一个小框架，基于rx_retrofit2_mvp

离职在即，也没什么事情做，就鼓捣了一下。任意搭建了一个小框架，看看以后能不能搞出自己的一个model，好了。不说别的，上代码

1，先上依赖库

    compile 'io.reactivex:rxandroid:1.2.1'
    compile 'com.squareup.okhttp3:okhttp:3.3.1'
    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'io.reactivex:rxjava:1.1.0'
    compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'
    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'
    compile 'com.squareup.retrofit:adapter-rxjava:2.0.0-beta2'
    compile 'com.android.support:design:24.2.1'
    compile 'com.android.support:recyclerview-v7:24.2.1'
    compile 'com.android.support:cardview-v7:24.2.1'
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.github.bumptech.glide:glide:3.7.0'
    compile 'com.github.chrisbanes.photoview:library:1.2.3'

2。 依赖retrolambda

在app.build依赖

    apply plugin: 'me.tatarka.retrolambda'

   compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

然后在项目的app.build依赖

        classpath 'me.tatarka:gradle-retrolambda:3.2.5'

OK，到这里我们的环境搭建就完毕了

3。搭建Http请求模块

1. 搭建工具类RetrofitUtils

   package mvpmaster.lht.com.lht.utils;
   
   import com.squareup.okhttp.OkHttpClient;
   
   import java.util.concurrent.TimeUnit;
   
   import retrofit.GsonConverterFactory;
   import retrofit.Retrofit;
   import retrofit.RxJavaCallAdapterFactory;
   
   /**
    * Created by Ly on 2016/10/14.
    */
   
   public class RetrofitUtils {
       private static final int READ_TIMEOUT = 60;//读取超时时间 单位 秒
       private static final int CONN_TIMEOUT = 60;//连接超时时间 单位 秒
       private static Retrofit retrofit;
   
       public RetrofitUtils() {
       }
   
       public static Retrofit getInstance(String url) {
           retrofit = null;
           // 初始化一个okhttpClicent的对象 不然ref会自己加入一个
           OkHttpClient client = new OkHttpClient();
   //        设置读取时间为1分钟
           client.setReadTimeout(READ_TIMEOUT, TimeUnit.MINUTES);
   //        设置链接时间为12s
           client.setConnectTimeout(CONN_TIMEOUT, TimeUnit.SECONDS);
           retrofit = new Retrofit.Builder()
                   .client(client)
                   .baseUrl(url)
                   .addConverterFactory(GsonConverterFactory.create())
                   .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                   .build();
           return retrofit;
       }
   }
   

   Ps,我发现这里并不能做到session的保持，在某些公司的后台并不能支持这种请求库，我稍候会上传一个更新后的版本号

2. 这里写上我的一个interface(为什么我用了rx还要有callback？？？黑人问号脸)

   package mvpmaster.lht.com.lht.conf;
   
   /**
    * Created by Ly on 2016/10/13.
    */
   
   public interface OkHttpCallBack<T> {
       void onSuccess(T t);//成功的回调
   
       void onFaild(Throwable e);//失败的回调
   
       void onFinish();
   }
   

3. 然后是一些比較通用的api文件了，我就不写凝视了

   package mvpmaster.lht.com.lht.conf;
   
   /**
    * Created by Ly on 2016/11/2.
    */
   
   public class HttpConf {
       private static final String ZHIHU_BASE_URL = "http://news-at.zhihu.com/api/4/";
       private static final String GANK_BASE_URL = "http://gank.io/api/";
       private static final String DAILY_BASE_URL = "http://app3.qdaily.com/app3/";
   
       public static String getZhihuBaseUrl() {
           return ZHIHU_BASE_URL;
       }
   
       public static String getGankBaseUrl() {
           return GANK_BASE_URL;
       }
   
       public static String getDailyBaseUrl() {
           return DAILY_BASE_URL;
       }
   }
   

   package mvpmaster.lht.com.lht.conf;
   
   /**
    * Created by Ly on 2016/11/2.
    */
   
   public class HttpStatusConf {
       private static final int SUCCESS = 200;
   
       public static int getSUCCESS() {
           return SUCCESS;
       }
   }
   

   package mvpmaster.lht.com.lht.utils;
   
   import mvpmaster.lht.com.lht.ui.beanIml.DailyBean;
   import mvpmaster.lht.com.lht.ui.beanIml.NewsDetailBean;
   import mvpmaster.lht.com.lht.ui.beanIml.NewsTimeLine;
   import retrofit.http.GET;
   import retrofit.http.Path;
   import rx.Observable;
   
