开源项目RxJoke学习

一.概述

最近对RxJava学习比较感兴趣，陆续看了一些不错的文章，也发现了几个不错的开源项目，为了能够掌握在实际项目中RxJava的具体使用，特此来学习一下接触到的几个开源项目，今天就来介绍一个：RxJoke，这个开源项目使用了RxJava+Retrofit以及MVP模式，所以还是有值得学习的地方。

应用图标

项目效果图

二.分析

首先是mvpview,封装了view中的一些共性操作

View

public interface MvpView {

    void showLoading(String msg);

    void hideLoading();

    void showError(String msg, View.OnClickListener onClickListener);

    void showEmpty(String msg, View.OnClickListener onClickListener);

    void showEmpty(String msg, View.OnClickListener onClickListener, int imageId);

    void showNetError(View.OnClickListener onClickListener);

}

然后是jokeView，有特有的操作

public interface JokeView extends MvpView {
    //下拉刷新
    void refresh(List<ContentlistEntity> data);
    //上拉加载更多
    void loadMore(List<ContentlistEntity>  data);
}

BaseActivity继承mvpview

public class BaseActivity extends AppCompatActivity implements MvpView {

    @Override
    public void showLoading(String msg) {

    }

    @Override
    public void hideLoading() {

    }

    @Override
    public void showError(String msg, View.OnClickListener onClickListener) {

    }

    @Override
    public void showEmpty(String msg, View.OnClickListener onClickListener) {

    }

    @Override
    public void showEmpty(String msg, View.OnClickListener onClickListener, int imageId) {

    }

    @Override
    public void showNetError(View.OnClickListener onClickListener) {

    }
}

MainActivity

public class MainActivity extends BaseActivity implements JokeView,//作为view层必须要继承自定义的view SwipeRefreshLayout.OnRefreshListener, loadMoreListener {

    @Bind(R.id.record_recycleview)
    AutoLoadRecylerView recordRecycleview;
    @Bind(R.id.common_error_txt)
    TextView commonErrorTxt;
    @Bind(R.id.retry_btn)
    Button retryBtn;
    @Bind(R.id.common_error)
    RelativeLayout commonError;
    @Bind(R.id.joke_refresh_layout)
    SwipeRefreshLayout jokeRefreshLayout;
    private JokePresenter jokePresenter;
    private LinearLayoutManager layoutManager;
    private int page = 1;
    private List<ContentlistEntity> jokeList;
    private JokeAdapter jokeAdapter;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        initView();
        initData();
        loadData();


    }

    private void initView() {
        jokeRefreshLayout.setOnRefreshListener(this);
        layoutManager = new LinearLayoutManager(this);
        recordRecycleview.setLayoutManager(layoutManager);
        recordRecycleview.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration
                .VERTICAL_LIST));
        recordRecycleview.setLoadMoreListener(this);
    }

    private void initData() {
        jokeList = new ArrayList<>();
        jokeAdapter = new JokeAdapter(jokeList);
        recordRecycleview.setAdapter(jokeAdapter);

        jokePresenter = new JokePresenter();//view层持有presenter层的对象
        jokePresenter.attachView(this);//将view和presenter关联
    }

    private void loadData() {
        jokePresenter.loadList(page);//view层通知presenter层去加载数据
        page++;
    }
    //下拉刷新
    @Override
    public void onRefresh() {
        page = 1;
        loadData();
    }

    //上拉加载
    @Override
    public void onLoadMore() {
        loadData();
    }

    /** * @param data 回调 以下三个方法是presenter回调的函数 用于更新界面 */
    @Override
    public void refresh(List<ContentlistEntity> data) {
        commonError.setVisibility(View.GONE);
        jokeList.clear();
        jokeList.addAll(data);
        jokeAdapter.notifyDataSetChanged();
        jokeRefreshLayout.setRefreshing(false);
    }

    @Override
    public void loadMore(List<ContentlistEntity> data) {
        commonError.setVisibility(View.GONE);
        jokeList.addAll(data);
        jokeAdapter.notifyDataSetChanged();
        recordRecycleview.setLoading(false);
    }

    @Override
    public void showError(String msg, View.OnClickListener onClickListener) {
        super.showError(msg, onClickListener);
        commonError.setVisibility(View.VISIBLE);
        recordRecycleview.setLoading(false);
        jokeRefreshLayout.setRefreshing(false);
    }

    @OnClick(R.id.retry_btn)
    void setRetryBtnonClick() {
        onRefresh();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        jokePresenter.detachView();
    }
}

Model

Modle主要用来获取数据

jokeapi

public interface JokeApi {

    @Headers("apikey:83ec99fff780989a5376a1bc595ed5ff")
    @GET("showapi_joke/joke_text")
    Observable<JokeEntity> getJoke(@Query("page") int page);

    @GET("showapi_joke/joke_text")
    Call<JokeEntity> callJoke(@Header("apikey") String apikey, @Query("page") int page);
}

rxservice

public class RxService {
    private static final String BASETESTURL = "http://apis.baidu.com/showapi_open_bus/";
    private static OkHttpClient okHttpClient = new OkHttpClient.Builder().addInterceptor
            (new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY)).build();
    private static Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(BASETESTURL)
            .client(okHttpClient)
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .addConverterFactory(GsonConverterFactory.create())
            .build();

    private RxService() {
        //construct

    }

    public static <T> T createApi(Class<T> clazz) {

        return retrofit.create(clazz);
    }

}

presenter

public interface Presenter<V extends MvpView> {
    //添加view
    void attachView(V mvpView);
    //移除view
    void detachView();
}

public class BasePresenter<T extends MvpView> implements Presenter<T> {

    private T mMvpView;
    //关联view层对象
    @Override
    public void attachView(T mvpView) {
        mMvpView = mvpView;
    }

    @Override
    public void detachView() {
        mMvpView = null;
    }

    public boolean isViewAttached() {
        return mMvpView != null;
    }
    //获取view层对象
    public T getMvpView() {
        return mMvpView;
    }

    public void checkViewAttached() {
        if (!isViewAttached()) throw new MvpViewNotAttachedException();
    }

    public static class MvpViewNotAttachedException extends RuntimeException {
        public MvpViewNotAttachedException() {
            super("Please call Presenter.attachView(MvpView) before" +
                    " requesting data to the Presenter");
        }
    }
}

public class JokePresenter extends BasePresenter<JokeView> {
    //presenter层需要view层和model层的对象
    @Override
    public void attachView(JokeView mvpView) {
        super.attachView(mvpView);
    }

    @Override
    public void detachView() {
        super.detachView();
    }

    public void loadList(final int page) {
        RxService.createApi(JokeApi.class)//获取model层引用
                .getJoke(page)//调用modle层获取数据
                .subscribeOn(Schedulers.io())
                .map(new Func1<JokeEntity, List<ContentlistEntity>>() {
                    @Override
                    public List<ContentlistEntity> call(JokeEntity jokeEntity) {
                        return jokeEntity.getShowapi_res_body().getContentlist();
                    }
                })
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<List<ContentlistEntity>>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {
                        Logger.e(e.getMessage());
                        getMvpView().showError(null, null);
                    }

                    @Override
                    public void onNext(List<ContentlistEntity> contentlistEntities) {
                        if (page == 1) {
                            getMvpView().refresh(contentlistEntities);//presenter通知view中的方法
                        } else {
                            getMvpView().loadMore(contentlistEntities);
                        }
                    }
                });
    }
}

比较重要的就是这些地方了，其他地方请参考代码