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
- 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 - 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(); }
- 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
- 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。 - 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）
- 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。
- 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？？
- 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