Android Retrofit2 网路编程

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：https://pan.baidu.com/s/1Fpp4AyzRapV9FLST5fbJKg

巴特西

Android Retrofit2 网路编程

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