   /**
    * Created by Ly on 2016/10/14.
    */
   
   public interface APIService {
   
       @GET("news/latest")
       Observable<NewsTimeLine> getZhiHuList();
   
       @GET("news/before/{time}")
       Observable<NewsTimeLine> getBeforetNews(@Path("time") String time);
   
       @GET("news/{id}")
       Observable<NewsDetailBean> getDetailNews(@Path("id") String id);
   
       //    for daily
       @GET("homes/index/{num}.json")
       Observable<DailyBean> getDailyTimeLine(@Path("num") String num);
   
   }

4，网络请求搭建完了。重头戏来了，我们来搭建mvp的基本框架

1. 我们的baseActivity

   package mvpmaster.lht.com.lht.base;
   
   import android.content.Context;
   import android.os.Build;
   import android.os.Bundle;
   import android.support.annotation.Nullable;
   import android.support.design.widget.AppBarLayout;
   import android.support.v4.widget.SwipeRefreshLayout;
   import android.support.v7.app.ActionBar;
   import android.support.v7.app.AppCompatActivity;
   import android.support.v7.widget.Toolbar;
   import android.util.TypedValue;
   import android.view.MenuItem;
   
   import butterknife.ButterKnife;
   import mvpmaster.lht.com.lht.R;
   
   /**
    * Created by Ly on 2016/11/2.
    */
   
   public abstract class BaseActivity<V, T extends BasePresenter<V>> extends AppCompatActivity {
   
       protected T mPresenter;
       private AppBarLayout mAppBar;
       private Toolbar mToolbar;
       private SwipeRefreshLayout mRefreshLayout;
   
       public Context mContext;
       private boolean mIsRequestDataRefresh = false;
   
       @Override
       protected void onCreate(@Nullable Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           mContext = this;
           // 同意为空 不是全部的都要实现这个模式
           if (createPresenter() != null) {
               mPresenter = createPresenter();
               mPresenter.attachView((V) this);
           }
           setContentView(provideContentViewId());
           ButterKnife.bind(this);
   
           mAppBar = (AppBarLayout) findViewById(R.id.app_bar_layout);
           mToolbar = (Toolbar) findViewById(R.id.toolbar);
           if (mToolbar != null && mAppBar != null) {
               setSupportActionBar(mToolbar); //把Toolbar当做ActionBar给设置
   
               if (canBack()) {
                   ActionBar actionBar = getSupportActionBar();
                   if (null != actionBar) {
                       //设置ActionBar一个返回箭头。主界面没有，次级界面有
                       actionBar.setDisplayHomeAsUpEnabled(true);
                   }
                   if (Build.VERSION.SDK_INT >= 21) {
                       //Z轴浮动
                       mAppBar.setElevation(10.6F);
                   }
               }
           }
           if (isSetRefresh()) {
               setupSwipeRefresh();
           }
   
       }
   
       public static void toIntent(Context context, String... str) {
       }
   
       @Override
       public boolean onOptionsItemSelected(MenuItem item) {
           // 此时android.R.id.home即为返回箭头
           if (item.getItemId() == android.R.id.home) {
               onBackPressed();
               finish();
               return true;
           } else {
               return super.onOptionsItemSelected(item);
           }
       }
   
       @Override
       protected void onDestroy() {
           super.onDestroy();
           if (mPresenter != null) {
               mPresenter.detachView();
           }
       }
   
       /**
        * 生成下拉刷新
        */
       private void setupSwipeRefresh() {
           mRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh);
           if (null != mRefreshLayout) {
               mRefreshLayout.setColorSchemeResources(R.color.colorAccent, R.color.colorPrimary);
               mRefreshLayout.setProgressViewOffset(true,
                       0,
                       (int) TypedValue.applyDimension
                               (TypedValue.COMPLEX_UNIT_DIP, 24, getResources()
                                       .getDisplayMetrics()));
           }
       }
   
