[整理]Android开发（二）-Weather App

private class WeatherData{

private String _weatherDescription;

private Integer _currentTemperature;

private Integer _LowTemperature;

private Integer _highTemperature;
    public WeatherData(String weatherDescription,Integer currentTemperature, Integer LowTemperature, Integer highTemperature){

        _weatherDescription = weatherDescription;

        _currentTemperature = currentTemperature;

        _LowTemperature = LowTemperature;

        _highTemperature = highTemperature;

    }

    public String getWeatherDescription(){

        return _weatherDescription;

    }

    public Integer getCurrentTemperature(){

        return _currentTemperature;

    }

    public Integer getLowTemperature(){

        return _LowTemperature;

    }

    public Integer getHighTemperature(){

        return _highTemperature;

    }

}

//异步获取天气数据，并更新主UI线程

private class HttpRequestAsyncTask extends AsyncTask{

    private WeatherData loadWeatherData(String requestUrl){

        WeatherData weatherData = null;

        String dataResponse = null;

        //通过API，获取天气数据

        try{

            URL url = new URL(requestUrl);

            HttpURLConnection conn = (HttpURLConnection)url.openConnection();

            //conn.setConnectTimeout(10000);

            conn.setDoInput(true);

            conn.setDoOutput(true);

            conn.setUseCaches(false);

            conn.setRequestMethod("GET");

            conn.setRequestProperty("apikey","XXX");

            conn.connect();

            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(),"utf-8"));

            StringBuffer buffer = new StringBuffer();

            String lineBuffer = null;

            while((lineBuffer=reader.readLine()) != null){

                buffer.append(lineBuffer);

            }

            reader.close();

            conn.disconnect();

            dataResponse = buffer.toString();

        }

        catch (Exception ex){

            ex.printStackTrace();

            System.out.println("error->"+ex.getMessage());

        }

        //解析对返回的json数据

        /** api return value

         *  {

                 "errNum": 0,

                 "errMsg": "success",

                 "retData": {

                     "city": "上海",

                     "pinyin": "shanghai",

                     "citycode": "101020100",

                     "date": "15-06-03",

                     "time": "11:00",

                     "postCode": "200000",

                     "longitude": 121.445,

                     "latitude": 31.213,

                     "altitude": "19",

                     "weather": "阴",

                     "temp": "25",

                     "l_tmp": "20",

                     "h_tmp": "25",

                     "WD": "东北风",

                     "WS": "微风(<10m/h)",

                     "sunrise": "04:50",

                     "sunset": "18:54"

                 }

             }

         * */

        try{

            JSONTokener jsonParser = new JSONTokener(dataResponse);

            JSONObject weatherInfo = (JSONObject)jsonParser.nextValue();

            int returnValue =  weatherInfo.getInt("errNum");

            if(returnValue != 0){

                System.out.println( "api get error->" + returnValue);

            }

            else{

                JSONObject jsonData = weatherInfo.getJSONObject("retData");

                weatherData = new WeatherData(jsonData.getString("weather"),jsonData.getInt("temp"),jsonData.getInt("l_tmp"),jsonData.getInt("h_tmp"));

            }

        }

        catch (JSONException ex){

            ex.printStackTrace();

            System.out.println( "api get error->" + ex.getMessage());

        }

        return weatherData;

    }

    @Override

    protected Object doInBackground(Object[] params) {

        String requestUrl = params[0].toString();

        return this.loadWeatherData(requestUrl);

    }

    @Override

    protected void onPostExecute(Object o) {

        if(o==null){

            AlertDialog.Builder alertBuilder = new AlertDialog.Builder(MainActivity.this);

            alertBuilder.setTitle(R.string.alert_title_load_weather_failed)

                    .setMessage(R.string.alert_message_load_weather_failed);

            alertBuilder.create();

        }

        else{

            //super.onPostExecute(o);

            WeatherData weatherData = (WeatherData)o;

            //更新UI

            CurrentTempratureTextView.setText(weatherData.getCurrentTemperature()+"℃");

        }

    }

}
巴特西

[整理]Android开发（二）-Weather App

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