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
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 {
@Override
public 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();
//findviewbyid
void 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private
ProgressDialog progressDialog;
@Override
protected 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
@Override
protected void onDestroy() {
super.onDestroy();
if(mPreenter != null){
mPreenter.destory();
mPreenter = null;
}
}
//数据加载前显示进度条
@Override
public void showLoading() {
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("数据加载中。。。。。。");
progressDialog.show();
}
//数据加载成功之后
@Override
public void hideLoading() {
progressDialog.dismiss();
}
@Override
public 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getViewById
View 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private
ProgressDialog progressDialog;
View view;
public BaseFragment() {
}
@Override
public 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
@Override
public void onDestroy() {
super.onDestroy();
if(mPreenter != null){
mPreenter.destory();
mPreenter = null;
}
}
//根据id查找控件
@Override
public View getViewById(int id) {
return view.findViewById(id);
}
@Override
public void showLoading() {
progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("数据加载中。。。。。。");
progressDialog.show();
}
@Override
public void hideLoading() {
progressDialog.dismiss();
}
@Override
public 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
@Override
public 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);
}
@Override
protected 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 {
@Override
public 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);
}
@Override
public void food() {
mView.showLoading(); //view数据加载前展示进度条
mModel.getFoodData(new StringCallback() {//model请求数据
@Override
public 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;
@Override
public int bindLayout() {
return R.layout.activity_food;
}
@Override
public 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
@Override
public void initData() {
mPreenter = new FoodPresenter(new FoodModel(),this);
mPreenter.food();
}
//展示数据
@Override
public 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_8
targetCompatibility 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;
@Override
protected 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
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View inflate = inflater.inflate(R.layout.fragment_buffer_knife, container, false);
unbinder = ButterKnife.bind(this, inflate);
return inflate;
}
@OnClick(R.id.btn)
public void onViewClicked() {
}
@Override
public void onDestroyView() {
super.onDestroyView();
unbinder.unbind();
}
}
五.Dagger2使用
https://www.jianshu.com/p/471b81ce6580