MVP设计模式和基本的模板
- View：Activity、Fragment、Dialog、Adapter等，该层不包含任何业务逻辑
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- Presenter：中介，View 与 Model 不发生联系，都通过 Presenter 传递
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- Model:相关的业务操作处理数据（如对数据库的操作、对网络等的操作都应该在Model层里）
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这个是我的项目结构
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对比于MVC模式，MVP无疑更适合Android的开发，MVP在层次结构上更适合清晰View只能和Presenter进行交换而且是双向的。Modle也只能和Presnter进行交互，无疑降低了代码的耦合性。
下面是在MVP模式下基本的模板
Iview
public interface IView<P> {
P createPresenter();
}
Iview的方法只有一个就是创建一个Present
BaseMode
public abstract class BaseModel<P extends BasePresenter> {
public P mPresenter;
public BaseModel(P presenter) {
this.mPresenter = presenter;
}
}
BaseMode里面有自己的Present，而且在创建Mode的时候必须创建一个Present，由于使用泛型就不用再自己创建一遍，由于java的单继承其实我将它写成抽象类也很无奈。
BasePresenter
public abstract class BasePresenter<V extends IView, M extends BaseModel> {
public V mView;
public M mModel;
public void attach(V view) {
mView = view;
mModel = createModel();
}
public abstract M createModel();
public void detach() {
mView = null;
}
}
在Presenter里面持有自己的view和Modle 并且有一个attach方法 在view创建Present后就进行attach
而在view销毁时进行detach，而attch时候创建了自己的Modle并持有了view
下面是最重要的Activity和Fragment
BaseActivity
public abstract class BaseActivity extends AppCompatActivity {
protected final String TAG = getClass().getSimpleName();
public static BaseActivity activity;
private Unbinder mUnbinder;
public FragmentMgr fragmentMgr;
protected SystemBarTintManager sm;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = this;
((MyApplication) MyApplication.getContext()).addActivity(this);
setContentView(getLayoutRes());
init();
sm = new SystemBarTintManager(this);
sm.setStatusBarTintEnabled(true);
sm.setStatusBarTintColor(getResources().getColor(R.color.colorPrimaryDark));
}
@Override
public void setContentView(@LayoutRes int layoutResID) {
super.setContentView(layoutResID);
mUnbinder = ButterKnife.bind(this);
}
@Override
public void setContentView(View view) {
super.setContentView(view);
mUnbinder = ButterKnife.bind(this);
}
protected abstract int getLayoutRes();
@Override
protected void onResume() {
super.onResume();
activity = this;
}
@Override
protected void onPause() {
super.onPause();
activity = null;
}
private void init() {
initData();
initEvents();
}
/***
* 初始化事件（监听事件等事件绑定）
*/
protected void initEvents() {
}
/**
* 绑定数据
*/
protected void initData() {
}
/**
* activity退出时将activity移出栈
*/
@Override
protected void onDestroy() {
mUnbinder.unbind();
super.onDestroy();
((MyApplication) MyApplication.getContext()).removeActivity(this);
}
}
BaseAcitvity想必大家都有自己的模板，我这里的BaseActivity主要是将setcontentlayout 和界面的初始化数据还有相应时间分割开来
MVPActivity
public abstract class MvpFragment<P extends BasePresenter> extends BaseFragment implements IView<P> {
public P mPresenter;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPresenter = createPresenter();
if (mPresenter != null) {
mPresenter.attach(MvpFragment.this);
}
}
@Override
public void onDestroy() {
if (mPresenter != null) {
mPresenter.detach();
}
super.onDestroy();
}
}
这里的主要是创建一个Presenter并且attach他还有在destory的时候detch
BaseFragment
public abstract class BaseFragment extends Fragment {
Unbinder mUnbinder;
Toolbar mToolbar;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
Log.d("BaseFragment",this.getClass().getSimpleName()+"onCreateView");
return super.onCreateView(inflater, container, savedInstanceState);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mUnbinder = ButterKnife.bind(this, view);
mToolbar = (Toolbar) view.findViewById(R.id.toolbar);
init();
Log.d("BaseFragment", this.getClass().getSimpleName()+"onViewCreated");
}
private void init() {
initEvent();
initData();
}
protected abstract void initEvent();
protected abstract void initData();
protected void initToolbar(String title) {
if (mToolbar != null) {
mToolbar.setTitle(title);
((AppCompatActivity) getActivity()).setSupportActionBar(mToolbar);
}
ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
@Override
public void setMenuVisibility(boolean menuVisible) {
super.setMenuVisibility(menuVisible);
if (this.getView() != null)
this.getView().setVisibility(menuVisible ? View.VISIBLE : View.GONE);
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("BaseFragment", this.getClass().getSimpleName()+ "onCreate");
}
@Override
public void onPause() {
super.onPause();
Log.d("BaseFragment", this.getClass().getSimpleName()+ "onPause");
}
@Override
public void onStart() {
super.onStart();
Log.d("BaseFragment", this.getClass().getSimpleName()+ "onStart");
}
@Override
public void onDestroy() {
mUnbinder.unbind();
super.onDestroy();
Log.d("BaseFragment",this.getClass().getSimpleName()+"onDestroy");
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
Log.d("BaseFragment", this.getClass().getName() + "onAttach");
}
@Override
public void onDestroyView() {
super.onDestroyView();
Log.d("BaseFragment", this.getClass().getSimpleName()+ "onDestroyView");
}
@Override
public void onDetach() {
super.onDetach();
Log.d("BaseFragment", this.getClass().getSimpleName()+"onDetach");
}
}
这里也是类似Activity 将初始化界面数据和点击事件分开。不使用butterknife的可以去掉
MvpFragement
public abstract class MvpFragment<P extends BasePresenter> extends BaseFragment implements IView<P> {
public P mPresenter;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPresenter = createPresenter();
if (mPresenter != null) {
mPresenter.attach(MvpFragment.this);
}
}
@Override
public void onDestroy() {
if (mPresenter != null) {
mPresenter.detach();
}
super.onDestroy();
}
}
这里类似于MVPActivity
