android MVP + dagger2 + Retrofit + Rxjava+okhttp android基础项目框架搭建（2）--之MVP引入

上一篇文章中，我们已经成功的引入了Dagger2;今天我们将继续使用android MVP模式对代码进行实现。

#1 将MainActivity.java文件移动到ui包下，并在ui包下建立view包； view包下存放接口。包及类结构如图

 2 新建presenter包，并在presenter下建立相关的类， 如图

说明：图中RxMapPresenter为Presenter的基类， 该类继承BaseMapPresenter类； BaseMapPresenter提供子类实例化Presenter与View之间的接口对象的方法。RxMapPresenter 负责实例化CompositeSubscription对象， 子类使用该对象进行网络请求。

MainActivity.java代码如下

public class MainActivity extends BaseAcitvity implements MainView, HasComponent<MainComponent> {

@BindView(R.id.test)
TextView test;

@Inject
MainPresenter mainPresenter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
getComponent().inject(this);

//重要
mainPresenter.attachView(this);
}

@OnClick(R.id.test)
public void onClick() {
mainPresenter.login("", "");
}

@Override
public void loginSuccess(String userInfo) {
Toast.makeText(this, userInfo, Toast.LENGTH_LONG).show();
}

@Override
public void loginFail() {

}

@Override
public void loginException() {

}

@Override
public MainComponent getComponent() {
return DaggerMainComponent.builder()
.applicationComponent(Application.get(this).getComponent())
.activityModule(new ActivityModule(this))
.mainModule(new MainModule())
.build();
}

@Override
protected void onDestroy() {
super.onDestroy();
mainPresenter.detachView();
}
}

BaseAcitvity.java

public class BaseAcitvity extends Activity {
private ActivityComponent mActivityComponent;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}

public ActivityComponent getActivityComponent() {
if (mActivityComponent == null) {
mActivityComponent = DaggerActivityComponent.builder()
.activityModule(new ActivityModule(this))
.applicationComponent(Application.get(this).getComponent())
.build();
}
return mActivityComponent;
}
}

MainView.java

public interface MainView extends MvpView{
void loginSuccess(String userInfo);
void loginFail();
void loginException();
}

HasComponent.java

public interface HasComponent<C> {

C getComponent();
}

MainPresenter .java

public class MainPresenter extends RxMvpPresenter<MainView> {

@Inject
public MainPresenter() {

}

@Inject
Application context;

public void login(String username, String password) {
getMvpView().loginSuccess("MVP成功搭建");
}
}

RxMvpPresenter.java

public class RxMvpPresenter<V extends MvpView> extends BaseMvpPresenter<V> {

protected CompositeSubscription mCompositeSubscription;

@Override
public void attachView(V mvpView) {
super.attachView(mvpView);

mCompositeSubscription = new CompositeSubscription();
}

@Override
public void detachView() {
super.detachView();

mCompositeSubscription.clear();
mCompositeSubscription = null;
}
}

BaseMvpPresenter.java

public class BaseMvpPresenter<V> implements MvpPresenter<V> {

private V mMvpView;

@Override
public void attachView(V mvpView) {
mMvpView = mvpView;
}

@Override
public void detachView() {
mMvpView = null;
}

public boolean isViewAttached() {
return mMvpView != null;
}

public V getMvpView() {
return mMvpView;
}

public void checkViewAttached() {
if (!isViewAttached()) throw new MvpViewNotAttachedException();
}

public static class MvpViewNotAttachedException extends RuntimeException {
public MvpViewNotAttachedException() {
super("Please call Presenter.attachView(MvpView) before" +
" requesting data to the Presenter");
}
}
}

MvpPresenter.java

public interface MvpPresenter<V> {

@UiThread
void attachView(V view);

@UiThread
void detachView();

}

BaseAcitvity.java

public class BaseAcitvity extends Activity {
private ActivityComponent mActivityComponent;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}

public ActivityComponent getActivityComponent() {
if (mActivityComponent == null) {
mActivityComponent = DaggerActivityComponent.builder()
.activityModule(new ActivityModule(this))
.applicationComponent(Application.get(this).getComponent())
.build();
}
return mActivityComponent;
}
}

MvpView.java

public interface MvpView {
}

3. 运行项目， 点击屏幕上的HelloWold！文字， 如果出现 “MVP搭建成功”的文字说明android MVP环境搭建成功。

**下一篇我们将讲解如何引入Retrofit RxJava**

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