Android使用okhttpfinal+gson实现网络请求

近期整理了[okhttpfinal][6]+[gson][6] 实现网络请求和解析功能，特做此笔记：

代码部分

首先需要在build.gradle中导入包okhttpfinal，gson：

compile 'com.google.code.gson:gson:2.2.4'compile 'com.jakewharton:butterknife:7.0.0'

在使用okhttpfinal之前需要初始化，建议放到Application中

         /**         * 初始化OkHttpFinal         */        OkHttpFinalConfiguration.Builder builder = new OkHttpFinalConfiguration.Builder();        //设置请求超时时间        builder.setTimeout(60000);        //初始化OkHttpFinalConfiguration        OkHttpFinal.getInstance().init(builder.build());

创建IRequestCallback接口用来返回请求状态

public interface IRequestCallback<T> {    /**     * 执行网络访问之前的操作     */    void onStart(String msg);    /**     * 返回结果错误或解析失败     */    void onFailed(String msg);    /**     * 返回结果成功或解析成功     */    void onSuccessed(T t);}

构建RequestParamsBuilder请求头类，用来封装公共请求头

public class RequestParamsBuilder {    public static RequestParams buildRequestParams(HttpCycleContext context) {        String token = "";        RequestParams params = new RequestParams(context);        /**         * 公共请求头         */        params.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");        /**         * 登录状态的token         *///        params.addFormDataPart("token","token");        return params;    }    /**     * 服务端返回错误信息，解析得到message     * 如果返回数据解析异常时可调用该方法     */    public static String getMessage(String errorJson) {        try {            Gson gson = new Gson();            NetErrorBean errorBean = gson.fromJson(errorJson, NetErrorBean.class);            String errorMsg = errorBean.getMessage();            errorMsg = errorMsg == null ? "" : errorJson;            return errorMsg;        } catch (Exception e) {            return e.getMessage();        }    }}

至于NetErrorBean类里面只包括了
/**
* key :
* message :
*/

创建RequestServer类

public class RequestServer {    private HttpCycleContext context;    public RequestServer(HttpCycleContext context) {        this.context = context;    }    //传字符串参数    public void getRequestServer(String request, IRequestCallback<DataResponse> callback) {        RequestParams requestParams = RequestParamsBuilder.buildRequestParams(context);        requestParams.addFormDataPart("request", request);        getRequestServer(requestParams,callback);    }    //直接请求对象的参数    public void getRequestServer(RequestParams params, final IRequestCallback<DataResponse> call) {        final String msg = "";        HttpRequest.get("http://wthrcdn.etouch.cn/weather_mini?", params, new BaseHttpRequestCallback() {            @Override            public void onStart() {                super.onStart();                if (call != null) {                    call.onStart(msg);                }            }            @Override            public void onResponse(String response, Headers headers) {                super.onResponse(response, headers);                if (response != null) {                    try {                        Gson gson = new Gson();                        DataResponse dataResponse = gson.fromJson(response, DataResponse.class);                        /**                         * 如果返回的是该类型的list数据，使用如下方法                         *///                        List<DataResponse> dataResponses = gson.fromJson(response,new TypeToken<List<DataResponse>>(){}.getType());                        if (dataResponse != null) {                            if (dataResponse.getDesc() != null) {                                int code = dataResponse.getStatus();                                if (code==1000) {                                    call.onSuccessed(dataResponse);                                } else {                                    call.onFailed(dataResponse.getDesc());                                }                            }                        }                    } catch (JsonSyntaxException e) {                        e.printStackTrace();                        //异常中可以处理解析失败的json串                        //call.onFailed(RequestParamsBuilder.getMessage(response));                        call.onFailed(e.getMessage());                    }                }            }            @Override            public void onFailure(int errorCode, String msg) {                super.onFailure(errorCode, msg);                if (call!=null){                    call.onFailed(msg);                }            }            @Override            public void onFinish() {                super.onFinish();                /**                 * 请求结束,不管成功与否都会执行,可在此处写dialog消失逻辑等等                 */            }        });    }}

哦，还需要一个解析返回json串的对象，创建DataResponse类
这是天气预报请求的数据，该类里面有两个重写的方法（clone，equals）可以注意下，虽然这里没什么卵用

