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开发架构 "MVC""MVP"

平时开发中经常使用 MVC 开发架构模式，对于 MVP ，MVVP 架构模式也常听于耳，工作业余时间简单梳理其之前的逻辑关系：

MVC 架构

Model：实体模型（JavaBean）；
View ： 对应布局文件；
Controllor： 对应Activity业务逻辑，数据处理和UI处理；

MVC 模式

MVP 架构「业务逻辑在Presenter」

MVC 模式使得 Activity 承担功能较多，代码量大，MVP 是其进化架构模式

Model：实体模型（JavaBean）；
View：xml 与 Activity 负责View绘制与用户交互；
Presenter：负责完成View与Model之间交互与业务逻辑；

MVP 模式

MVP 登录代码结构:

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1. Model 代码 User

public class User {
    private String userName;
    private String password;

    public User(String userName, String password) {
        this.userName = userName;
        this.password = password;
    }
    ... ignore getter & setter ...
}

2. View 层代码

① 提取 ILoginView 接口代码如下：

public interface ILoginView {

    void onCLearText();
    void onLoginResult(Boolean result,int code);
}

② ILoginView 的实现类也就是我们的 LoginActivity

public class LoginActivity extends AppCompatActivity
        implements View.OnClickListener, ILoginView {

    private Button mLoginBtn;
    private Button mClearBtn;
    private EditText mUserName;
    private EditText mPassword;
    private ILoginPresenter mLoginPresenter;
    private static final String TAG = "LoginActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mLoginBtn = findViewById(R.id.login_btn);
        mClearBtn = findViewById(R.id.clear_btn);
        mUserName = findViewById(R.id.user_name_edit);
        mPassword = findViewById(R.id.password_edit);

        mLoginBtn.setOnClickListener(this);
        mClearBtn.setOnClickListener(this);

        mLoginPresenter = new LoginPrisenter(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.login_btn:
                mLoginPresenter.doLogin(mUserName.getText().toString(),mPassword.getText().toString());
                break;
            case R.id.clear_btn:
                mLoginPresenter.clear();
                break;
            default:
                break;
        }
    }

    @Override
    public void onCLearText() {

        mUserName.setText("");
        mPassword.setText("");

    }

    @Override
    public void onLoginResult(Boolean result, int code) {
        if(result){
            Log.d(TAG, "onLoginResult: success");
            Toast.makeText(this,"Login Success!",Toast.LENGTH_LONG).show();

        }else {
            Log.d(TAG, "onLoginResult: failed");
            Toast.makeText(this,"Login Failed!",Toast.LENGTH_LONG).show();
        }
    }
}

3. Presenter代码

Presenter 业务逻辑抽象 ILoginPresenter 接口代码

public interface ILoginPresenter {
    public void clear();
    public void doLogin(String name, String password);
}

Presenter 实现类方法：

public class LoginPrisenter implements ILoginPresenter {
    private static final String TAG = "LoginPrisenter";
    private ILoginView mLoginView;
    private User mUser;

    public LoginPrisenter(ILoginView view) {
        mLoginView = view;
        mUser = new User("Liu","12345678");
    }

    @Override
    public void clear() {
        mLoginView.onCLearText();
    }

    @Override
    public void doLogin(String username, String password) {
        Log.d(TAG, "userName: "+username +"; password: "+password);
        boolean result = false;
        int code =0;
        if (username.equals(mUser.getUserName()) && password.equals(mUser.getPassword())){
            result = true;
            code =1;
        }else {
            result = false;
            code =0;
        }


        mLoginView.onLoginResult(result,code);
    }
}