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今天项目中要实现一个天气的预览,加载的信息很多,字段也很多,所以理清了一下思路,准备独立出来写一个总结,这样对大家还是很有帮助的,老司机要开车了
涉及到网络,你就一定要先添加权限,准没错
这个也是最简单的一类Json了,我的博客
里面不管是手机归属地查询还是QQ吉凶,解析得到的Json都是最简单的类型,我们这里以手机归属地为例来讲述
这里的接口
http://apis.juhe.cn/mobile/get?phone=18679606764&key=22a6ba14995ce26dd0002216be51dabb
这里说明一下,我们现在以及接下来的例子,都会用到Volley来解析接口得到Json,所以不会用Volley的话可以先去看一下上面的两篇文章
Volley你到哪都能下载到,就不详细说了
既然我们接口有了,我们就开始解析吧
/** * 解析接口 */ private void Volley_Get() { String url = "http://apis.juhe.cn/mobile/get?phone=" + myPhone + "&key=22a6ba14995ce26dd0002216be51dabb"; RequestQueue queue = Volley.newRequestQueue(this); StringRequest request = new StringRequest(Method.PUBLIC, url, new Response.Listener() { // 成功 @Override public void onResponse(String json) { Log.i("Json", json); } }, new Response.ErrorListener() { // 失败 @Override public void onErrorResponse(VolleyError errorLog) { Log.e("Error", errorLog.toString()); } }); queue.add(request); }
这样,我们就解析得到了一串JSON,也就是今天本文中的主角
{ "error_code": 0, "reason": "Return Successd!", "result": { "areacode": "0796", "card": "江西联通GSM卡", "city": "吉安", "company": "中国联通", "province": "江西", "zip": "343000" }, "resultcode": "200"}
我们可以看到,JSON是由一个大括号括起来的,里面是键值对,每一个键对应一个值,当然,他里面还有一个result的大括号包裹着一堆数据,这里我推荐一个工具叫
我们来看他的构造
这里看起来就十分的清晰了,我们一层层的剥下来,这里要用到的就是我们org.json下的JSONObject类
/** * 解析Json * * @param json */ private void Volley_Json(String json) { try { JSONObject jsonObject = new JSONObject(json); JSONObject object = jsonObject.getJSONObject("result"); tv_content.setText("归属地:" + object.getString("province") + "-" + object.getString("city") + "\n" + "区号:" + object.getString("areacode") + "\n" + "运营商:" + object.getString("company") + "\n" + "用户类型:" + object.getString("card")); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } }
这里,我们可以看到,我们new一个JSONObject 并且把json穿进去解析,然后getJSONObject获取一个json里面的字段,再去用getString(name)去获取键得到值,所以运行结果
是不是没什么难度?那我们来稍微做一个难一点的,笑话大全
我们同样的,需要一个接口
http://japi.juhe.cn/joke/content/list.from?key=56e5f85c150ebd54461ae4fb7c6705ec&page=1&pagesize=1&sort=asc&time=1418745237
然后我们继续用Volley来解析这个接口得到Json
/** * 解析接口 */ private void Volley_Get() { String url = "http://japi.juhe.cn/joke/content/list.from?key=56e5f85c150ebd54461ae4fb7c6705ec&page=1&pagesize=1&sort=asc&time=1418745237"; RequestQueue queue = Volley.newRequestQueue(this); StringRequest request = new StringRequest(Method.PUBLIC, url, new Response.Listener() { // 成功 @Override public void onResponse(String json) { Log.i("Json", json); } }, new Response.ErrorListener() { // 失败 @Override public void onErrorResponse(VolleyError errorLog) { Log.e("Error", errorLog.toString()); } }); queue.add(request); }
这样,我们得到的JSON就是
{ "error_code": 0, "reason": "Success", "result": { "data": [ { "content": "大脑:别睡了快起来吧要迟到了。 身体:滚,别烦我我还要再躺会。 时间:你俩慢慢吵我先溜了。 尿:再不起我就出来了!", "hashId": "0ee18f8733dc6744e6db6d0312839e5b", "unixtime": 1462885431, "updatetime": "2016-05-10 21:03:51" } ] }}
我们需要的是中间的文字,但是这个json和之前那个json就有点不一样了,这个明显里面有一个数组,所以我们要用JSONArray数组来解析了,我们先来看一下结构
这个结构明显要复杂一些,就在Data里面他里面还有一个数组,所以我们解析起来就要先遍历一下了
/** * 解析Json * * @param json */ private void Volley_Json(String json) { try { JSONObject jsonObject = new JSONObject(json); JSONObject jsonObject2 = jsonObject.getJSONObject("result"); JSONArray ja = jsonObject2.getJSONArray("data"); for (int i = 0; i < ja.length(); i++) { JSONObject jsonObject3 = (JSONObject) ja.get(i); tv_content.setText(jsonObject3.getString("content")); } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } }
