MVP+RxJava+Retrofit+Fresco+RecyclerView

最新推荐文章于 2018-11-05 08:12:40 发布

wanglinuo521

最新推荐文章于 2018-11-05 08:12:40 发布

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分类专栏：网络请求

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本文介绍了一个结合RxJava和Retrofit实现的Android应用案例，包括数据获取、展示及错误处理流程。通过Presenter模式分离业务逻辑，利用Retrofit进行网络请求，并采用RxJava处理异步操作。

首先导依赖

    compile 'io.reactivex:rxjava:1.0.14'
    compile 'io.reactivex:rxandroid:1.0.1'


    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.retrofit2:converter-gson:2.0.2'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.2'


    compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'


    compile 'com.facebook.fresco:fresco:1.3.0'
    // 支持webp
    compile 'com.facebook.fresco:webpsupport:1.3.0'
// gif加载使用
    compile 'com.facebook.fresco:animated-gif:1.3.0'
// WebP（静态图+动图）加载使用
    compile 'com.facebook.fresco:animated-webp:1.3.0'

view包里

IMainView类

public interface IMainView {
    //展示数据
    void showGoods(List<GoodsBean.DataBean> list);
    //错误的时候提示
    void showError(String error);
}

MainActivity类

public class MainActivity extends AppCompatActivity implements IMainView{
    private static final String TAG = "MainActivity======";
    private RecyclerView recycler;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Fresco.initialize(this);
        setContentView(R.layout.activity_main);
        recycler = findViewById(R.id.recycle);
        //调用P层
        GoodsPresenter goodsPresenter = new GoodsPresenter();
        goodsPresenter.showGoodsToView(new GoodModel(goodsPresenter),this);
    }

    @Override
    public void showGoods(List<GoodsBean.DataBean> list) {
        MyAdapter myAdapter=new MyAdapter(MainActivity.this,list);
        recycler.setAdapter(myAdapter);
        recycler.setLayoutManager(new GridLayoutManager(MainActivity.this,2));

    }

    @Override
    public void showError(String error) {
        Log.d(TAG, "---错误---"+error);
    }
}

MyAdapter类这里就不举例子了

Model包

IModel接口

public interface IModel {
    //获取数据
    void getGoodsFromNet(Map<String,Integer> map);
}

IModel的实现类ModelImpl类

public class GoodModel implements IModel {
    private IPresenter iPresenter;

    public GoodModel(IPresenter iPresenter) {
        this.iPresenter = iPresenter;
    }

    @Override
    public void getGoodsFromNet(Map<String,Integer> map) {

       //网络请求
        RetrofitUtil retrofitUtil = RetrofitUtil.getInstance();
        MyServcie servcie = retrofitUtil.createRequest(MyServcie.class);
        Observable<GoodsBean> observable = servcie.getGoods(map);
        //执行
        observable.subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<GoodsBean>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onNext(GoodsBean goodsBean) {
                        String code = goodsBean.getCode();
                        if (code.equals("0")){
                            iPresenter.getCanshu(goodsBean.getData());
                        }
                    }
                });

    }
}

Retrofit的接口服务类

public interface MyServcie {
    @GET("product/getProducts")
    Observable<GoodsBean> getGoods(@QueryMap Map<String,Integer> map);
}

Presenter包

IPresenter接口类

public interface IPresenter {
    //把数据给view展示
    void showGoodsToView(IModel iModel, IMainView iMainView);
    //接收从M层传上来的数据
    void getCanshu(List<GoodsBean.DataBean> list);
    //接收异常
    void getError(String error);
}

PresenterImpl接口实现类

public class GoodsPresenter implements IPresenter {
    private IMainView iMainView;

    @Override
    public void showGoodsToView(IModel iModel, IMainView iMainView) {
        this.iMainView=iMainView;
        //model请求数据
        Map<String,Integer> map=new HashMap<>();
        map.put("pscid",1);
        iModel.getGoodsFromNet(map);
    }

    @Override
    public void getCanshu(List<GoodsBean.DataBean> list) {
            iMainView.showGoods(list);
    }

    @Override
    public void getError(String error) {
        iMainView.showError(error);
    }

http包

HttpUtil类

public class RetrofitUtil {
    //单例模式
    private static RetrofitUtil retrofitUtil;
    private final Retrofit retrofit;

    public static RetrofitUtil getInstance(){
        if (retrofitUtil==null){
            retrofitUtil=new RetrofitUtil();
        }
        return retrofitUtil;
    }
    //初始化Retrofit
    public RetrofitUtil(){
        retrofit = new Retrofit.Builder()
                .baseUrl(HttpConfig.base_url)
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create(new Gson()))
                .build();
    }
    //指定服务
    public <T> T createRequest(Class<T> clz){
        T t = retrofit.create(clz);
        return t;
    }
}

httpconfig类

public class HttpConfig {
   // https://www.zhaoapi.cn/product/getProducts?pscid=1
    public static String base_url="https://www.zhaoapi.cn/";
}