浅谈我为什么选择用Retrofit作为我的网络请求框架

比较AsyncTask、Volley、Retrofit三者的请求时间

Retrofit2.0 完胜

使用

添加依赖

请求范例

声明接口

public interface ApiControl {

//@Query注解的作用理解为查询条件，这里表示需要查询的字段为ip
//ResponseBody是Retrofit自带的返回类，
@GET("http://ip.taobao.com/service/getIpInfo.php")
Call<ResponseBody> getIpInfo(@Query("ip") String ip);
}

调用接口

//创建Retrofit实例
Retrofit retrofit = new Retrofit.Builder()
//当我们的@GET()里有url时，这个baseUrl无效。但是这个必须要填，不然会报错，神奇。
.baseUrl("http://www.taobao.com.cn/")
.build();

ApiControl apiStores = retrofit.create(ApiControl.class);
Call<ResponseBody> call = apiStores.getIpInfo("220.160.193.209");
//在主线程里，异步调用。
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Response<ResponseBody> response) {
try {
Log.i("onResponse", "response=" + response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}

@Override
public void onFailure(Throwable t) {
Log.i("onFailure", "onFailure=" + t.getMessage());
}
});

try {
Response<ResponseBody> response = call.execute();
} catch (IOException e) {
e.printStackTrace();
}

进阶使用1：ConverterFactory转换工厂

Retrofit支持以下转换

添加依赖

定义java bean

public class IpInfo {

private int code;

private DataBean data;

public int getCode() {
return code;
}

public void setCode(int code) {
this.code = code;
}

public DataBean getData() {
return data;
}

public void setData(DataBean data) {
this.data = data;
}

public static class DataBean {
private String country;
private String country_id;
private String area;
private String area_id;
private String region;
private String region_id;
private String city;
private String city_id;
private String county;
private String county_id;
private String isp;
private String isp_id;
private String ip;

public String getCountry() {
return country;
}

public void setCountry(String country) {
this.country = country;
}

public String getCountry_id() {
return country_id;
}

public void setCountry_id(String country_id) {
this.country_id = country_id;
}

public String getArea() {
return area;
}

public void setArea(String area) {
this.area = area;
}

public String getArea_id() {
return area_id;
}

public void setArea_id(String area_id) {
this.area_id = area_id;
}

public String getRegion() {
return region;
}

public void setRegion(String region) {
this.region = region;
}

public String getRegion_id() {
return region_id;
}

public void setRegion_id(String region_id) {
this.region_id = region_id;
}

public String getCity() {
return city;
}

public void setCity(String city) {
this.city = city;
}

public String getCity_id() {
return city_id;
}

public void setCity_id(String city_id) {
this.city_id = city_id;
}

public String getCounty() {
return county;
}

public void setCounty(String county) {
this.county = county;
}

public String getCounty_id() {
return county_id;
}

public void setCounty_id(String county_id) {
this.county_id = county_id;
}

public String getIsp() {
return isp;
}

public void setIsp(String isp) {
this.isp = isp;
}

public String getIsp_id() {
return isp_id;
}

public void setIsp_id(String isp_id) {
this.isp_id = isp_id;
}

public String getIp() {
return ip;
}

public void setIp(String ip) {
this.ip = ip;
}
}
}

接口方法声明

//GSON转换数据
@GET("http://ip.taobao.com/service/getIpInfo.php")
Call<IpInfo> getIpInfo2(@Query("ip") String ip);

调用接口

Call<IpInfo> ipInfoCall = apiStores.getIpInfo2("220.160.193.207");
ipInfoCall.enqueue(new Callback<IpInfo>() {
@Override
public void onResponse(Response<IpInfo> response) {
Log.d("onResponse",response.body().getData().getCity());
}

@Override
public void onFailure(Throwable t) {
Log.i("onFailure", "onFailure=" + t.getMessage());            }
});

进阶使用2: 常用接口范例声明

//这里url为请求地址

//多参数，用map，注解用@QueryMap
@GET("url")
Call<ResponseBody> getInfo(@QueryMap Map<String,String> params);

//post的请求参数是放在请求体中的，就是body内(详见http请求),这是以json格式传递参数的
@POST("url")
@FormUrlEncoded
Call<ResponseBody> doLogin(@Body User user);

//post表单传递，map，就是我们一般用到的
@POST("url")
@FormUrlEncoded
Call<ResponseBody> doLogin(@FieldMap Map<String,String> params);

//也是post表单传递，是以单个进行传递
@FormUrlEncoded
@POST("url")
Call<ResponseBody> doLogin(@Field("username") String name, @Field("password") String password);

//请求头更改
@FormUrlEncoded
@Headers({"Accept: application/vnd.github.v3.full+json",
"User-Agent: Retrofit-Sample-App"})
Call<ResponseBody> getUserInfo();

//动态改变请求头
@GET("/user")
Call<User> getUser(@Header("Authorization")

String authorization);