安卓MVP框架

理解MVP

原文地址

效果图：

 

 

项目结构：

 

实现

一、Model层

首先定义一个实体类User，其次就是业务类，抽取了一个接口 IUserBiz，在这个登录界面连接服务器只有一个登录方法 Login() ，耗时操作需要开辟子线程，再用一个回调接口来通知登录的状态，成功或者失败

package demo.example.com.mvp3.bean;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

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

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

package demo.example.com.mvp3.biz;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

public interface IUserBiz {
    void login(String name, String pwd, OnLoginListener listener);
}

package demo.example.com.mvp3.biz;

import demo.example.com.mvp3.bean.User;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

public interface OnLoginListener {
    void loginSuccess(User user);

    void loginFaild();
}

package demo.example.com.mvp3.biz;

import demo.example.com.mvp3.bean.User;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

public class UserBiz implements IUserBiz {
    @Override
    public void login(final String name, final String pwd, final OnLoginListener listener) {
        new Thread() {
            @Override
            public void run() {
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                if ("yl".equals(name) && "123456".equals(pwd)) {
                    User user = new User();
                    user.setUsername(name);
                    user.setPassword(pwd);
                    listener.loginSuccess(user);
                } else {
                    listener.loginFaild();
                }
            }
        }.start();
    }
}

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二、Presenter层

本来应该放到View层后面说的，个人感觉放在前面更利于理解MVP整体流程的搭建，界面整体的用户交互的功能有两个，“登录”和“清除”，所以Presenter中有两个方法，即 login() 和 clear()

package demo.example.com.mvp3.presenter;

import android.os.Handler;
import android.widget.ProgressBar;

import demo.example.com.mvp3.bean.User;
import demo.example.com.mvp3.biz.IUserBiz;
import demo.example.com.mvp3.biz.OnLoginListener;
import demo.example.com.mvp3.biz.UserBiz;
import demo.example.com.mvp3.view.IUserLoginView;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

public class UserLoginPresenter {
    private IUserBiz userBiz;
    private IUserLoginView userLoginView;
    private Handler mHandler = new Handler();

    public UserLoginPresenter(IUserLoginView userLoginView) {
        this.userLoginView = userLoginView;
        this.userBiz = new UserBiz();
    }


    public void Login() {
        userLoginView.showLoading();
        userBiz.login(userLoginView.getName(), userLoginView.getPwd(), new OnLoginListener() {
            @Override
            public void loginSuccess(User user) {
                //需要在UI线程执行
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        userLoginView.toMainActivity();
                        userLoginView.hideLoading();
                    }
                });
            }

            @Override
            public void loginFaild() {
                //需要在UI线程执行
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        userLoginView.showFaildError();
                        userLoginView.hideLoading();
                    }
                });

            }
        });
    }

    public void clear() {
        userLoginView.clearName();
        userLoginView.clearPwd();
    }
}

三、View层

再考虑用户操作后的UI上面的逻辑

package demo.example.com.mvp3.view;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

public interface IUserLoginView {
    String getName();

    String getPwd();

    void showLoading();

    void hideLoading();

    void toMainActivity();

    void showFaildError();

    void clearName();

    void clearPwd();
}

package demo.example.com.mvp3.view;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import demo.example.com.mvp3.MainActivity;
import demo.example.com.mvp3.R;
import demo.example.com.mvp3.presenter.UserLoginPresenter;

/**
 * Created by Administrator on 2018/5/9 0009.
 */

public class UserLoginActivity extends AppCompatActivity implements IUserLoginView {

    private EditText etName, etPwd;
    private Button btnLogin, btnClear;
    private ProgressBar pbLogin;

    private UserLoginPresenter userLoginPresenter = new UserLoginPresenter(this);

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        initView();
    }

    private void initView() {
        etName = findViewById(R.id.user_name);
        etPwd = findViewById(R.id.user_pwd);
        btnLogin = findViewById(R.id.btn_login);
        btnClear = findViewById(R.id.btn_clear);
        pbLogin = findViewById(R.id.pb_login);

        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                userLoginPresenter.Login();
            }
        });
        btnClear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                userLoginPresenter.clear();
            }
        });
    }

    @Override
    public String getName() {
        return etName.getText().toString();
    }

    @Override
    public String getPwd() {
        return etPwd.getText().toString();
    }

    @Override
    public void showLoading() {
        pbLogin.setVisibility(View.VISIBLE);
    }

    @Override
    public void hideLoading() {
        pbLogin.setVisibility(View.GONE);
    }

    @Override
    public void toMainActivity() {
        startActivity(new Intent(this, MainActivity.class));
    }

    @Override
    public void showFaildError() {
        Toast.makeText(this, "名字还是密码写错啦！", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void clearName() {
        etName.setText("");
    }

    @Override
    public void clearPwd() {
        etPwd.setText("");
    }
}