toString())
                                .getJSONObject("retData");
                    } catch (JSONException e) {
                        // TODO 自动生成的 catch 块
                        e.printStackTrace();
                    }
                    String city = null;
                    String date = null;
                    String time = null;
                    String weather = null;
                    String temp = null;
                    String l_tmp = null;
                    String h_tmp = null;
                    String WD = null;
                    String WS = null;
                    String sunrise = null;
                    String sunset = null;
                    try {
                        city = jsonObject1.getString("city");
                        date = jsonObject1.getString("date");
                        time = jsonObject1.getString("time");
                        weather = jsonObject1.getString("weather");
                        temp = jsonObject1.getString("temp");
                        l_tmp = jsonObject1.getString("l_tmp");
                        h_tmp = jsonObject1.getString("h_tmp");
                        WD = jsonObject1.getString("WD");
                        WS = jsonObject1.getString("WS");
                        sunrise = jsonObject1.getString("sunrise");
                        sunset = jsonObject1.getString("sunset");
                    } catch (JSONException e) {
                        // TODO 自动生成的 catch 块
                        e.printStackTrace();
                    }