Android RxJava+Retrofit异步网络加载框架

Android RxJava+Retrofit异步网络加载框架

RxJava:   一个在Java  vm上使用可观测的序列来组成异步的，基于事件的程序的库。（这是github上的翻译）   现在，这个Rxjava框架基本上取代了AsyncTask和Handler, 因为

AsyncTask和handler的异步加载会随着逻辑的加深，变得越来越复杂（指的是逻辑），而RxJava不会，RxJava是通过一种扩展的观察者模式来实现的，Observabl（被观察者）Observer（观察者） 鼠标subscribe(订阅者) 通过这三个步骤来实现的，下面我将列出代码：就可以清晰看到了。

Retrofit:    这是一个不错的网络加载库，就是对Okhttp的再次封装。Retrfit与OKhttp共同出资square公司，与OK不同的事retrfit需要定义一个接口，用来返回我们的call对象，retrfit提供的请求方式为注解方式，有get和post。参数也是注解的方式,retrfit是square公司开源的一个高质量高效率的http库，它将我们自己开发的底层代码和细节封装了起来。

该项目所需要的依赖包：

compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'io.reactivex:rxjava:1.1.6'
compile 'io.reactivex:rxandroid:1.2.1'
compile 'com.squareup.retrofit2:adapter-rxjava:2.3.0'

CaipuApi(retorfit必须提供一个接口类,泛型可为String,可为Bean)

import java.util.HashMap;

import retrofit2.http.POST;
import retrofit2.http.Query;
import retrofit2.http.QueryMap;
import rx.Observable;

public interface CaipuApi {
    @POST("/cook/query.php")
    Observable getCaiPu(@QueryMap HashMap,String> map);
}

CaiPu

import java.util.List;

public class CaiPu {

    private String resultcode;
    private String reason;
    private ResultBean result;
    private int error_code;

    public String getResultcode() {
        return resultcode;
    }

    public void setResultcode(String resultcode) {
        this.resultcode = resultcode;
    }

    public String getReason() {
        return reason;
    }

    public void setReason(String reason) {
        this.reason = reason;
    }

    public ResultBean getResult() {
        return result;
    }

    public void setResult(ResultBean result) {
        this.result = result;
    }

    public int getError_code() {
        return error_code;
    }

    public void setError_code(int error_code) {
        this.error_code = error_code;
    }

    public static class ResultBean {


        private String totalNum;
        private int pn;
        private int rn;
        private List data;

        public String getTotalNum() {
            return totalNum;
        }

        public void setTotalNum(String totalNum) {
            this.totalNum = totalNum;
        }

        public int getPn() {
            return pn;
        }

        public void setPn(int pn) {
            this.pn = pn;
        }

        public int getRn() {
            return rn;
        }

        public void setRn(int rn) {
            this.rn = rn;
        }

        public List getData() {
            return data;
        }

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

        @Override
        public String toString() {
            return "ResultBean{" +
                    "totalNum='" + totalNum + '\'' +
                    ", pn=" + pn +
                    ", rn=" + rn +
                    ", data=" + data +
                    '}';
        }

        public static class DataBean {

            private String id;
            private String title;
            private String tags;
            private String imtro;
            private String ingredients;
            private String burden;
            private List albums;
            private List steps;

            public String getId() {
                return id;
            }

            public void setId(String id) {
                this.id = id;
            }

            public String getTitle() {
                return title;
            }

            public void setTitle(String title) {
                this.title = title;
            }

            public String getTags() {
                return tags;
            }

            public void setTags(String tags) {
                this.tags = tags;
            }

            public String getImtro() {
                return imtro;
            }

            public void setImtro(String imtro) {
                this.imtro = imtro;
            }

            public String getIngredients() {
                return ingredients;
            }

            public void setIngredients(String ingredients) {
                this.ingredients = ingredients;
            }

            public String getBurden() {
                return burden;
            }

            public void setBurden(String burden) {
                this.burden = burden;
            }

            public List getAlbums() {
                return albums;
            }

            public void setAlbums(List albums) {
                this.albums = albums;
            }

            public List getSteps() {
                return steps;
            }

            public void setSteps(List steps) {
                this.steps = steps;
            }

            public static class StepsBean {
                /**
                 * img : http://juheimg.oss-cn-hangzhou.aliyuncs.com/cookbook/s/90/8963_f58b8378c3c7bc50.jpg
                 * step : 1.鸡腿去骨，肉腌制
                 */

                private String img;
                private String step;

                public String getImg() {
                    return img;
                }

                public void setImg(String img) {
                    this.img = img;
                }

                public String getStep() {
                    return step;
                }

                public void setStep(String step) {
                    this.step = step;
                }
            }
        }
    }

    @Override
    public String toString() {
        return "CaiPu{" +
                "result=" + result.toString() +
                '}';
    }
}

RxJavaRetrofitUtils（网络操作的一个工具类）

import java.util.HashMap;
import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import rx.Observable;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action1;
import rx.schedulers.Schedulers;

public class RxJavaRetorfitUtils {
    private static RxJavaRetorfitUtils utils=new RxJavaRetorfitUtils();
    CaipuApi caipuApi;
    public static RxJavaRetorfitUtils getInstens(){
        return utils;
    }
    public RxJavaRetorfitUtils(){
        OkHttpClient client=new OkHttpClient.Builder().connectTimeout(5, TimeUnit.SECONDS)
                .build();
        Retrofit retrofit=new Retrofit.Builder()
                .baseUrl("http://apis.juhe.cn/")
                .client(client)
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        caipuApi = retrofit.create(CaipuApi.class);
    }
    //提供的方法让使用者去调用
    public void getCaiPu(HashMap map, final CallBack call){
        Observable caipu=caipuApi.getCaiPu(map);
        //调度线程
        caipu.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1() {
                    @Override
                    public void call(CaiPu caiPu) {
                        //可以在里面进行操作
                        if(null==caiPu){
                            call.onError();
                        }else{
                            call.onSuccess(caiPu);
                        }
                    }
                });
    }
    //这是一个回调借口
    public interface CallBack{
        void onSuccess(CaiPu caiPu);
        void onError();
    }
}

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import java.util.HashMap;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initPostUrl();
    }
    private void initPostUrl() {
        HashMap,String> map=new HashMap<>();
        map.put("menu","土豆丝");
        map.put("key","请求的key值");
        RxJavaRetorfitUtils.getInstens().getCaiPu(map, new RxJavaRetorfitUtils.CallBack() {
            @Override
            public void onSuccess(CaiPu caiPu) {
                Toast.makeText(MainActivity.this, caiPu.toString(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onError() {
                Log.e("aaaa","打印失败");
            }
        });
    }
}