关于项目中的一些经验：封装activity、service的基类，封装数据对象

经验一，将几个页面公用的数据，和方法进行封装，形成一个baseActivity的类：

package com.ctbri.weather.control;

import java.util.ArrayList;
import java.util.HashMap;

import com.ctbri.weather.domain.AirInfo;
import com.ctbri.weather.domain.AlertInfos;
import com.ctbri.weather.domain.LifeIndex;
import com.ctbri.weather.domain.MainData;
import com.ctbri.weather.domain.WeatherInfo;
import com.ctbri.weather.utils.DataParser;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Window;
import android.view.WindowManager;
import android.widget.EditText;
import android.widget.Toast;

public class BaseActivity extends Activity {

    public static Resources res; // 通锟斤拷锟斤拷源锟斤拷写
    // 锟斤拷锟斤拷锟斤拷锟斤拷锟较�拷锟絪p
    public static SharedPreferences forecastSP;
    // 锟斤拷锟斤拷没锟斤拷锟斤拷玫锟絪p
    public static SharedPreferences userConfig;
    
    protected static SharedPreferences settingConfig;
    
    //共享所有的城市信息
    public static HashMap<String, MainData> mAllInfos = new HashMap<String, MainData>();
    
    public static ArrayList<String> cityCodes;
    public static boolean weather_refresh;
    public static boolean trend_refresh;
    public static boolean life_refresh;
    public static int choice_page;
    /**
     *给所有共享的数据赋值
     */
    public static void  initAllData(){
        cityCodes = DataParser.getOrder(userConfig, "cityCodes");
        if(cityCodes!=null&&cityCodes.size()>0){
            for (int i = 0; i < cityCodes.size(); i++) {
                String cityCode = cityCodes.get(i);
                AirInfo airInfo = DataParser.getAirInfo(forecastSP, cityCode);
                ArrayList<AlertInfos> alerts = DataParser.getAlert(forecastSP,
                        cityCode);
                HashMap<String, WeatherInfo> weatherInfos = DataParser
                        .getWeatherInfo(forecastSP, cityCode);
                LifeIndex dressIndex = DataParser.getDressIndex(forecastSP,
                        cityCode);
                MainData data = new MainData(airInfo, alerts, weatherInfos, dressIndex);
                mAllInfos.put(cityCode, data);
            }
        }
    }
    
    public static void addCityInfo(String cityCode,MainData cityInfo ){
        mAllInfos.put(cityCode, cityInfo);
    }
    public static void removeCityInfo(String cityCode){
        mAllInfos.remove(cityCode);
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //设置窗口没有标题
        requestWindowFeature(Window.FEATURE_NO_TITLE);// 锟斤拷锟斤拷示锟斤拷锟斤拷

        super.onCreate(savedInstanceState);
        
        settingConfig = getSharedPreferences(Constant.APP_SETTING,Context.MODE_PRIVATE);
        res = getResources(); // 通锟斤拷锟斤拷源锟斤拷写
          initAllData();
        // 锟脚伙拷锟斤拷锟诫法模式
        int inputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN;
        //设置屏幕键盘的相关属性
        getWindow().setSoftInputMode(inputMode);
    }

    /**
     * 判断字符串是否为null，""或者"NULL","null"
     * 
     * @param str
     * @return 为锟秸凤拷锟斤拷true,锟斤拷为锟秸凤拷锟斤拷false
     */
    public boolean isNull(String str) {
        if (null == str || "".equals(str) || "null".equalsIgnoreCase(str)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * 锟斤拷锟斤拷址锟斤拷欠锟斤拷锟斤拷址锟�
     * 
     * @param str
     * @return 如果字符串不为空，返回true,否则返回false
     */
    public boolean isStr(String str) {
        return !isNull(str);
    }

    /**
     * 锟接碉拷前activity锟斤拷转锟斤拷目锟斤拷activity,<br>
     * 锟斤拷锟侥匡拷锟絘ctivity锟斤拷蚩�锟�锟斤拷锟斤拷锟斤拷展锟斤拷,<br>
     * 锟斤拷锟斤拷锟斤拷没锟津开癸拷,锟斤拷锟铰斤拷一锟斤拷锟斤拷
     * 
     * @param cls
     */
    public void gotoExistActivity(Class<?> cls) {
        Intent intent;
        intent = new Intent(this, cls);
     
        intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
        
        startActivity(intent);
    }

    /**
     * 锟铰斤拷一锟斤拷activity锟斤拷
     * 
     * @param cls
     */
    public void gotoActivity(Class<?> cls) {
        Intent intent;
        intent = new Intent(this, cls);
        startActivity(intent);
    }

