一个使用Jetpack设计的MVP + MVVM开发模式
- 支持标准MVP用法，Activity或者Fragment作为P，可配置DataBinder
- 支持ViewModel + liveData的简易用法，可快速实现MVVM
- 支持view复用
- 支持AndroidX
如何引入
implementation jzw.mvp:jetpmvp:1.0.1
一、MVVM简易模式用法，使用ViewModel和LiveData处理数据
1、创建数据模型model类，构造页面需要的所有数据，必须继承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 清理数据
}
}
2、创建处理数据的ViewModel类，必须继承BaseViewModel，负责处理网络或者本地数据
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，这里仅以Activity为例。
@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());
}
}
- 必须添加@BindViewModel注解来指定处理数据的ViewModel类
- 指定Model与ViewModel的泛型类型
- 使用viewModel提供的接口处理数据
- 在onModelChanged回调方法中监听数据变化，更新UI
二、升级版MVP模式用法
1、view创建，只处理UI显示部分,必须继承AppViewDelegate或者IViewDelegate接口，view只提供设置UI数据的方法或者获取控件的方法
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、创建DataBinder类，当model数据变化时负责将model的数据更新到对应的view，需要指定view与model的类型
public class UserDataBinder implements IDataBinder<UserView, UserModel> {
@Override
public void notifyModelChanged(UserView viewDelegate, UserModel data) {
//真正通知View 更新UI，根据view层提供的方法设置数据
viewDelegate.setUser(data.getUsers());
}
}
3、创建model类，里面包含View需要的所有数据，同简易模式一样，唯一不同的是，这里需要使用@BindDataBinder注解指定dataBinder，可以是多个
@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创建，也就是Activity或者Fragment，必须使用@BindDataBinder注解指定绑定数据的dataBinder
@BindDataBinder(dataBinder = UserDataBinder.class)
public class UserListActivity extends ActivityPresenter<UserView> {
private UserModel model;
@Override
public Class<UserView> getViewDelegateClass() {
return UserView.class;
}
/**
* 所有的初始化工作处理完毕回调
*
* @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) {
//设置数据
model.setUsers(users);
//通知更新UI
notifyModelChange(model);
}
});
}
}
- 使用@BindDataBinder注解指定绑定数据的dataBinder
- 指定View泛型的实际类型
- getViewDelegateClass（）方法返回对应View代理的class
- 在onPresenterCreated（）回调方法中处理逻辑，我这里使用了ViewModel来处理的数据