       /**
        * 设置刷新
        *
        * @param requestDataRefresh
        */
       public void setRefresh(boolean requestDataRefresh) {
           if (mRefreshLayout == null) {
               return;
           }
           if (!requestDataRefresh) {
               mIsRequestDataRefresh = false;
               mRefreshLayout.postDelayed(() -> {
                   if (mRefreshLayout != null) {
                       mRefreshLayout.setRefreshing(false);
                   }
               }, 1000);
           } else {
               mRefreshLayout.setRefreshing(true);
           }
       }
   
       /**
        * 数据刷新
        */
       public void requestDataRefresh() {
           mIsRequestDataRefresh = true;
       }
   
       /**
        * 推断当前 Activity 是否同意返回
        * 主界面不同意返回，次级界面同意返回
        *
        * @return false
        */
       public boolean canBack() {
           return false;
       }
   
       /**
        * 推断子Activity是否须要刷新功能
        *
        * @return false
        */
       public Boolean isSetRefresh() {
           return false;
       }
   
       /**
        * 创建P
        *
        * @return T
        */
       protected abstract T createPresenter();
   
       /**
        * 用于引入布局文件
        *
        * @return
        */
       abstract protected int provideContentViewId();
   }
   

   package mvpmaster.lht.com.lht.base;
   
   import android.content.Context;
   import android.os.Bundle;
   import android.support.v4.app.Fragment;
   import android.support.v4.widget.SwipeRefreshLayout;
   import android.util.TypedValue;
   import android.view.LayoutInflater;
   import android.view.View;
   import android.view.ViewGroup;
   
   import butterknife.ButterKnife;
   import mvpmaster.lht.com.lht.R;
   
   /**
    * Created by Ly on 2016/11/2.
    */
   
   public abstract class BaseFragment<V, T extends BasePresenter<V>> extends Fragment {
       protected Context mContext;
       protected T mPresenter;
   
       private boolean mIsRequestDataRefresh = false;
       private SwipeRefreshLayout mRefreshLayout;
   
       @Override
       public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           mContext = getActivity();
           mPresenter = createPresenter();
           mPresenter.attachView((V) this);
       }
   
       @Override
       public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
           View rootView = inflater.inflate(createViewLayoutId(), container, false);
           ButterKnife.bind(this, rootView);
           initView(rootView);
           if (isSetRefresh()) {
               setupSwipeRefresh(rootView);
           }
           return rootView;
       }
   
       @Override
       public void onDestroy() {
           super.onDestroy();
           mPresenter.detachView();
       }
   
       private void setupSwipeRefresh(View view) {
           mRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_refresh);
           if (mRefreshLayout != null) {
               mRefreshLayout.setColorSchemeResources(R.color.refresh_progress_1,
                       R.color.refresh_progress_2, R.color.refresh_progress_3);
               mRefreshLayout.setProgressViewOffset(true, 0, (int) TypedValue
                       .applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, getResources().getDisplayMetrics()));
               mRefreshLayout.setOnRefreshListener(this::requestDataRefresh);
           }
       }
   
       public void requestDataRefresh() {
           mIsRequestDataRefresh = true;
       }
   
       public void setRefresh(boolean requestDataRefresh) {
           if (mRefreshLayout == null) {
               return;
           }
           if (!requestDataRefresh) {
               mIsRequestDataRefresh = false;
               mRefreshLayout.postDelayed(() -> {
                   if (mRefreshLayout != null) {
                       mRefreshLayout.setRefreshing(false);
                   }
               }, 1000);
           } else {
               mRefreshLayout.setRefreshing(true);
           }
       }
   
       protected abstract T createPresenter();
   
       protected abstract int createViewLayoutId();
   
       protected void initView(View rootView) {
       }
   
       public Boolean isSetRefresh() {
           return true;
       }
   }
   

   还有其它的一些base，我就不一一上传了。

2. 说一下我理解的mvp。在我的看法中。mvp，m是要做一些耗时操作的，像读取网络数据，数据库数据。sp数据啊...这些脏活苦活所有都丢给它去做，我们在contract中给它定义好了interface，model类在自己本身去实现它。然后按着上层的要求去做那些苦活累活；而View呢？我认为通常是指我们的activity或者fragment巴，他们就负责一些比較轻松的东西了。像显示个toast啊，show一下dialog啊，拿一下editext的数据啊。最苦力也就是设置个适配器啊。监听一下滑动啊之类的，反正最轻松的那个就是它了；然后就是presenter了，这个类我认为挺难弄的，类似于红娘吧，它也要实现Contract的interface，并且要持有model和view的引用。在interface的回调里面去操控model类去做耗时操作，然后在对应的callback（怎么又是callback？）去操控view去实现各种交互。（不要喷我说得那么模糊，可是这样的东西写不出来，用了就会有这样的想法，并且。用了一次mvp，你就不会再想去用mvc了）
3. 我们举一个样例，首页那里拿取了知乎的信息，用了一个recyclerview去显示拿到的数据。我们就用它来讲，我先上传一波项目文件夹，不然太懵逼了。
4. 我们先看我们的fragment 

