Day3:MVP+ButterKnife+Dagger2的使用

一.MVP框架
- 1.框架发展过程：
- 2.MVP框架介绍：
- 3.使用MVP的好处：
- 4.结构图：
- 5.目录结构
二. lib_core核心库封装
- 1.model层：
- 2.view层：
- 3.presenter层：
三. app模块中请求大虾
四.ButterKnife的使用
- 1.介绍
- 2.使用
- - （1）依赖：
  - （2）android studio 插件安装：
  - (3)activity中使用
  - （4）fragment中使用：
五.Dagger2使用

一.MVP框架

1.框架发展过程：

mvc --> mvp–> mvvm -->mvpvm

2.MVP框架介绍：

MVP把Activity，Framgent中的UI逻辑抽象成View接口
把业务逻辑交给Presenter主持
Model类还是原来的Model

3.使用MVP的好处：

分离了视图逻辑和业务逻辑，降低了耦合
Activity只处理生命周期的任务，代码变得更加简洁
视图逻辑和业务逻辑分别抽象到了View和Presenter的接口中去，提高代码的可阅读性
业务逻辑抽到Presenter中去，避免后台线程引用着Activity导致Activity的资源无法被系统回收从而引起内存泄露和OOM

4.结构图：

5.目录结构

二. lib_core核心库封装

1.model层：

IModel：

/*** 数据层的公共方法*/
public interface IModel {//数据销毁方法void destroy();
}

BaseModel：

public class BaseModel implements IModel {@Overridepublic void destroy() {}
}

2.view层：

IView：

/*** 视图层的顶层. 是activity和 fragment的接口层*/
public interface IView {//加载提示信息void showLoading();//取消加载提示信息void hideLoading();//吐司提示void showToast(String msg);
}

IActivity：

/*** 所有Activity的顶层接口* 放一些页面共有的方法* 必须加载布局是必须的* 查找组件是必须的* 初始化数据源是必须的*/
public interface IActivity {//返回布局id，返回值int类型int bindLayout();//findviewbyidvoid initView();//数据void initData();
}

BaseActivity：


//所有的activity的基类:抽象类
public abstract class BaseActivity<P extends IPresenter> extends AppCompatActivity implements IView,IActivity{protected P mPreenter;//注意是protected不是privateProgressDialog progressDialog;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(bindLayout());initView();initData();}//当页面销毁的时候，将p层销毁：内存泄漏问题@Overrideprotected void onDestroy() {super.onDestroy();if(mPreenter != null){mPreenter.destory();mPreenter = null;}}//数据加载前显示进度条@Overridepublic void showLoading() {progressDialog = new ProgressDialog(this);progressDialog.setMessage("数据加载中。。。。。。");progressDialog.show();}//数据加载成功之后@Overridepublic void hideLoading() {progressDialog.dismiss();}@Overridepublic void showToast(String str) {Toast.makeText(this, ""+str, Toast.LENGTH_SHORT).show();}
}

IFragment：

public interface IFragment extends IActivity {//fragment中需要单独封装方法getViewByIdView getViewById(int id);
}

BaseFragment：

/**所有fragemnt的base基类*/
public abstract class BaseFragment<P extends IPresenter> extends Fragment implements IView,IFragment{protected P mPreenter;//注意是protected不是privateProgressDialog progressDialog;View view;public BaseFragment() {}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {view = inflater.inflate(bindLayout(), container, false);initView();initData();return view;}//当页面销毁的时候，将p层销毁：内存泄漏问题@Overridepublic void onDestroy() {super.onDestroy();if(mPreenter != null){mPreenter.destory();mPreenter = null;}}//根据id查找控件@Overridepublic View getViewById(int id) {return view.findViewById(id);}@Overridepublic void showLoading() {progressDialog = new ProgressDialog(getActivity());progressDialog.setMessage("数据加载中。。。。。。");progressDialog.show();}@Overridepublic void hideLoading() {progressDialog.dismiss();}@Overridepublic void showToast(String str) {Toast.makeText(getActivity(), ""+str, Toast.LENGTH_SHORT).show();}
}

3.presenter层：

IPresenter：

//持有层P层顶层接口：负责model和view通信
public interface IPresenter {//定义销毁的方法：内存泄漏问题void destory();
}

BasePresenter：

//P层：持有M和V
public class BasePresenter<M extends IModel,V extends IView> implements IPresenter{//注意m和v不能是private,是protected受保护，让子类访问该属性，private是不能访问protected  M mModel;protected  V mView;public BasePresenter(M mModel, V mView) {this.mModel = mModel;this.mView = mView;}//当p层销毁的时候我们需要将m和v销毁：内存泄漏@Overridepublic void destory() {if (mModel != null){mModel.destory();mModel = null;}if(mView != null){mView = null;}}
}

