Android MVP简介

• 近期刚好在做新项目，简单介绍下自己的MVP

1.先介绍下View的结构

1.通常会有一个BaseActivity,代码如下：

/**
 * @Description:
 * @Author: kele
 * @email: 984127585@qq.com
 * @Date: 2020/6/19 0019
 */
public abstract class BaseActivity<T extends IBaseP> extends AppCompatActivity {

    protected T mPresenter;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_base);
        mPresenter = createPresenter();
        init();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (null != mPresenter) {
            mPresenter.onVDestroy();
        }
    }

    /**
     * 初始化Presenter
     *
     * @return
     */
    protected abstract T createPresenter();

    /**
     * 初始化
     */
    protected abstract void init();
}

2.以登录界面为例：

/**
 * Des: 登录界面
 * Created by kele on 2020/7/17.
 * E-mail:984127585@qq.com
 */
public class LoginActivity extends BaseActivity<LoginP> implements LoginControl.V {

    @Override
    protected LoginP createPresenter() {
        return new LoginP(this);
    }

    @Override
    protected void init() {
        if (null != mPresenter) {
             mPresenter.login("账号", "密码");
        }
    }

    @Override
    public void loginEd(boolean isSuc, UserInfoBean bean, String errMsg) {
        //结果处理
    }

}

• 上面介绍的基本的View的实现，下面开始介绍MVP的具体实现

2.MVP具体实现

1.抽出统一操作方法到最底层

IBaseM，代码如下：

/**
 * @Description:
 * @Author: kele
 * @email: 984127585@qq.com
 * @Date: 2020/6/19 0019
 */
public interface IBaseM {

    /**
     * 销毁M相关的内容
     */
    void onVDestroy();
}

IBaseV，代码如下：

/**
 * @Description:
 * @Author: kele
 * @email: 984127585@qq.com
 * @Date: 2020/6/19 0019
 */
public interface IBaseV {

}

IBaseP，代码如下：

/**
 * @Description:
 * @Author: kele
 * @email: 984127585@qq.com
 * @Date: 2020/6/19 0019
 */
public interface IBaseP {

    /**
     * 销毁P相关的内容
     */
    void onVDestroy();
}

2.M、V、P对应的Base

BaseM，代码如下：

/**
 * @Description:
 * @Author: kele
 * @email: 984127585@qq.com
 * @Date: 2020/6/19 0019
 */
public class BaseM<T extends IBaseP> implements IBaseM {

    /**
     * 请求器列表-用于取消请求
     */
    protected List<Disposable> disposableList = new ArrayList<>();

    protected T iBaseP;

    @Override
    public void onVDestroy() {
        if (null != iBaseP) {
            iBaseP = null;
        }
        //取消所有请求
        if (disposableList.size() > 0) {
            for (Disposable d : disposableList) {
                if (!d.isDisposed()) {
                    d.dispose();
                }
            }
        }
    }
}

BaseV 即上面的BaseActivity或者BaseFragment等

BaseP，代码如下：

/**
 * @Description:
 * @Author: kele
 * @email: 984127585@qq.com
 * @Date: 2020/6/19 0019
 */
public class BaseP<T extends IBaseV,S extends IBaseM> implements IBaseP{

    protected T iBaseV;
    protected S iBaseM;

    @Override
    public void onVDestroy() {
        if (null != iBaseV) {
            iBaseV = null;
        }
        if (null != iBaseM) {
            iBaseM.onVDestroy();
            iBaseM = null;
        }
    }
}

3.具体到对应的页面或者View的实现，同样以登录为例

• LoginControl 登录控制类，代码如下：

/**
 * Des:
 * Created by kele on 2020/7/17.
 * E-mail:984127585@qq.com
 */
public interface LoginControl {
    interface M extends IBaseM {
        void login(String userName, String pwd);
    }

    interface V extends IBaseV {
        void loginEd(boolean isSuc, UserInfoBean bean, String errMsg);
    }

    interface P extends IBaseP {
        void login(String un, String pwd);

        void loginEd(boolean isSuc, UserInfoBean bean, String errMsg);
    }
}

• LoginM，代码如下：

/**
 * Des:
 * Created by kele on 2020/7/17.
 * E-mail:984127585@qq.com
 */
public class LoginM extends BaseM<LoginP> implements LoginControl.M {

    private LoginHttpService loginS;

    public LoginM(LoginP p) {
        if (null == p) {
            return;
        }
        iBaseP = p;
        if (null == loginS) {
            loginS = RetrofitManager.getInstance().createService(LoginHttpService.class);
        }
    }

    @Override
    public void login(String userName, String pwd) {
        if (null == iBaseP) {
            return;
        }
        if (null == loginS) {
            return;
        }
        GetUserInfoRequestBean userInfoBean = RequestBeanFactory.getInstance().getUserInfoBean(userName, pwd);
        Observable<BaseResponse<UserInfoBean>> userLogin = loginS.userLogin(userInfoBean);
        Disposable userLoginDis = userLogin
                .compose(ResponseTransformer.<UserInfoBean>handleResult())
                .compose(SchedulerProvider.getInstance().<UserInfoBean>applySchedulers())
                .subscribe(new Consumer<UserInfoBean>() {
                    @Override
                    public void accept(UserInfoBean bean) throws Exception {
                        if (null == iBaseP) {
                            return;
                        }
                        iBaseP.loginEd(true, bean, "");
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        if (null == iBaseP) {
                            return;
                        }
                        String errMsg = throwable.getMessage();
                        if (throwable instanceof ApiException) {
                            errMsg = ((ApiException) throwable).getDisplayMessage();
                        }
                        iBaseP.loginEd(false, null, errMsg);
                    }
                });
        disposableList.add(userLoginDis);
    }
}

• LoginV 即上面的LoginActivity

• LoginP，代码如下：

/**
 * Des:
 * Created by kele on 2020/7/17.
 * E-mail:984127585@qq.com
 */
public class LoginP extends BaseP<LoginControl.V, LoginM> implements LoginControl.P {

    public LoginP(LoginControl.V v) {
        if (null == v) {
            return;
        }
        this.iBaseV = v;
        this.iBaseM = new LoginM(this);
    }

    @Override
    public void login(String un, String pwd) {
        if (null == iBaseM) {
            return;
        }
        iBaseM.login(un, pwd);
    }

    @Override
    public void loginEd(boolean isSuc, UserInfoBean bean, String errMsg) {
        if (null == iBaseV) {
            return;
        }
        iBaseV.loginEd(isSuc, bean, errMsg);
    }

    @Override
    public void onVDestroy() {
        super.onVDestroy();
    }
}

• 欢迎交流