   package mvpmaster.lht.com.lht.ui.fragment.zhuhu;
   
   import android.os.Bundle;
   import android.support.v7.widget.LinearLayoutManager;
   import android.support.v7.widget.RecyclerView;
   import android.view.View;
   import android.widget.Toast;
   
   import butterknife.Bind;
   import mvpmaster.lht.com.lht.R;
   import mvpmaster.lht.com.lht.base.BaseFragment;
   import mvpmaster.lht.com.lht.ui.adapter.ZhiHuAdapter;
   import mvpmaster.lht.com.lht.ui.beanIml.NewsTimeLine;
   
   /**
    * Created by Ly on 2016/11/2.
    */
   
   public class ZhiHuFragment extends BaseFragment<ZhiHuContract.ZhiHuView, ZhiHuPresenter> implements ZhiHuContract.ZhiHuView {
       @Bind(R.id.content_list)
       RecyclerView mRlvZhiHu;
   
       private LinearLayoutManager mLayoutManager;
       private ZhiHuAdapter zhiHuAdapter;
   
       // 最后一个可见的视图
       private int lastVisibleItem;
       // 是否载入过很多其它
       private boolean isLoadMore = false;
       // 知乎日报须要的下一个參数
       private String time;
   
       /**
        * 初始化配置
        */
       private void initConf() {
   //        适配器
           zhiHuAdapter = new ZhiHuAdapter(getActivity());
   //        manager
           mLayoutManager = new LinearLayoutManager(getActivity());
           mRlvZhiHu.setLayoutManager(mLayoutManager);
           mRlvZhiHu.setAdapter(zhiHuAdapter);
   //        启动自己主动刷新配置
           setDataRefresh(true);
   //        获取第一次的数据
           mPresenter.getDataList();
   //        检測recView的滑动状态
           scrollRecycleView();
       }
   
       /**
        * recyclerView Scroll listener , maybe in here is wrong ?
        */
       public void scrollRecycleView() {
           mRlvZhiHu.addOnScrollListener(new RecyclerView.OnScrollListener() {
               @Override
               public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                   super.onScrollStateChanged(recyclerView, newState);
                   if (newState == RecyclerView.SCROLL_STATE_IDLE) {
                       lastVisibleItem = mLayoutManager
                               .findLastVisibleItemPosition();
                       if (mLayoutManager.getItemCount() == 1) {
                           zhiHuAdapter.updateLoadStatus(zhiHuAdapter.getLOAD_MORE());
                           return;
                       }
                       if (lastVisibleItem + 1 == mLayoutManager
                               .getItemCount()) {
                           zhiHuAdapter.updateLoadStatus(zhiHuAdapter.getLOAD_PULL_TO());
                           isLoadMore = true;
                           zhiHuAdapter.updateLoadStatus(zhiHuAdapter.getLOAD_MORE());
                           mPresenter.getBeforeDateList(time);
                       }
                   }
               }
   
               @Override
               public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                   super.onScrolled(recyclerView, dx, dy);
                   lastVisibleItem = mLayoutManager.findLastVisibleItemPosition();
               }
           });
       }
   
       @Override
       public void requestDataRefresh() {
           super.requestDataRefresh();
           setDataRefresh(true);
           mPresenter.getDataList();
       }
   
       @Override
       protected ZhiHuPresenter createPresenter() {
           return new ZhiHuPresenter(this);
       }
   
       @Override
       protected int createViewLayoutId() {
           return R.layout.fragment_zhihu;
       }
   
       @Override
       public void setDataRefresh(boolean refresh) {
           setRefresh(refresh);
       }
   
       public static ZhiHuFragment newInstance() {
           Bundle args = new Bundle();
           ZhiHuFragment fragment = new ZhiHuFragment();
           fragment.setArguments(args);
           return fragment;
       }
   
