android Mvp简单实用

View 对应于Activity，负责View的绘制以及与用户交互
Model 依然是业务逻辑和实体模型
Presenter 负责完成View于Model间的交互

模拟客户端的登录操作，并实现登录成功与登录失败的回调。

1.bean文件

 package com.mvp.bean;

 public class UserBean {
     private String username;
     private String pwd;

     public UserBean() {
         super();
     }

     public UserBean(String username, String pwd) {
         super();
         this.username = username;
         this.pwd = pwd;
     }

     public String getUsername() {
         return username;
     }

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

     public String getPwd() {
         return pwd;
     }

     public void setPwd(String pwd) {
         this.pwd = pwd;
     }

 }

2.Model

 package com.mvp.model;

 import com.mvp.listener.OnLoginListener;

 public interface UserModel {
     // 登录
     void Login(String username, String pwd,OnLoginListener listener);
 }

3.Model的实现，OnLoginListener是成功、失败的回调

 package com.mvp.model;

 import android.annotation.SuppressLint;

 import com.mvp.listener.OnLoginListener;

 @SuppressLint("HandlerLeak")
 public class UserModelImpl implements UserModel {
     /**
      * 实现业务操作
      */
     @Override
     public void Login(final String username, String pwd,
             final OnLoginListener listener) {
         new Thread() {

             @Override
             public void run() {
                 if (username.equals("1")) {
                     listener.onSuccess();
                 } else if (username.equals("2")) {
                     listener.onError();
                 }
             }
         }.start();
     }
 }

4.UserView

 package com.mvp.view;

 public interface UserView {

     String getUserName();

     String getPwd();

     void showDialog(String title);
 }

5.Presenter

 package com.mvp.presenter;

 import android.os.Handler;

 import com.mvp.listener.OnLoginListener;
 import com.mvp.model.UserModel;
 import com.mvp.model.UserModelImpl;
 import com.mvp.view.UserView;

 public class UserPresenter {
     private UserModel userModel;
     private UserView userView;
     private Handler mHandler = new Handler();

     public UserPresenter(UserView userView) {
         this.userView = userView;
         userModel = new UserModelImpl();
     }

     public void login(String username, String pwd) {
         userModel.Login(username, pwd, new OnLoginListener() {

             @Override
             public void onSuccess() {
                 mHandler.post(new Runnable() {

                     @Override
                     public void run() {
                         userView.showDialog("success");
                     }
                 });
             }

             @Override
             public void onError() {
                 mHandler.post(new Runnable() {

                     @Override
                     public void run() {
                         userView.showDialog("error");
                     }
                 });
             }
         });
     }
 }

6.Activity文件

 package com.mvp.view;

 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;

 import com.mvp.presenter.UserPresenter;

 public class MainActivity extends Activity implements UserView, OnClickListener {
     private TextView tv_show;
     private EditText et_username, et_pwd;
     private Button btn_save, btn_clear;
     private UserPresenter userPresenter;
     private Context context;

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

     private void initView() {
         userPresenter = new UserPresenter(this);
         tv_show = (TextView) findViewById(R.id.tv_show);
         et_username = (EditText) findViewById(R.id.et_username);
         et_pwd = (EditText) findViewById(R.id.et_pwd);
         findViewById(R.id.btn_save).setOnClickListener(this);
         findViewById(R.id.btn_clear).setOnClickListener(this);
     }

     @Override
     public void onClick(View v) {
         switch (v.getId()) {
         case R.id.btn_save:
             userPresenter.login(getUserName(), getPwd());
             break;
         case R.id.btn_clear:
             break;
         }
     }

     @Override
     public String getUserName() {
         return et_username.getText().toString();
     }

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

     @Override
     public void showDialog(String title) {
         new AlertDialog.Builder(this).setTitle(title)
                 .setPositiveButton("确定", null).setNegativeButton("取消", null)
                 .show();
     }
 }