前提：
添加联网权限
<uses-permission android:name="android.permission.INTERNET" />
添加依赖，同时添加GSON数据解析器
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
implementation 'com.squareup.retrofit2:retrofit:2.7.1'
GET请求：
例：请求如下接口：
（1）地址：http://49.232.114.172:8080/yunying/qufumanage/getList.json
（2）请求方式：get
（3）请求参数：无
（4）返回结果：
{
"code":200,
"msg":"success",
"list":["赵钱孙李","周吴郑王","冯陈褚卫","蒋沈韩杨","朱秦尤许","何吕施张"]
}
第一步：构建Retrofit
Retrofit retrofit = new Retrofit.Builder().baseUrl("http://49.232.114.172:8080/")
.addConverterFactory(GsonConverterFactory.create())
.build();
第二步：接口定义，Call回调里放数据对应的Bean
public interface APIRetrofit {
@GET ("/yunying/qufumanage/getList.json")
Call<GetBean> getBeanCall();
}
public class GetBean {
private int code;
private Stringmsg;
private Listlist;
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public List getList() {
return list;
}
public void setList(List list) {
this.list = list;
}
}
第三步：利用retrofit创建APIRetrofit代理对象
APIRetrofit call = retrofit.create(APIRetrofit.class);
第四步：调用接口
Call<GetBean> beanCall = call.getBeanCall();
beanCall.enqueue(new Callback<GetBean>() {
@Override
public void onResponse(Call<GetBean> call, Response<GetBean> response) {
//在获取之前我们可以先判断一下状态
// if(response.code()== HttpURLConnection.HTTP_OK)
GetBean body = response.body();
Log.d("TAG",body.getMsg());
Log.d("TAG",body.getCode()+"");
}
@Override
public void onFailure(Call<GetBean> call, Throwable t) {
}
});
POST请求：
例：请求如下接口：
(1) 地址：http://49.232.114.172:8080/yunying/qufumanage/login.php
(2)请求方式：post
(3)请求参数：”username”: “root” “password”:”root123456” （FormUrlEncoded表单形式）
(4)返回结果：
{
"code":200,
"message":"success",
}
第一步：构建Retrofit
Retrofit retrofit = new Retrofit.Builder().baseUrl("http://49.232.114.172:8080/")
.addConverterFactory(GsonConverterFactory.create())
.build();
第二步：接口定义，Call回调里放数据对应的Bean
public interface APIRetrofit {
@FormUrlEncoded
@POST ("/yunying/qufumanage/login.php")
Call<LoginBean> getLogin(@Field("username") String username,@Field("password") String password);
}
public class LoginBean {
private int code;
private Stringmessage;
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
第三步：利用retrofit创建APIRetrofit代理对象
APIRetrofit call = retrofit.create(APIRetrofit.class);
第四步：调用接口
call .enqueue(new Callback() {
@Override
public void onResponse(Call call, Response response) {
//在获取之前我们可以先判断一下状态
//if(response.code()== HttpURLConnection.HTTP_OK)
LoginBean body = response.body();
Log.d("TAG",body.getMessage());
Log.d("TAG",body.getCode()+"");
}
@Override
public void onFailure(Call call, Throwable t) {
}
});
问题：
Error: Invoke-customs are only supported starting with Android O (--min-api 26)
Stack trace:
com.android.tools.r8.a: Invoke-customs are only supported starting with Android O (--min-api 26)
at com.android.tools.r8.dex.r.a(:289)
at com.android.tools.r8.dex.r.a(:98)
at com.android.tools.r8.dex.r.b(:188)
at com.android.tools.r8.dex.b.a(:63)
at com.google.commoncute(LoadExecutionStateStep.java:40)
仅从Android O开始支持调用自定义
在APP gradle 的android 里配置
compileOptions{
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
//TODO 加个todo 有时间继续完善
看完给个赞吧~
笔芯~~~
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