       @Override
       public void loadFinishAndReset(NewsTimeLine newsTimeLine, String time) {
           zhiHuAdapter.resetData(newsTimeLine);
           setDataRefresh(false);
           this.time = time;
       }
   
       @Override
       public void loadFinishAndAdd(NewsTimeLine newsTimeLine, String time) {
           zhiHuAdapter.addData(newsTimeLine);
           this.time = time;
       }
   
       @Override
       public void loadFailure() {
           setDataRefresh(false);
           zhiHuAdapter.updateLoadStatus(zhiHuAdapter.getLOAD_FAILURE());
       }
   
       @Override
       protected void initView(View rootView) {
           super.initView(rootView);
           initConf();
       }
   
       @Override
       public void TsShow(String msg) {
           Toast.makeText(getActivity(), msg, Toast.LENGTH_SHORT).show();
       }
   }
   

   我们在这个看到一个mPresenter。这个是什么鬼？是从哪里来的？事实上这个就是Presenter的对象了。也是BaseActivity的泛型里面的那个

   watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="">我们点取查看它的引用，发如今这个fragment里面一共被引用了3次。第一次是刚进去页面的时候，第一次读取数据。第二个是下拉载入的时候，读取了下一波的数据。再有一次是上拉刷新的时候。我们又一次刷新了一次页面拿取了最新的一波数据，可是？拿数据的在哪里呢？网络请求呢？在哪里？？

5. 我们看Presenter里面做的操作吧：

   package mvpmaster.lht.com.lht.ui.fragment.zhuhu;
   
   import mvpmaster.lht.com.lht.base.BasePresenter;
   import mvpmaster.lht.com.lht.conf.OkHttpCallBack;
   import mvpmaster.lht.com.lht.ui.beanIml.NewsTimeLine;
   
   /**
    * Created by Ly on 2016/11/2.
    */
   
   public class ZhiHuPresenter extends BasePresenter<ZhiHuContract.ZhiHuView> implements ZhiHuContract.ZhiHuPresenter {
       private ZhiHuContract.ZhiHuView zhiHuView;
       private ZhiHuContract.ZhiHuModel zhiHuModel;
   
       public ZhiHuPresenter(ZhiHuContract.ZhiHuView zhiHuView) {
           this.zhiHuView = zhiHuView;
           zhiHuModel = new ZhiHuModel();
       }
   
       @Override
       public void getDataList() {
           zhiHuModel.getDataList(new OkHttpCallBack<NewsTimeLine>() {
               @Override
               public void onSuccess(NewsTimeLine newsTimeLine) {
                   zhiHuView.loadFinishAndReset(newsTimeLine, newsTimeLine.getDate());
               }
   
               @Override
               public void onFaild(Throwable e) {
                   loadError(e);
                   zhiHuView.loadFailure();
               }
   
               @Override
               public void onFinish() {
   
               }
           });
       }
   
       @Override
       public void getBeforeDateList(String time) {
           zhiHuModel.getBeforeDateList(time, new OkHttpCallBack<NewsTimeLine>() {
               @Override
               public void onSuccess(NewsTimeLine newsTimeLine) {
                   zhiHuView.loadFinishAndAdd(newsTimeLine, newsTimeLine.getDate());
               }
   
               @Override
               public void onFaild(Throwable e) {
                   loadError(e);
                   zhiHuView.loadFailure();
               }
   
               @Override
               public void onFinish() {
   
               }
           });
       }
   
       private void loadError(Throwable throwable) {
           throwable.printStackTrace();
           zhiHuView.TsShow(throwable.getMessage());
       }
   }
   

   我们看到有三个ovver的方法。各自是刷新（第一次读取），载入。读取失败 三种情况：我们能够看到，这个类持有了View和Model两个模块，在方法体里面，我们调用了model的方法去做耗时，在结果方法体里面我们调用了view的方法去改动UI，同一时候presenter这个模块又被view持有了，view能够在声明周期里面去调用特定的方法，view和presenter相互沟通。view和model全然隔离，presenter调控model，presenter沟通全局。

补上我的git地址：https://github.com/LinHuanTanLy/mvpMaster

补上另外一个请求框架：https://github.com/LinHuanTanLy/OkHttpWithSession