Android 单例模式 封装 Okhttp + RxJava 网络请求(get和post)

用过Retrofit的小伙伴都知道,当Retrofit和RxJava结合使用的时候,我们需要在定义Api的接口中的请求方法的返回值设置成一个带有解析实体类泛型的Observable

下面Rxjava和Okhttp结合使用

导入依赖:

    compile 'io.reactivex.rxjava2:rxjava:2.0.1'    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'    compile 'com.squareup.okhttp3:okhttp:3.4.1'

下面是网络工具类,关键位置有注释

public class NetTool {    private static OkHttpClient okHttpClient;    private static NetTool instance;    private NetTool() {        okHttpClient = new OkHttpClient();    }    //单例双重锁线程安全    public static NetTool getInstance() {        if (instance == null) {            synchronized (NetTool.class) {                if (instance == null) {                    instance = new NetTool();                }            }        }        return instance;    }    //get请求 声明泛型 括号里传入网址和实体类    public <T> Observable<T> request(final String url, final Class<T> clazz) {        return  Observable.create(new ObservableOnSubscribe<String>() {            @Override            public void subscribe(ObservableEmitter<String> e) throws Exception {                e.onNext(url);            }        }).map(new Function<String, String>() {            @Override            public String apply(String s) throws Exception {                //参数里的s是onNext方法传递过来的url                Request request = new Request.Builder().url(s).build();                Response respose = okHttpClient.newCall(request).execute();                //然后请求成功后响应的String数据继续对其map转换                //在下个map转换中进行Json解析                return respose.body().string();            }        }).map(new Function<String, T>() {            @Override            public T apply(String s) throws Exception {                Gson gson = new Gson();                T t = gson.fromJson(s,clazz);                return t;            }        });    }    //post 提交键值对    public  <T> Observable<T> postKeyValue (final String baseurl, final Map<String,String> map, final Class<T> clazz) {        return Observable.create(new ObservableOnSubscribe<String>() {            @Override            public void subscribe(ObservableEmitter<String> e) throws Exception {                e.onNext(baseurl);            }        }).map(new Function<String, String>() {            @Override            public String apply(String s) throws Exception {                //参数里的s是onNext方法传递过来的baseurl                FormBody.Builder builder = new FormBody.Builder();                //遍历map 添加多个参数进入请求体                Set<String> keyset = map.keySet();                Iterator<String> keyIterator = keyset.iterator();                while (keyIterator.hasNext()){                    String key = keyIterator.next();                    builder.add(key,map.get(key));                }                //生成请求体                RequestBody  requestBody= builder.build();                Request request = new Request.Builder().url(s).post(requestBody).build();                Response response = okHttpClient.newCall(request).execute();                return response.body().string();            }        }).map(new Function<String, T>() {            @Override            public T apply(String s) throws Exception {                Gson gson = new Gson();                T t = gson.fromJson(s,clazz);                return t;            }        });    }    //post携带json数据请求    public  <T> Observable<T> postJsonstr (final String baseUrl , final Class<T> clazz, final String json){        return Observable.create(new ObservableOnSubscribe<String>() {            @Override            public void subscribe(ObservableEmitter<String> e) throws Exception {                e.onNext(baseUrl);            }        }).map(new Function<String, String>() {            @Override            public String apply(String s) throws Exception {                MediaType JSON = MediaType.parse("application/json; charset=utf-8");                RequestBody body = RequestBody.create(JSON, json);                Request request = new Request.Builder()                        .url(baseUrl)                        .post(body)                        .build();                Response response = okHttpClient.newCall(request).execute();                return response.body().string();            }        }).map(new Function<String, T>() {            @Override            public T apply(String s) throws Exception {                Gson gson = new Gson();                T t = gson.fromJson(s,clazz);                return t;            }        });    }}

下面是调用代码

       //get请求应用        NetTool.getInstance()                .request("http://gank.io/api/data/%E7%A6%8F%E5%88%A9/50/1", PictureBean.class)                .subscribeOn(Schedulers.io())//指定之前被观察者的动作在io线程中操作                .observeOn(AndroidSchedulers.mainThread())//将被观察者返回的数据切换到主线程中                .subscribe(new Consumer<PictureBean>() {                    @Override                    public void accept(PictureBean pictureBean) throws Exception {                        //请求成功,并在子线程完成了解析,返回了实体类                    }                }, new Consumer<Throwable>() {                    @Override                    public void accept(Throwable throwable) throws Exception {                        //异常                    }                });

     //post键值对请求        Map<String,String> postMap = new HashMap<>();        postMap.put("username","louyulin");        postMap.put("password","123456");        NetTool.getInstance()                .postKeyValue("http://...",postMap,PictureBean.ResultsBean.class)                .subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribe(new Consumer<PictureBean.ResultsBean>() {                    @Override                    public void accept(PictureBean.ResultsBean resultsBean) throws Exception {                    }                }, new Consumer<Throwable>() {                    @Override                    public void accept(Throwable throwable) throws Exception {                    }                });