    /**
     * 通锟斤拷锟斤拷息锟斤拷示
     * 
     * @param resId
     */
    public void toast(int resId) {
        Toast.makeText(this, resId, Toast.LENGTH_SHORT).show();
    }

    /**
     * 通锟斤拷锟斤拷息锟斤拷示
     * 
     * @param resId
     */
    public void  toast(String msg) {
        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
    }

    /**
     * 锟斤拷锟斤拷源锟斤拷取锟街凤拷
     * 
     * @param resId
     * @return
     */
    public String getStr(int resId) {
        return res.getString(resId);
    }
    
    /**
     * 锟斤拷EditText 锟斤拷取锟街凤拷
     * 
     * @param editText
     * @return
     */
    public String getStr(EditText editText) {
        return editText.getText().toString();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        switch (keyCode) {
        case KeyEvent.KEYCODE_BACK:
            this.finish();
        }
        return super.onKeyDown(keyCode, event);
    }
}


经验二，将所有的数据对象进行封装，而且可能不仅仅是封装为一个对象（单数），同时还封装对象集合（复数）；例如：

package com.ctbri.weather.domain;

import java.io.Serializable;

public class WeatherInfo implements Serializable {
    //    δ���е����
    private int weatherFutureId;
    
    private String htmp;
    private String ltmp;
    private String hwd;
    private String lwd;
    private String wl;
    private String hum;
    private String sr;
    private String ss;
    private String vacation;
    private String lastVacationTip;
    private int weatherTodayId;
    private String id;
    //���������
    private String wd;
    private String wld;
    private String weatherDayPic;
    private String weatherNightPic;
    
    //���� �������������
    private String cityName;
    private String cityCode;
    private String ctmp;
    private String weatherDescription;
    private String lastFestivalTip;
    private long publishTime;
    private long weatherDate;
    
    /**
     * ���졢����Ĺ��췽��
     */
    
    public WeatherInfo(String htmp, String ltmp, String hwd, String lwd,
            String wl, String hum, String sr, String ss, String vacation,
            String lastVacationTip, int weatherTodayId, String id,
            String weatherDayPic, String weatherNightPic, String cityName,
            String cityCode, long weatherDate, String ctmp,
            String weatherDescription, String lastFestivalTip, long publishTime ,String wd,String wld) {
        this.wd = wd;
        this.wld = wld; 
        this.htmp = htmp;
        this.ltmp = ltmp;
        this.hwd = hwd;
        this.lwd = lwd;
        this.wl = wl;
        this.hum = hum;
        this.sr = sr;
        this.ss = ss;
        this.vacation = vacation;
        this.lastVacationTip = lastVacationTip;
        this.weatherTodayId = weatherTodayId;
        this.id = id;
        this.weatherDayPic = weatherDayPic;
        this.weatherNightPic = weatherNightPic;
        this.cityName = cityName;
        this.cityCode = cityCode;
        this.weatherDate = weatherDate;
        this.ctmp = ctmp;
        this.weatherDescription = weatherDescription;
        this.lastFestivalTip = lastFestivalTip;
        this.publishTime = publishTime;
    }
    /**
     * δ������Ĺ��췽��
     */
    public WeatherInfo(String cityName ,int weatherFutureId, String htmp, String ltmp,
            String hwd, String lwd, String wl, String hum, String sr,
            String ss, String vacation, String lastVacationTip,
            int weatherTodayId, String id, String weatherDayPic,
            String weatherNightPic,String wd,String wld) {
        this.cityName = cityName;
        this.wd = wd;
        this.wld = wld; 
        this.weatherFutureId = weatherFutureId;
        this.htmp = htmp;
        this.ltmp = ltmp;
        this.hwd = hwd;
        this.lwd = lwd;
        this.wl = wl;
        this.hum = hum;
        this.sr = sr;
        this.ss = ss;
        this.vacation = vacation;
        this.lastVacationTip = lastVacationTip;
        this.weatherTodayId = weatherTodayId;
        this.id = id;
        this.weatherDayPic = weatherDayPic;
        this.weatherNightPic = weatherNightPic;
    }
    
