我們的場(chǎng)景是大概實(shí)現(xiàn)一個(gè)基本的登錄請(qǐng)求魄缚，然后將數(shù)據(jù)返回給View層

一宏浩，Model 負(fù)責(zé)數(shù)據(jù)的獲取，并返回給Presenter

獲取數(shù)據(jù)的Model

public class LoginRequest {

    public String username;
    public String password;
    
    public void queryData(LoginView view) {
        LoginResult result = new LoginResult();
        result.isSucess = 1;
        result.result = "成功啦";
        view.onLoginResult(result);
    }
}

二吐咳，View 負(fù)責(zé)數(shù)據(jù)的展示等等

1会宪，首先是定義一個(gè)BaseView肖卧，其實(shí)就是一個(gè)空接口，代表一個(gè)View對(duì)象

public interface IBaseView {
}

2掸鹅，定義一個(gè)登錄View

public interface LoginView<E> extends IBaseView {
    void onLoginResult(E result);
}

3喜命，具體做業(yè)務(wù)邏輯的對(duì)象，實(shí)現(xiàn)LoginView

public class LoginActivity extends AppCompatActivity implements LoginView<LoginResult> {

    private LoginPresenter mLoginPersenter;
    
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        mLoginPersenter = new LoginPresenter(this);
        mLoginPersenter.attach(this);
    
        findViewById(R.id.btn_login).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LoginRequest r = new LoginRequest();
                r.username = "user";
                r.password = "password";
                mLoginPersenter.loginRequest(r);
            }
        });
    
    }
    
    @Override
    public void onLoginResult(LoginResult result) {
        if(result.isSucess == 1) {
            Toast.makeText(getApplicationContext(), result.result, Toast.LENGTH_SHORT).show();
        }
    
    }
}

LoginPresenter下面第三步會(huì)介紹到

三河劝，Presenter 負(fù)責(zé)向Model請(qǐng)求數(shù)據(jù)壁榕，并且返回給View

1，定義一個(gè)BasePresenter提供一些公共方法

public abstract class BasePresenter<E extends IBaseView> {
    private Context mContext;
    public BasePresenter(Context context) {
        this.mContext = context;
    }

    public E mView;
    public void attach(E e) {
        mView = e;
    }
    
    public void onDestory(){
        mContext = null
    }
}

2赎瞎，定義上一步提到的LoginPresenter牌里，

public class LoginPresenter extends BasePresenter<LoginView> {
    public LoginPresenter(Context context) {
        super(context);
    }
    
    public void loginRequest(LoginRequest reuest) {
        reuest.queryData(mView);
    }
    
    @Override
    public void onDestory() {
        super.onDestory();
    }
}

四，數(shù)據(jù)的類型

public class LoginResult {
    public int isSucess;
    public String result;
}

以上就是MVP實(shí)現(xiàn)的相關(guān)代碼。如有更好的方案牡辽，歡迎留言