三. app模块中请求大虾

FoodAdapter:

public class FoodAdapter extends BaseQuickAdapter<FoodEntity.DataBean, BaseViewHolder> {public FoodAdapter(int layoutResId, @Nullable List<FoodEntity.DataBean> data) {super(layoutResId, data);}@Overrideprotected void convert(BaseViewHolder helper, FoodEntity.DataBean item) {ImageView imageView = helper.getView(R.id.iv);Glide.with(mContext).load(item.getPic()).into(imageView);helper.setText(R.id.tv,item.getTitle()+"");}
}

FoodEntity:

package com.bawei.day2_mvp2.food.entity;import java.util.List;public class FoodEntity {/*** ret : 1* data : [{"id":"8289","title":"油焖大虾","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/9/8289.jpg","collect_num":"1670","food_str":"大虾 葱 生姜 植物油 料酒","num":1670},{"id":"2127","title":"四川回锅肉","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2127.jpg","collect_num":"1592","food_str":"猪肉 青蒜 青椒 红椒 姜片","num":1592},{"id":"30630","title":"超简单芒果布丁","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/31/30630.jpg","collect_num":"1552","food_str":"QQ糖 牛奶 芒果","num":1552},{"id":"9073","title":"家常红烧鱼","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/10/9073.jpg","collect_num":"1426","food_str":"鲜鱼 姜 葱 蒜 花椒","num":1426},{"id":"10097","title":"家常煎豆腐","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10097.jpg","collect_num":"1420","food_str":"豆腐 新鲜红椒 青椒 葱花 油","num":1420},{"id":"10509","title":"水煮肉片","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10509.jpg","collect_num":"1342","food_str":"瘦猪肉 生菜 豆瓣酱 干辣椒 花椒","num":1342},{"id":"46968","title":"红糖苹果银耳汤","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/47/46968.jpg","collect_num":"1253","food_str":"银耳 苹果 红糖","num":1253},{"id":"10191","title":"麻婆豆腐","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10191.jpg","collect_num":"1224","food_str":"豆腐 肉末 生抽 白糖 芝麻油","num":1224},{"id":"2372","title":"皮蛋瘦肉粥","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2372.jpg","collect_num":"1151","food_str":"大米 皮蛋 猪肉 油条 香葱","num":1151},{"id":"2166","title":"蚂蚁上树","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2166.jpg","collect_num":"1145","food_str":"红薯粉 肉 姜 蒜 花椒","num":1145},{"id":"2262","title":"糖醋肉","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2262.jpg","collect_num":"1082","food_str":"猪肉 红椒 黄椒 洋葱 蛋清","num":1082},{"id":"9971","title":"鱼香豆腐","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/10/9971.jpg","collect_num":"1010","food_str":"豆腐 木耳 胡萝卜 香葱 番茄酱","num":1010},{"id":"10172","title":"干煸四季豆","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10172.jpg","collect_num":"993","food_str":"四季豆 干辣椒 蒜头 酱油 糖","num":993},{"id":"2685","title":"胡萝卜肉末蒸蛋","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2685.jpg","collect_num":"929","food_str":"胡萝卜 肉 蛋 生抽 盐","num":929},{"id":"9972","title":"虎皮青椒","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/10/9972.jpg","collect_num":"892","food_str":"青辣椒 大蒜 香醋 白糖 生抽","num":892},{"id":"10437","title":"叉烧排骨","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10437.jpg","collect_num":"806","food_str":"排骨 李锦记叉烧酱 植物油 清水 油菜","num":806},{"id":"2892","title":"\u201c五行\u201d彩蔬汤","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2892.jpg","collect_num":"761","food_str":"黑木耳 玉米 牛蒡 胡萝卜 西兰花","num":761},{"id":"2348","title":"麻辣肉丝面","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/3/2348.jpg","collect_num":"760","food_str":"面条 肉丝 淀粉 酱油 辣椒","num":760},{"id":"10044","title":"土豆炖翅根","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/11/10044.jpg","collect_num":"758","food_str":"土豆 翅根 葱 姜 料酒","num":758},{"id":"33783","title":"美人豆浆","pic":"http://www.qubaobei.com/ios/cf/uploadfile/132/34/33783.jpg","collect_num":"758","food_str":"黄豆 红豆 绿豆 黑豆 黑米","num":758}]*/private int ret;private List<DataBean> data;public int getRet() {return ret;}public void setRet(int ret) {this.ret = ret;}public List<DataBean> getData() {return data;}public void setData(List<DataBean> data) {this.data = data;}public static class DataBean {/*** id : 8289* title : 油焖大虾* pic : http://www.qubaobei.com/ios/cf/uploadfile/132/9/8289.jpg* collect_num : 1670* food_str : 大虾 葱 生姜 植物油 料酒* num : 1670*/private String id;private String title;private String pic;private String collect_num;private String food_str;private int num;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getPic() {return pic;}public void setPic(String pic) {this.pic = pic;}public String getCollect_num() {return collect_num;}public void setCollect_num(String collect_num) {this.collect_num = collect_num;}public String getFood_str() {return food_str;}public void setFood_str(String food_str) {this.food_str = food_str;}public int getNum() {return num;}public void setNum(int num) {this.num = num;}}
}

FoodContract:

