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

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以上是 Android Retrofit2网路编程实现方法详解 的全部内容, 来源链接: utcz.com/p/243160.html

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