    public String getWd() {
        return wd;
    }
    public void setWd(String wd) {
        this.wd = wd;
    }
    public String getWld() {
        return wld;
    }
    public void setWld(String wld) {
        this.wld = wld;
    }
    public String getCityName() {
        return cityName;
    }
    public void setCityName(String cityName) {
        this.cityName = cityName;
    }
    public String getCityCode() {
        return cityCode;
    }
    public void setCityCode(String cityCode) {
        this.cityCode = cityCode;
    }
    public long getWeatherDate() {
        return weatherDate;
    }
    public void setWeatherDate(long weatherDate) {
        this.weatherDate = weatherDate;
    }
    public String getCtmp() {
        return ctmp;
    }
    public void setCtmp(String ctmp) {
        this.ctmp = ctmp;
    }
    public String getWeatherDescription() {
        return weatherDescription;
    }
    public void setWeatherDescription(String weatherDescription) {
        this.weatherDescription = weatherDescription;
    }
    public String getLastFestivalTip() {
        return lastFestivalTip;
    }
    public void setLastFestivalTip(String lastFestivalTip) {
        this.lastFestivalTip = lastFestivalTip;
    }
    public long getPublishTime() {
        return publishTime;
    }
    public void setPublishTime(long publishTime) {
        this.publishTime = publishTime;
    }
    public String getWeatherDayPic() {
        return weatherDayPic;
    }
    public void setWeatherDayPic(String weatherDayPic) {
        this.weatherDayPic = weatherDayPic;
    }
    public String getWeatherNightPic() {
        return weatherNightPic;
    }
    public void setWeatherNightPic(String weatherNightPic) {
        this.weatherNightPic = weatherNightPic;
    }
    public int getWeatherFutureId() {
        return weatherFutureId;
    }
    public void setWeatherFutureId(int weatherFutureId) {
        this.weatherFutureId = weatherFutureId;
    }
    public String getHtmp() {
        return htmp;
    }
    public void setHtmp(String htmp) {
        this.htmp = htmp;
    }
    public String getLtmp() {
        return ltmp;
    }
    public void setLtmp(String ltmp) {
        this.ltmp = ltmp;
    }
    public String getHwd() {
        return hwd;
    }
    public void setHwd(String hwd) {
        this.hwd = hwd;
    }
    public String getLwd() {
        return lwd;
    }
    public void setLwd(String lwd) {
        this.lwd = lwd;
    }
    public String getWl() {
        return wl;
    }
    public void setWl(String wl) {
        this.wl = wl;
    }
    public String getHum() {
        return hum;
    }
    public void setHum(String hum) {
        this.hum = hum;
    }
    public String getSr() {
        return sr;
    }
    public void setSr(String sr) {
        this.sr = sr;
    }
    public String getSs() {
        return ss;
    }
    public void setSs(String ss) {
        this.ss = ss;
    }
    public String getVacation() {
        return vacation;
    }
    public void setVacation(String vacation) {
        this.vacation = vacation;
    }
    public String getLastVacationTip() {
        return lastVacationTip;
    }
    public void setLastVacationTip(String lastVacationTip) {
        this.lastVacationTip = lastVacationTip;
    }
    public int getWeatherTodayId() {
        return weatherTodayId;
    }
    public void setWeatherTodayId(int weatherTodayId) {
        this.weatherTodayId = weatherTodayId;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    
}

对应的集合为：

package com.ctbri.weather.domain;

import java.util.ArrayList;

public class WeatherInfos {
    public WeatherInfoToday weatherinfotoday;
    public ArrayList<WeatherInfoFutureandHistory> WeatherInfoFutureandHistory=new ArrayList<WeatherInfoFutureandHistory>();
    public ArrayList<AlertInfo> AlertInfo=new ArrayList<AlertInfo>();
    public ArrayList<LivingInfo> LivingInfo=new ArrayList<LivingInfo>();
    public ArrayList<AirInfo> AirInfo=new ArrayList<AirInfo>();
    