我们可以看到,我们是一层一层的去解析的,首先是解析得到最外面的result,返回的是一个JSONObject ,然后继续解析data,返回的是一个JSONArray,然后我们遍历一下 JSONObject jsonObject3 = (JSONObject) ja.get(i);强转成一个JSONObject ,解析到最后我们就可以直接getString(“content”)拿到数据了,是不是思路很清晰?我们看一下效果图
这个也是比较复杂的,也是我项目中有用到的,就是一个JSON里面有数组,数组里面也有数组,这样嵌套,其实说难也不难,只要掌握了思路,剩下的,只不过就是工作量的问题了
这里我们用到的接口是和风天气的接口
接口
https://api.heweather.com/x3/weather?city=%E6%B7%B1%E5%9C%B3&key=你的key
我们先用Volley解析接口
/** * 获取天气 * * @param city 城市名 */ private void getWeather(String city) { String url = "https://api.heweather.com/x3/weather?city=" + city + "&key=你的key"; RequestQueue queue = Volley.newRequestQueue(this); StringRequest request = new StringRequest(Request.Method.GET, url, new Response.Listener() { // 成功 @Override public void onResponse(String json) { Log.i("json", json); } }, new Response.ErrorListener() { // 失败 @Override public void onErrorResponse(VolleyError errorLog) { Log.e("Error", errorLog.toString()); } }); queue.add(request); }
这里,我们解析到了Json,有点长哦
{ "HeWeather data service 3.0": [ { "aqi": { "city": { "aqi": "60", "co": "1", "no2": "53", "o3": "46", "pm10": "65", "pm25": "42", "qlty": "良", "so2": "7" } }, "basic": { "city": "深圳", "cnty": "中国", "id": "CN101280601", "lat": "22.544000", "lon": "114.109000", "update": { "loc": "2016-05-10 22:07", "utc": "2016-05-10 14:07" } }, "daily_forecast": [ { "astro": { "sr": "05:45", "ss": "18:54" }, "cond": { "code_d": "301", "code_n": "101", "txt_d": "强阵雨", "txt_n": "多云" }, "date": "2016-05-10", "hum": "70", "pcpn": "25.4", "pop": "98", "pres": "1008", "tmp": { "max": "32", "min": "23" }, "vis": "7", "wind": { "deg": "216", "dir": "无持续风向", "sc": "微风", "spd": "4" } }, { "astro": { "sr": "05:44", "ss": "18:54" }, "cond": { "code_d": "101", "code_n": "300", "txt_d": "多云", "txt_n": "阵雨" }, "date": "2016-05-11", "hum": "64", "pcpn": "0.0", "pop": "13", "pres": "1008", "tmp": { "max": "29", "min": "23" }, "vis": "10", "wind": { "deg": "118", "dir": "无持续风向", "sc": "微风", "spd": "10" } }, { "astro": { "sr": "05:44", "ss": "18:55" }, "cond": { "code_d": "300", "code_n": "101", "txt_d": "阵雨", "txt_n": "多云" }, "date": "2016-05-12", "hum": "68", "pcpn": "0.1", "pop": "7", "pres": "1009", "tmp": { "max": "29", "min": "25" }, "vis": "10", "wind": { "deg": "129", "dir": "无持续风向", "sc": "微风", "spd": "7" } }, { "astro": { "sr": "05:44", "ss": "18:55" }, "cond": { "code_d": "101", "code_n": "302", "txt_d": "多云", "txt_n": "雷阵雨" }, "date": "2016-05-13", "hum": "69", "pcpn": "9.8", "pop": "53", "pres": "1011", "tmp": { "max": "29", "min": "23" }, "vis": "7", "wind": { "deg": "123", "dir": "无持续风向", "sc": "微风", "spd": "1" } }, { "astro": { "sr": "05:43", "ss": "18:56" }, "cond": { "code_d": "302", "code_n": "302", "txt_d": "雷阵雨", "txt_n": "雷阵雨" }, "date": "2016-05-14", "hum": "73", "pcpn": "5.3", "pop": "66", "pres": "1011", "tmp": { "max": "29", "min": "23" }, "vis": "10", "wind": { "deg": "115", "dir": "无持续风向", "sc": "微风", "spd": "10" } }, { "astro": { "sr": "05:43", "ss": "18:56" }, "cond": { "code_d": "302", "code_n": "302", "txt_d": "雷阵雨", "txt_n": "雷阵雨" }, "date": "2016-05-15", "hum": "69", "pcpn": "7.7", "pop": "58", "pres": "1009", "tmp": { "max": "29", "min": "22" }, "vis": "10", "wind": { "deg": "166", "dir": "无持续风向", "sc": "微风", "spd": "4" } }, { "astro": { "sr": "05:42", "ss": "18:57" }, "cond": { "code_d": "302", "code_n": "101", "txt_d": "雷阵雨", "txt_n": "多云" }, "date": "2016-05-16", "hum": "67", "pcpn": "1.8", "pop": "50", "pres": "1008", "tmp": { "max": "28", "min": "23" }, "vis": "10", "wind": { "deg": "10", "dir": "无持续风向", "sc": "微风", "spd": "8" } } ], "hourly_forecast": [ { "date": "2016-05-10 22:00", "hum": "89", "pop": "38", "pres": "1009", "tmp": "27", "wind": { "deg": "80", "dir": "东风", "sc": "微风", "spd": "4" } } ], "now": { "cond": { "code": "101", "txt": "多云" }, "fl": "28", "hum": "88", "pcpn": "0", "pres": "1008", "tmp": "25", "vis": "10", "wind": { "deg": "10", "dir": "南风", "sc": "3-4", "spd": "14" } }, "status": "ok", "suggestion": { "comf": { "brf": "较不舒适", "txt": "白天天气多云,同时会感到有些热,不很舒适。" }, "cw": { "brf": "不宜", "txt": "不宜洗车,路面积水较多,不宜擦洗汽车。如果执意擦洗,要做好溅上泥水的心理准备。" }, "drsg": { "brf": "热", "txt": "天气热,建议着短裙、短裤、短薄外套、T恤等夏季服装。" }, "flu": { "brf": "少发", "txt": "各项气象条件适宜,无明显降温过程,发生感冒机率较低。" }, "sport": { "brf": "较适宜", "txt": "天气较好,户外运动请注意防晒,推荐您在室内进行低强度运动。" }, "trav": { "brf": "适宜", "txt": "天气较好,但丝毫不会影响您出行的心情。温度适宜又有微风相伴,适宜旅游。" }, "uv": { "brf": "弱", "txt": "紫外线强度较弱,建议出门前涂擦SPF在12-15之间、PA+的防晒护肤品。" } } } ]}
这里,我们可以根据结构图来分析
这里我们可以看到,他本身就是一个数组,接着又是一个数组,数组里面包含着接下来七天的天气情况,这里呢,我们就不做的特别详细了,我们写三天 ,怎么写呢?看着哈
/** * 解析Json * * @param json */ private void Volley_Json(String json) { try { JSONObject jsonObject = new JSONObject(json); JSONArray jArray = jsonObject .getJSONArray("HeWeather data service 3.0"); for (int i = 0; i < jArray.length(); i++) { JSONObject jb1 = (JSONObject) jArray.get(i); JSONArray jr1 = jb1.getJSONArray("daily_forecast"); for (int j = 0; j < jr1.length(); j++) { JSONObject jb2 = (JSONObject) jr1.get(j); JSONObject jb3 = jb2.getJSONObject("tmp"); dateList.add(jb2.getString("date")); weatherList.add(jb2.getJSONObject("cond") .getString("txt_n")); TmpList.add(jb3.getString("min") + "-" + jb3.getString("max")); } } // 设置参数 today_date.setText(dateList.get(0)); today_weather.setText(weatherList.get(0)); today_tmp.setText(TmpList.get(0)); tomorrow_date.setText(dateList.get(1)); tomorrow_weather.setText(weatherList.get(1)); tomorrow_tmp.setText(TmpList.get(1)); after_date.setText(dateList.get(2)); after_weather.setText(weatherList.get(2)); after_tmp.setText(TmpList.get(2)); //设置图片 if (weatherList.get(0).equals("晴")) { today_img.setImageResource(R.mipmap.sun); } else if (weatherList.get(0).equals("多云")) { today_img.setImageResource(R.mipmap.cloudy); } else { today_img.setImageResource(R.mipmap.rain); } if (weatherList.get(1).equals("晴")) { tomorrow_img.setImageResource(R.mipmap.sun); } else if (weatherList.get(1).equals("多云")) { tomorrow_img.setImageResource(R.mipmap.cloudy); } else { tomorrow_img.setImageResource(R.mipmap.rain); } if (weatherList.get(2).equals("晴")) { arter_img.setImageResource(R.mipmap.sun); } else if (weatherList.get(2).equals("多云")) { arter_img.setImageResource(R.mipmap.cloudy); } else { arter_img.setImageResource(R.mipmap.rain); } } catch (JSONException e) { e.printStackTrace(); } //清空数据 dateList.clear(); weatherList.clear(); TmpList.clear(); }
这里代码虽然多,但是后半部分基本上可以不看,就是设置数据和图片的,我们这里同样的getJSONArray获取到整个数组,然后开始遍历这个数组,强转为JSONObject 之后我们再次的获取每天的小数组daily_forecast,到这里,就和上面一样了,我们又强转为JSONObject 就可以开始getString(name)了,但是我们这里要获取三天的数据,所以我用一个List装起来,然后拿出来设置到TextView上,然后再根据天气设置图片,最后,清空一下List,因为他每次请求我们都是只获取他的前三天数据,所以运行的结果就是这样:
是不是这篇博客挺实用的,如果觉得好的话,可以点个赞哟,谢谢大家了