public class DataResponse implements Serializable,Cloneable{    /**     * data : {"yesterday":{"date":"21日星期日","high":"高温 31℃","fx":"南风","low":"低温 18℃","fl":"3-4级","type":"多云"},"city":"北京","aqi":"33","forecast":[{"date":"22日星期一","high":"高温 18℃","fengli":"3-4级","low":"低温 13℃","fengxiang":"东北风","type":"小到中雨"},{"date":"23日星期二","high":"高温 28℃","fengli":"微风级","low":"低温 14℃","fengxiang":"南风","type":"晴"},{"date":"24日星期三","high":"高温 32℃","fengli":"3-4级","low":"低温 17℃","fengxiang":"西南风","type":"多云"},{"date":"25日星期四","high":"高温 33℃","fengli":"3-4级","low":"低温 16℃","fengxiang":"南风","type":"晴"},{"date":"26日星期五","high":"高温 32℃","fengli":"微风级","low":"低温 18℃","fengxiang":"南风","type":"晴"}],"ganmao":"相对于今天将会出现大幅度降温，易发生感冒，注意增加衣服，加强自我防护避免感冒。","wendu":"16"}     * status : 1000     * desc : OK     */    private DataBean data;    private int status;    private String desc;    public DataBean getData() {        return data;    }    public void setData(DataBean data) {        this.data = data;    }    public int getStatus() {        return status;    }    public void setStatus(int status) {        this.status = status;    }    public String getDesc() {        return desc;    }    public void setDesc(String desc) {        this.desc = desc;    }    public static class DataBean {        /**         * yesterday : {"date":"21日星期日","high":"高温 31℃","fx":"南风","low":"低温 18℃","fl":"3-4级","type":"多云"}         * city : 北京         * aqi : 33         * forecast : [{"date":"22日星期一","high":"高温 18℃","fengli":"3-4级","low":"低温 13℃","fengxiang":"东北风","type":"小到中雨"},{"date":"23日星期二","high":"高温 28℃","fengli":"微风级","low":"低温 14℃","fengxiang":"南风","type":"晴"},{"date":"24日星期三","high":"高温 32℃","fengli":"3-4级","low":"低温 17℃","fengxiang":"西南风","type":"多云"},{"date":"25日星期四","high":"高温 33℃","fengli":"3-4级","low":"低温 16℃","fengxiang":"南风","type":"晴"},{"date":"26日星期五","high":"高温 32℃","fengli":"微风级","low":"低温 18℃","fengxiang":"南风","type":"晴"}]         * ganmao : 相对于今天将会出现大幅度降温，易发生感冒，注意增加衣服，加强自我防护避免感冒。         * wendu : 16         */        private YesterdayBean yesterday;        private String city;        private String aqi;        private String ganmao;        private String wendu;        private List<ForecastBean> forecast;        public YesterdayBean getYesterday() {            return yesterday;        }        public void setYesterday(YesterdayBean yesterday) {            this.yesterday = yesterday;        }        public String getCity() {            return city;        }        public void setCity(String city) {            this.city = city;        }        public String getAqi() {            return aqi;        }        public void setAqi(String aqi) {            this.aqi = aqi;        }        public String getGanmao() {            return ganmao;        }        public void setGanmao(String ganmao) {            this.ganmao = ganmao;        }        public String getWendu() {            return wendu;        }        public void setWendu(String wendu) {            this.wendu = wendu;        }        public List<ForecastBean> getForecast() {            return forecast;        }        public void setForecast(List<ForecastBean> forecast) {            this.forecast = forecast;        }        public static class YesterdayBean {            /**             * date : 21日星期日             * high : 高温 31℃             * fx : 南风             * low : 低温 18℃             * fl : 3-4级             * type : 多云             */            private String date;            private String high;            private String fx;            private String low;            private String fl;            private String type;            public String getDate() {                return date;            }            public void setDate(String date) {                this.date = date;            }            public String getHigh() {                return high;            }            public void setHigh(String high) {                this.high = high;            }            public String getFx() {                return fx;            }            public void setFx(String fx) {                this.fx = fx;            }            public String getLow() {                return low;            }            public void setLow(String low) {                this.low = low;            }            public String getFl() {                return fl;            }            public void setFl(String fl) {                this.fl = fl;            }            public String getType() {                return type;            }            public void setType(String type) {                this.type = type;            }        }        public static class ForecastBean {            /**             * date : 22日星期一             * high : 高温 18℃             * fengli : 3-4级             * low : 低温 13℃             * fengxiang : 东北风             * type : 小到中雨             */            private String date;            private String high;            private String fengli;            private String low;            private String fengxiang;            private String type;            public String getDate() {                return date;            }            public void setDate(String date) {                this.date = date;            }            public String getHigh() {                return high;            }            public void setHigh(String high) {                this.high = high;            }            public String getFengli() {                return fengli;            }            public void setFengli(String fengli) {                this.fengli = fengli;            }            public String getLow() {                return low;            }            public void setLow(String low) {                this.low = low;            }            public String getFengxiang() {                return fengxiang;            }            public void setFengxiang(String fengxiang) {                this.fengxiang = fengxiang;            }            public String getType() {                return type;            }            public void setType(String type) {                this.type = type;            }        }    }    /**     * 对象克隆，代码中使用dataResponse.clone()方法快速克隆对象，     * @return     * @throws CloneNotSupportedException     */    @Override    protected Object clone() throws CloneNotSupportedException {        DataResponse dataResponse=(DataResponse) super.clone();        return dataResponse;    }    /**     * 使用城市（唯一性的标识）判断两个数据对象是否一致     *  使用该类集合调用contains方法判断是否存在该对象     * @param o     * @return     */    @Override    public boolean equals(Object o) {        if(o instanceof DataResponse){            DataResponse dataResponse=(DataResponse) o;            //三元运算符：如果city是null直接返回false，如果不是返回是否相同            return this.getData().city==null?false:this.getData().city.equals(dataResponse.getData().city);        }        return false;    }    @Override    public int hashCode() {        int result = data != null ? data.hashCode() : 0;        result = 31 * result + status;        result = 31 * result + (desc != null ? desc.hashCode() : 0);        return result;    }}

准备工作结束，下面在主activity中实现HttpCycleContext

//请求之前private RequestServer requestServer;requestServer = new RequestServer(this);//网络请求OKhttpsendRequest();

//sendRequest方法实现网络请求和返回数据处理private void sendRequest() {        RequestParams params = new RequestParams();//        Gson gson=new Gson();//        DataRequest dataRequest=new DataRequest();//        dataRequest.setUsername("name");//        String Strparams=gson.toJson(dataRequest);        params.addFormDataPart("city", "北京");        requestServer.getRequestServer(params, new IRequestCallback<DataResponse>() {            @Override            public void onStart(String msg) {                /**                 * 开始请求                 */            }            @Override            public void onFailed(String msg) {                /**                 * 返回失败                 */            }            @Override            public void onSuccessed(DataResponse dataResponse) {                /**                 * 成功                 *///                Gson gson=new Gson();                if (dataResponse.getData().getGanmao() != null) {                    text_wenzi.setText(dataResponse.getData().getGanmao().toString());                }            }        });    }