}

这样在数据解析的时候就能够直接返回对应的对象：

public static HashMap<String, WeatherInfo> getWeatherInfo(
            SharedPreferences forecast, String cityCode) {
        HashMap<String, WeatherInfo> weatherInfos = new HashMap<String, WeatherInfo>();
        try {
            String cityInfo = forecast.getString(cityCode, "");
            JSONObject jCityInfo = new JSONObject(cityInfo);
            JSONArray jWeatherInfo = jCityInfo.getJSONArray("weatherinfos");
            String furCityName = "";
            for (int i = 0; i < jWeatherInfo.length(); i++) {
                if(jWeatherInfo.getJSONObject(i)!=null){
                        JSONObject jsonObject = jWeatherInfo.getJSONObject(i);
                        String id = jsonObject.getString("id");
                        String htmp = jsonObject.getString("htmp");
                        String ltmp = jsonObject.getString("ltmp");
                        String hwd = jsonObject.getString("hwd");
                        String lwd = jsonObject.getString("lwd");
                        String wl = jsonObject.getString("wl");
                        String hum = jsonObject.getString("hum");
                        String sr = jsonObject.getString("sr");
                        String ss = jsonObject.getString("ss");
                        String vacation = jsonObject.getString("vacation");
                        String weatherDayPic = jsonObject.getString("weatherDayPic");
                        String weatherNightPic = jsonObject
                                .getString("weatherNightPic");
                        String wd = jsonObject.getString("wd");
                        String wld = jsonObject.getString("wld");
                        String lastVacationTip = jsonObject
                                .getString("lastVacationTip");
                    
                        int weatherTodayId = jsonObject.getInt("weatherTodayId");
                        if (i < 2) {// 锟斤拷锟斤拷锟斤拷 锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟较�拷锟斤拷蟹锟阶�
                            String cityName = jsonObject.getString("cityName");
                            furCityName = cityName;
                            String ctmp = jsonObject.getString("ctmp");
                            String weatherDescription = jsonObject
                                    .getString("weatherDescription");
                            String lastFestivalTip = jsonObject
                                    .getString("lastFestivalTip");
                            long publishTime = jsonObject.getLong("publishTime");
                            long weatherDate = jsonObject.getLong("weatherDate");
                            WeatherInfo weatherInfo = new WeatherInfo(htmp, ltmp, hwd,
                                    lwd, wl, hum, sr, ss, vacation, lastVacationTip,
                                    weatherTodayId, id, weatherDayPic, weatherNightPic,
                                    cityName, cityCode, weatherDate, ctmp,
                                    weatherDescription, lastFestivalTip, publishTime,
                                    wd, wld);
                            weatherInfos.put(id, weatherInfo);
                        } else {// 未锟斤拷锟斤拷锟斤拷锟斤拷锟侥凤拷装
                            int weatherFutureId = jsonObject.getInt("weatherFutureId");
                            WeatherInfo weatherInfo = new WeatherInfo(furCityName,weatherFutureId,
                                    htmp, ltmp, hwd, lwd, wl, hum, sr, ss, vacation,
                                    lastVacationTip, weatherTodayId, id, weatherDayPic,
                                    weatherNightPic, wd, wld);
                            weatherInfos.put(id, weatherInfo);
                        }
                }else{
                    System.out.println("niemei!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
                }
            }
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            //锟斤拷锟斤拷锟斤拷锟斤拷锟届常锟斤拷锟斤拷蛹锟斤拷锟斤拷
                for (int i = 0; i < 6; i++) {
                    WeatherInfo weatherInfo = new WeatherInfo("100", "0", "多云", "多云", "3-4", "46%", "", "", "", "", 0, i+"", "1", "2",  new CityManagerDatabase(WeatherApplication.mContext).getCityName(cityCode), "101010100", 0, "28", "天气热，建议着短裙、短裤、短薄外套、T恤等夏季服装", "", 1, "南风", "南风3-4级转微风");
                    weatherInfos.put(i+"", weatherInfo);
            }
        }
        return weatherInfos;
    }
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原文地址：https://www.cnblogs.com/bobodeboke/p/3185542.html