分分钟使用Retrofit+Rxjava实现网络请求
撸代码之前,先简单了解一下为什么Retrofit这么受大家青睐吧。🧐🧐🧐
Retrofit是Square公司出品的基于OkHttp封装的一套RESTful(目前流行的一套api设计的风格)网络请求框架。它内部使用了大量的设计模式,以达到高度解耦的目的;它可以直接通过注解的方式配置请求;可以使用不同的Http客户端;还可以使用json Converter序列化数据,直接转换成你期望生成的实体bean;它还支持Rxjava等等等(此处省略一万字.....🤪🤪🤪)
好了,接下来开始我们就开始上代码,写个小Demo测试一下它的使用吧!
使用步骤:
1、app的build文件中加入:
//only Retrofit(只用Retrofit联网)
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
//Rxjava and Retrofit(Retrofit+Rx需要添加的依赖)
compile 'com.squareup.retrofit2:adapter-rxjava:2.1.0'
compile 'io.reactivex:rxandroid:1.2.1'
compile 'io.reactivex:rxjava:1.2.1'
2、接下来就要编写实现retrofit联网的代码了,以Get请求为例,示例接口:(http://wthrcdn.etouch.cn/weather_mini?city=北京)
首先,你需要创建一个interface用来配置网络请求。
写法《一》:单纯使用Retrofit,不加Rxjava的使用
/**
* 描述:第一步:定义一个接口配置网络请求
*/
public interface WeatherService {
// 网络接口的使用为查询天气的接口
//
@GET("weather_mini")
// 此处回调返回的可为任意类型Call<T>,再也不用自己去解析json数据啦!!!
Call<WeatherEntity> getMessage(@Query("city") String city);
在需要请求网络的地方直接调用下面的方法即可:
/**
* 单纯使用Retrofit的联网请求
*/
private void doRequestByRetrofit() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(API.BASE_URL)//基础URL 建议以 / 结尾
.addConverterFactory(GsonConverterFactory.create())//设置 Json 转换器
.build();
WeatherService weatherService = retrofit.create(WeatherService .class);
Call<WeatherEntity> call = weatherService.getMessage("北京");
call.enqueue(new Callback<WeatherEntity>() {
@Override
public void onResponse(Call<WeatherEntity> call, Response<WeatherEntity> response) {
//测试数据返回
WeatherEntity weatherEntity = response.body();
Log.e("TAG", "response == " + weatherEntity.getData().getGanmao());
}
@Override
public void onFailure(Call<WeatherEntity> call, Throwable t) {
Log.e("TAG", "Throwable : " + t);
}
});
}
写法《二》 Retrofit + Rxjava
区别:使用Rxjava后,返回的不是Call<T>而是一个Observable<T>的对象了。
public interface RxWeatherService {
@GET("weather_mini")
Observable<WeatherEntity> getMessage(@Query("city") String city);
}
请求联网代码:
private void doRequestByRxRetrofit() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(API.BASE_URL)//基础URL 建议以 / 结尾
.addConverterFactory(GsonConverterFactory.create())//设置 Json 转换器
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())//RxJava 适配器
.build();
RxWeatherService rxjavaService = retrofit.create(RxWeatherService .class);
rxjavaService .getMessage("北京")
.subscribeOn(Schedulers.io())//IO线程加载数据
.observeOn(AndroidSchedulers.mainThread())//主线程显示数据
.subscribe(new Subscriber<WeatherEntity>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(WeatherEntity weatherEntity) {
Log.e("TAG", "response == " + weatherEntity.getData().getGanmao());
}
});
}
免费赠送一个WeatherEntity实体类(只给偷懒的小伙伴):
(在浏览器打开http://wthrcdn.etouch.cn/weather_mini?city=北京,取到json串直接用GsonFormat生成即可)
public class WeatherEntity {
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 {
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 {
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 {
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;
}
}
}
}
好了,简单的Retrofit+Rxjava实现联网到此就完成了。本文主要针对初接触retrofit的开发童鞋,如果对你有所帮助,不要忘了点个赞哦!
后续会更新Retrofit+Rxjava在实际项目开发中的运用,可以直接拿来在项目中使用噢.......敬请期待🤔🤔🤔🤔🤔🤔