一個(gè)使用Jetpack設(shè)計(jì)的MVP + MVVM開(kāi)發(fā)模式
- 支持標(biāo)準(zhǔn)MVP用法，Activity或者Fragment作為P，可配置DataBinder
- 支持ViewModel + liveData的簡(jiǎn)易用法，可快速實(shí)現(xiàn)MVVM
- 支持view復(fù)用
- 支持AndroidX
如何引入
implementation jzw.mvp:jetpmvp:1.0.1
一、MVVM簡(jiǎn)易模式用法，使用ViewModel和LiveData處理數(shù)據(jù)
1、創(chuàng)建數(shù)據(jù)模型model類(lèi)，構(gòu)造頁(yè)面需要的所有數(shù)據(jù)，必須繼承IModel接口
public class StudentModel implements IModel {
private List<Student> users;
private String city;
public List<Student> getUsers() {
return users;
}
public void setUsers(List<Student> users) {
this.users = users;
}
@Override
public void clearData() {
//TODO 清理數(shù)據(jù)
}
}
2、創(chuàng)建處理數(shù)據(jù)的ViewModel類(lèi)，必須繼承BaseViewModel，負(fù)責(zé)處理網(wǎng)絡(luò)或者本地?cái)?shù)據(jù)
public class StudentViewModel extends BaseViewModel<StudentModel> {
private StudentModel model = new StudentModel();
public StudentViewModel(Application application) {
super(application);
}
public void initUser() {
List<Student> list = new ArrayList<>();
for (int i = 0; i < 10; i++) {
Student user = new Student("Name" + i, "18", "西安");
list.add(user);
}
model.setUsers(list);
notifyDataChanged(model);
}
}
3、Activity或者Fragment，這里僅以Activity為例。
@BindViewModel(StudentViewModel.class)
public class StudentActivity extends BaseActivity<StudentModel, StudentViewModel> {
private RecyclerView recyclerView;
private MyAdapter mAdapter;
@Override
public int getLayoutId() {
return R.layout.act_student;
}
@Override
public void onInitViews(Bundle savedInstanceState) {
recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
mAdapter = new MyAdapter(new ArrayList<Student>());
recyclerView.setAdapter(mAdapter);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL));
viewModel.initUser();
}
@Override
public void onModelChanged(StudentModel model) {
if (model == null) {
return;
}
mAdapter.setNewData(model.getUsers());
}
}
- 必須添加@BindViewModel注解來(lái)指定處理數(shù)據(jù)的ViewModel類(lèi)
- 指定Model與ViewModel的泛型類(lèi)型
- 使用viewModel提供的接口處理數(shù)據(jù)
- 在onModelChanged回調(diào)方法中監(jiān)聽(tīng)數(shù)據(jù)變化，更新UI
二、升級(jí)版MVP模式用法
1、view創(chuàng)建，只處理UI顯示部分,必須繼承AppViewDelegate或者IViewDelegate接口，view只提供設(shè)置UI數(shù)據(jù)的方法或者獲取控件的方法
public class UserView extends AppViewDelegate {
private RecyclerView recyclerView;
private Button btn;
private MyAdapter mAdapter;
@Override
public int getRootLayoutId() {
return R.layout.act_word;
}
@Override
public void initViews() {
super.initViews();
recyclerView = get(R.id.recyclerView);
btn = get(R.id.btnInsert);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mAdapter = new MyAdapter(new ArrayList<User>());
recyclerView.setAdapter(mAdapter);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.addItemDecoration(new DividerItemDecoration(getActivity(), DividerItemDecoration.HORIZONTAL));
}
public void setUser(List<User> user) {
mAdapter.setNewData(user);
}
public void onInsertClick(View v) {
}
}
2、創(chuàng)建DataBinder類(lèi)，當(dāng)model數(shù)據(jù)變化時(shí)負(fù)責(zé)將model的數(shù)據(jù)更新到對(duì)應(yīng)的view，需要指定view與model的類(lèi)型
public class UserDataBinder implements IDataBinder<UserView, UserModel> {
@Override
public void notifyModelChanged(UserView viewDelegate, UserModel data) {
//真正通知View 更新UI，根據(jù)view層提供的方法設(shè)置數(shù)據(jù)
viewDelegate.setUser(data.getUsers());
}
}
3、創(chuàng)建model類(lèi)，里面包含View需要的所有數(shù)據(jù)，同簡(jiǎn)易模式一樣，唯一不同的是，這里需要使用@BindDataBinder注解指定dataBinder，可以是多個(gè)
@BindDataBinder(dataBinder = UserDataBinder.class)
public class UserModel implements IModel {
private List<User> users;
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
@Override
public void clearData() {
}
}
4、Presenter創(chuàng)建，也就是Activity或者Fragment，必須使用@BindDataBinder注解指定綁定數(shù)據(jù)的dataBinder
@BindDataBinder(dataBinder = UserDataBinder.class)
public class UserListActivity extends ActivityPresenter<UserView> {
private UserModel model;
@Override
public Class<UserView> getViewDelegateClass() {
return UserView.class;
}
/**
* 所有的初始化工作處理完畢回調(diào)
*
* @param savedInstanceState
*/
@Override
public void onPresenterCreated(Bundle savedInstanceState) {
model = new UserModel();
UserViewModel viewModel = ViewModelProviders.of(this).get(UserViewModel.class);
viewModel.getUsers().observe(this, new Observer<List<User>>() {
@Override
public void onChanged(List<User> users) {
//設(shè)置數(shù)據(jù)
model.setUsers(users);
//通知更新UI
notifyModelChange(model);
}
});
}
}
- 使用@BindDataBinder注解指定綁定數(shù)據(jù)的dataBinder
- 指定View泛型的實(shí)際類(lèi)型
- getViewDelegateClass（）方法返回對(duì)應(yīng)View代理的class
- 在onPresenterCreated（）回調(diào)方法中處理邏輯，我這里使用了ViewModel來(lái)處理的數(shù)據(jù)