//协议 规范方法名称
public interface FoodContract {//请求数据interface  IFoodModel extends IModel{void getFoodData(StringCallback stringCallback);}//展示数据interface IFoodView extends IView{void  showFoodData(FoodEntity foodEntity);}//p层规范方法interface IFoodPresenter extends IPresenter{void food();}}

FoodModel：

//网络请求
public class FoodModel extends BaseModel implements FoodContract.IFoodModel {@Overridepublic void getFoodData(StringCallback stringCallback) {OkGo.<String>get("http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=10&page=1").execute(stringCallback);}
}

FoodPresenter：

//p持有m和v
public class FoodPresenter extends BasePresenter<FoodContract.IFoodModel,FoodContract.IFoodView> implements FoodContract.IFoodPresenter {public FoodPresenter(FoodContract.IFoodModel mModel, FoodContract.IFoodView mView) {super(mModel, mView);}@Overridepublic void food() {mView.showLoading();   //view数据加载前展示进度条mModel.getFoodData(new StringCallback() {//model请求数据@Overridepublic void onSuccess(Response<String> response) {String string = response.body();FoodEntity foodEntity = new Gson().fromJson(string, FoodEntity.class);mView.showFoodData(foodEntity);//view展示数据mView.hideLoading();//view隐藏进度条}});}
}

FoodActivity:

public class FoodActivity extends BaseActivity<FoodPresenter> implements FoodContract.IFoodView{private RecyclerView recyclerView;private List<FoodEntity.DataBean> list = new ArrayList<>();private FoodAdapter foodAdapter;@Overridepublic int bindLayout() {return R.layout.activity_food;}@Overridepublic void initView() {recyclerView = findViewById(R.id.rv);foodAdapter = new FoodAdapter(R.layout.item,list);recyclerView.setAdapter(foodAdapter);recyclerView.setLayoutManager(new LinearLayoutManager(this));}//使用MVP请求数据@Overridepublic void initData() {mPreenter = new FoodPresenter(new FoodModel(),this);mPreenter.food();}//展示数据@Overridepublic void showFoodData(FoodEntity foodEntity) {List<FoodEntity.DataBean> data = foodEntity.getData();list.addAll(data);foodAdapter.notifyDataSetChanged();}
}

四.ButterKnife的使用

1.介绍

butter knife是出自JakeWharton的一个开源库，它通过注解的方式来替代android中view的相关操作。减少大量的findViewById以及setOnClickListener代码，且对性能的影响较小.

ButterKnife项目地址：https://github.com/JakeWharton/butterknife

ButterKnife的优势：
1、强大的View绑定和Click事件处理功能，简化代码，提升开发效率
2、方便的处理Adapter里的ViewHolder绑定问题
3、运行时不会影响APP效率，使用配置方便
4、代码清晰，可读性强

提示:

Butter Knife有多个版本,不同版本的初始化方法都不一样,且@Bind注解控件的后缀名也不同

2.使用

（1）依赖：

android {...// Butterknife requires Java 8.compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}
}dependencies {implementation 'com.jakewharton:butterknife:10.2.1'annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'
}

（2）android studio 插件安装：

setttings–>Plugins–> 里搜 ButterKnife ,下载后,重启软件.

(3)activity中使用

在布局文件setContentView(R.layout.activity_buffer_knife)
加粗的斜体字体上,点击右键. -> 选择generate ->找到Buffer选项.
会弹出如下的对话框：

如果需要点击事件,记得给OnClick打上对勾即可.

public class BufferKnifeActivity extends AppCompatActivity {@BindView(R.id.title)TextView title;@BindView(R.id.btn)Button btn;@BindView(R.id.btn1)Button btn1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_buffer_knife);ButterKnife.bind(this);}@OnClick(R.id.btn)public void onViewClicked() {}
}

（4）fragment中使用：

public class BufferKnifeFragment extends Fragment {@BindView(R.id.title)TextView title;@BindView(R.id.btn)Button btn;Unbinder unbinder;public BufferKnifeFragment() {// Required empty public constructor}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// Inflate the layout for this fragmentView inflate = inflater.inflate(R.layout.fragment_buffer_knife, container, false);unbinder = ButterKnife.bind(this, inflate);return inflate;}@OnClick(R.id.btn)public void onViewClicked() {}@Overridepublic void onDestroyView() {super.onDestroyView();unbinder.unbind();}
}

五.Dagger2使用

https://www.jianshu.com/p/471b81ce6580

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Day3:MVP+ButterKnife+Dagger2的使用

Day3:MVP+ButterKnife+Dagger2的使用

一.MVP框架

1.框架发展过程：

2.MVP框架介绍：

3.使用MVP的好处：

4.结构图：

5.目录结构

二. lib_core核心库封装

1.model层：

2.view层：

3.presenter层：

三. app模块中请求大虾

四.ButterKnife的使用

1.介绍

2.使用

（1）依赖：

（2）android studio 插件安装：

(3)activity中使用

（4）fragment中使用：

五.Dagger2使用

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