Android Retrofit2网路编程实现方法详解
Android里面本身有OKHttp，不过不是很好用，这里就用Retrofit2，简单好用。
首先，需要加入网络权限：
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
在build.gradle文件里加入引用包： Gson不用的话，就不需要添加
implementation 'com.squareup.okhttp3:okhttp:3.0.1'
implementation 'com.squareup.retrofit2:retrofit:2.0.2'
implementation 'com.squareup.retrofit2:converter-gson:2.0.2'
这时准备工作做完了。
先创建一个接口文件TestService
package controller.hzl.com.testclient;
import java.util.List;
import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.HTTP;
import retrofit2.http.POST;
import retrofit2.http.Path;
public interface TestService {
@FormUrlEncoded
@POST("getmacaddress")
Call<ResponseBody> TestCall2(@Field("mobile") String mobile);
@FormUrlEncoded
@POST("getmacaddress")
Call<MacAdress> TestCall3(@Field("mobile") String mobile);
}
这里的@POST("getmacaddress") 的getmacaddress 是URL除IP外的最后一个路径，可以理解为 IP+getmacaddress
这里用的是POST请求方式，@Field("mobile")为请求接口的参数。
写一个实体类模型，用来匹配接收的数据MacAdress
package controller.hzl.com.testclient;
public class MacAdress {
private String resultMsg;
public String getResultMsg() {
return resultMsg;
}
public void setResultMsg(String resultMsg) {
this.resultMsg = resultMsg;
}
public String getResultState() {
return resultState;
}
public void setResultState(String resultState) {
this.resultState = resultState;
}
public String getResultObj() {
return resultObj;
}
public void setResultObj(String resultObj) {
this.resultObj = resultObj;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getDelta() {
return delta;
}
public void setDelta(String delta) {
this.delta = delta;
}
private String resultState;
private String resultObj;
private String message;
private String delta;
}
最后主MainActivity
package controller.hzl.com.testclient;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import okhttp3.MediaType;
import okhttp3.RequestBody;
import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class MainActivity extends Activity {
private Button button1;
private Button button2;
private Button button3;
private Button button4;
private Button button5;
private Button button6;
private Button button7;
private Button button8;
private ImageView image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
button3 = (Button) findViewById(R.id.button3);
button4 = (Button) findViewById(R.id.button4);
button5 = (Button) findViewById(R.id.button5);
button6 = (Button) findViewById(R.id.button6);
button7 = (Button) findViewById(R.id.button7);
button8 = (Button) findViewById(R.id.button8);
image = (ImageView) findViewById(R.id.image);
button1.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
GitHubServiceTest();
}
});
button2.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
IWeatherGetTest();
}
});
}
private void GitHubServiceTest() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("http://115.29.190.99/api/meta/")
.addConverterFactory(GsonConverterFactory.create())
.build();
TestService service = retrofit.create(TestService.class);
//https://api.github.com/users/octocat/repos
Call<ResponseBody> call = service.TestCall2("13296540788");
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
// Get result bean from response.body()
// List<Repo> repos = response.body();
System.out.println(response.code());
try {
System.out.println(response.body().string());
String jsonstr = new String(response.body().bytes());
System.out.println("jsonstr="+jsonstr);
}catch (Exception e){
}
// Get header item from response
String links = response.headers().get("Link");
showlog("links="+links);
/**
* 不同于retrofit1 可以同时操作序列化数据javabean和header
*/
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable throwable) {
throwable.printStackTrace();
//showlog(throwable.getCause().toString());
}
});
}
private void IWeatherGetTest() {
{
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("http://115.29.190.99/api/meta/")
.addConverterFactory(GsonConverterFactory.create())
.build();
TestService service = retrofit.create(TestService.class);
//https://api.github.com/users/octocat/repos
Call<MacAdress> call = service.TestCall3("13296540788");
call.enqueue(new Callback<MacAdress>() {
@Override
public void onResponse(Call<MacAdress> call, Response<MacAdress> response) {
// Get result bean from response.body()
// List<Repo> repos = response.body();
System.out.println(response.code());
try {
System.out.println(response.body().getResultObj());
System.out.println(response.body().getResultState());
}catch (Exception e){
}
// Get header item from response
String links = response.headers().get("Link");
showlog("links="+links);
/**
* 不同于retrofit1 可以同时操作序列化数据javabean和header
*/
}
@Override
public void onFailure(Call<MacAdress> call, Throwable throwable) {
throwable.printStackTrace();
//showlog(throwable.getCause().toString());
}
});
}
}
public static void showlog(String info) {
System.out.print("Retrofit " + info + "\n");
}
}
这里的baseUrl("http://115.29.190.99/api/meta/") 就是URL的前面路径，加上@POST("getmacaddress") 的getmacaddress 其实就是 ：http://115.29.190.99/api/meta/getmacaddress 请求的全路径。
两种方式:
TestCall2 是直接接收接收返回json的数据。
TestCall3 是用模型接收返回的json数据。
输出结构为：
代码
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持海外IDC网。
【出处：美国高防服务器 网络转载请说明出处】