Retrofit + RxJava 的结合使用

Retrofit + RxJava火了好一阵子了，网上也有很多博客，下面对之前的学习经验做一些总结，权当记笔记了，若是能够帮到看到的人，那也是很高兴的。
对于Retrofit不熟悉，可以查看 Retrofit官网，也可以查看我写的 Retrofit学习笔记。
对于RxJava不熟悉，可以查看 扔物线 大神的 给 Android 开发者的 RxJava 详解
闲话少说，直接奔主题：

1、在builde.gradle(Moudle:app)中添加如下依赖

compile 'io.reactivex:rxjava:1.1.0'compile 'io.reactivex:rxandroid:1.1.0'compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'

2、在AndroidManifest.xml中添加网络权限

<uses-permission android:name="android.permission.INTERNET"/>

3、 Retrofit 与 RxJava 的结合

3.1、单独使用Retrofit是这样的：

Retrofit.Builder builder = new Retrofit.Builder();HttpApi httpApi = builder.baseUrl(HttpUtils.BaseURL)                          .addConverterFactory(GsonConverterFactory.create())                          .build()                          .create(HttpApi.class);Map<String, String> keyMap = null;keyMap = new HashMap<>();keyMap.put("offset","10");keyMap.put("limit","0");keyMap.put("isShowTimeOutMission","false");httpApi.getData(keyMap).enqueue(new Callback<Response>() {        @Override        public void onResponse(Call<Response> call, retrofit2.Response<Response> response) {}        @Override        public void onFailure(Call<Response> call, Throwable t) {}});

上述代码中HttpApi.class的代码如下，注意这里getData()返回的数据类型为Call：

/** * Created by bai-qiang.yang on 2017/3/6. */public interface HttpApi {    @FormUrlEncoded    @POST("/install-mission/update-task")    public abstract Call<Response> getData(@FieldMap Map<String,String> keyMap);}

3.2、Retrofit 与 RxJava 结合使用是这样的：

3.2.1、添加如下依赖（这里之前我已经添加过了）：

compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'

3.2.2、代码如下（注意添加了创建builder对象时addCallAdapterFactory(RxJavaCallAdapterFactory.create())方法）：

Retrofit.Builder builder = new Retrofit.Builder();        HttpApi httpApi = builder.baseUrl(HttpUtils.BaseURL)                .addConverterFactory(GsonConverterFactory.create())                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                .build()                .create(HttpApi.class);        Map<String, String> keyMap = null;        keyMap = new HashMap<>();        keyMap.put("offset","10");        keyMap.put("limit","0");        keyMap.put("isShowTimeOutMission","false");        Observable<Response> observable = httpApi.getData(keyMap);        observable.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribe(new Subscriber<Response>() {                    @Override                    public void onCompleted() {                        System.out.println("onCompleted------>");                    }                    @Override                    public void onError(Throwable e) {                        System.out.println("error---->"+e.getMessage());                    }                    @Override                    public void onNext(Response response) {                        /**在这里改变UI*/                        System.out.println("msg---->"+response.getMsg());                    }                });

上述代码中HttpApi.class的代码如下，注意这里getData()返回的数据类型为Observable：

/** * Created by bai-qiang.yang on 2017/3/6. */public interface HttpApi {    @FormUrlEncoded    @POST("/install-mission/update-task")    public abstract Observable<Response> getData(@FieldMap Map<String,String> map);}

这样Retrofit和RxJava就结合在一起了，下面是我写的一个简单的封装：

/** * Created by bai-qiang.yang on 2017/3/6. */public class HttpManager {    private Retrofit mRetrofit;    private HttpApi mHttpApi;    public static String BaseURL = "http://app.reward.test.utouu.com";    //搞成单例    public HttpManager() {}    public static final HttpManager httpManager = new HttpManager();    public static HttpManager getInstance() {        return  httpManager;    }    public <T> T initRetrofit(Class<T> T) {        if (mRetrofit == null) {            mRetrofit = new Retrofit.Builder()                    .baseUrl(BaseURL)                    .addConverterFactory(GsonConverterFactory.create())                    .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                    .build();        }        T t = mRetrofit.create(T);        return t;    }    public <T> void toSubscribe(Observable o,Subscriber<T> s){                o.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribe(s);    }}

上述代码中HttpApi.class的代码如下：

/** * Created by bai-qiang.yang on 2017/3/6. */public interface HttpApi {    @FormUrlEncoded    @POST("/install-mission/update-task")    public abstract Observable<Response> getData(@FieldMap Map<String,String> keyMap);}

使用如下：

        Map<String, String> keyMap = null;        keyMap = new HashMap<>();        keyMap.put("offset","10");        keyMap.put("limit","0");        keyMap.put("isShowTimeOutMission","false");        if (mInstance == null) {            mInstance = HttpManager.getInstance();        }        if (mObservable == null) {            mObservable = mInstance                    .initRetrofit(HttpApi.class)                    .getData(keyMap);        }        mInstance.toSubscribe(mObservable, new Subscriber<Response>() {            @Override            public void onCompleted() {                System.out.println("complete---->");            }            @Override            public void onError(Throwable e) {                System.out.println("error---->"+e.getMessage());            }            @Override            public void onNext(Response response) {                /**在这里更新UI*/                System.out.println("msg---->"+response.getMsg());            }        });