基于谷歌todo-mvp写的例子

基于google todo-mvp写的例子

例子需求很简单，就是请求网络数据，然后以列表的形式显示在页面中，效果如下图：

1.基类

BasePresenter.java

public interface BasePresenter {
    void subscribe();
    void unsubscribe();
}

BaseView.java

public interface BaseView<T> {
    void setPresenter(T presenter);
}

2.数据

1.数据模型类TopListOfAll，直接采用GsonFormat生成（getter、setter去掉了）

public class TopListOfAll {
    private int totalCount;
    private int pageCount;
    private List<TopListsBean> topLists;

    public static class TopListsBean {
        private int id;
        private String topListNameCn;
        private String topListNameEn;
        private int type;
        private String summary;
    }
}

2.TopListDataSource.java，对数据操作的接口，这里只是一个简单的例子，所以就只有请求数据一个操作

public interface TopListDataSource {
    Observable<TopListOfAll> getTopList(int pageIndex);
}

具体实现类：

public class TopListRemoteDataSource implements TopListDataSource {
    private static TopListRemoteDataSource INSTANCE;
    public static TopListRemoteDataSource getInstance() {
        if (INSTANCE == null) {
            INSTANCE = new TopListRemoteDataSource();
        }
        return INSTANCE;
    }

    // Prevent direct instantiation.
    private TopListRemoteDataSource() {
    }
    @Override
    public Observable<TopListOfAll> getTopList(int pageIndex) {
        return ApiManage.getInstence().getApiService().getTopListOfAll(pageIndex);
    }
}

3.Activity、Contract、Fragment

接下来就是重要部分了，主要是ShowContract（契约类）、ShowActivity、ShowFragment、ShowPresenter

1.ShowContract.java,将View的动作和Presenter的动作写在一起一目了然

public interface ShowContract {

    interface View extends BaseView<Presenter>{

        void setLoadingProgress(boolean isShowProgressBar);

        void showTopList(TopListOfAll topList);

        void showLoadingTopListError(String msg);
    }

    interface Presenter extends BasePresenter{

        void addTopList();
    }
}

2.ShowActivity.java，主要负责创建一个fragment和presenter，所有内容均在fragment中实现，activity相当于一个管理者

public class ShowActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show);

        ShowFragment showFragment = (ShowFragment) getSupportFragmentManager()
                .findFragmentById(R.id.contentFrame);

        if (showFragment == null){
            showFragment = ShowFragment.newInstance("");

            ActivityUtils.addFragmentToActivity(getSupportFragmentManager(),
                    showFragment,R.id.contentFrame);
        }

        // Create the presenter
        new ShowPresenter(TopListRemoteDataSource.getInstance(),showFragment);
    }

}

ShowFragment.java

public class ShowFragment extends Fragment implements ShowContract.View{

    private ShowContract.Presenter mPresenter;

    private TopListAdapter mTopListAdapter;

    private ProgressBar mProgressBar;

    private TextView loadFailedView;
    private TextView noDataView;



    public static ShowFragment newInstance(@Nullable String args){
        Bundle arguments = new Bundle();
        arguments.putString("args",args);
        ShowFragment showFragment = new ShowFragment();
        showFragment.setArguments(arguments);
        return showFragment;
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mTopListAdapter = new TopListAdapter(getActivity(),null);
    }

    @Override
    public void onResume() {
        super.onResume();
        mPresenter.subscribe();
    }

    @Override
    public void onPause() {
        super.onPause();
        mPresenter.unsubscribe();
    }

    @Override
    public void setPresenter(ShowContract.Presenter presenter) {
        mPresenter = presenter;
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View root = inflater.inflate(R.layout.fragment_show, container, false);

        RecyclerView recyclerView = (RecyclerView) root.findViewById(R.id.rv_toplist);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(
                new LinearLayoutManager(getActivity(),LinearLayoutManager.VERTICAL,false));
        recyclerView.setAdapter(mTopListAdapter);
        recyclerView.addItemDecoration(
                new DividerItemDecoration(getActivity(),DividerItemDecoration.VERTICAL_LIST));

        mProgressBar = (ProgressBar) root.findViewById(R.id.progressBar);
        loadFailedView = (TextView) root.findViewById(R.id.load_failed);
        noDataView = (TextView) root.findViewById(R.id.load_no_data);

        return root;
    }

    @Override
    public void setLoadingProgress(boolean isShowProgressBar) {
        if (isShowProgressBar){
            mProgressBar.setVisibility(View.VISIBLE);
        }else {
            mProgressBar.setVisibility(View.GONE);
        }
    }

    @Override
    public void showTopList(TopListOfAll topList) {
        if (topList.getTopLists() != null && topList.getTopLists().size() > 0){

            loadFailedView.setVisibility(View.GONE);
            noDataView.setVisibility(View.GONE);

            mTopListAdapter.replaceData(topList.getTopLists());
        }else {
            noDataView.setVisibility(View.VISIBLE);
        }
    }

    @Override
    public void showLoadingTopListError(String msg) {
        loadFailedView.setVisibility(View.VISIBLE);
        noDataView.setVisibility(View.GONE);
        mProgressBar.setVisibility(View.GONE);
    }
}

ShowPresenter.java

public class ShowPresenter implements ShowContract.Presenter {

    private TopListRemoteDataSource mTopListRemoteDataSource;

    private ShowContract.View mShowView;

    private final CompositeSubscription mSubscriptions;

    public ShowPresenter(TopListRemoteDataSource topListRemoteDataSource,ShowContract.View showView) {
        this.mTopListRemoteDataSource = topListRemoteDataSource;
        this.mShowView = showView;

        mSubscriptions = new CompositeSubscription();
        mShowView.setPresenter(this);
    }

    @Override
    public void subscribe() {
        addTopList();
    }

    @Override
    public void unsubscribe() {
        mSubscriptions.clear();
    }

    @Override
    public void addTopList() {
        mShowView.setLoadingProgress(true);
        mSubscriptions.add(mTopListRemoteDataSource
                .getTopList(1)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<TopListOfAll>() {
                    @Override
                    public void onCompleted() {
                        mShowView.setLoadingProgress(false);
                    }

                    @Override
                    public void onError(Throwable e) {
                        mShowView.showLoadingTopListError(e.getMessage());
                    }

                    @Override
                    public void onNext(TopListOfAll topListOfAll) {
                        mShowView.showTopList(topListOfAll);
                    }
                })
        );
    }
}

本人是刚入门的菜鸟，以上是学习的笔记，若有错误或不足之处，欢迎指正~~
本文全部代码可以点这里:http://download.csdn.net/detail/u011797571/9714406

可以直接下载google官方Demo学习：https://github.com/googlesamples/android-architecture