Android MVP开发模式实例

一、MVP关系

项目结构

二、项目
1.AndroidManifest.xml文件和bean

 <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mvp">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name="com.view.LoginViewActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="com.view.MainActivity"/>
    </application>

</manifest>

新建一个User对象
package com.bean;

/**
 * Created by c9736 on 2016/7/17.
 */
public class User {
private String username;
private String password;

public User(String username, String password) {
this.username = username;
this.password = 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;
    }
}

2.view

   package com.view;

/**
 * Created by c9736 on 2016/7/14.
 */
public interface ILoginView {
void onClearText();
    String getUserName();
    String getPassword();
void showLoading();
void hideLoading();
void toMainActivity();
void showFaildError();
}

package com.view;

import android.content.Intent;
import android.os.Bundle;

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 com.mvp.R;
import com.presenter.LoginPresenter;

/**
 * Created by c9736 on 2016/7/17.
 */
public class LoginViewActivity extends AppCompatActivity implements ILoginView{
private EditText mEtUsername, mEtPassword;
private Button mBtnLogin, mBtnClear;
private ProgressBar mPbLoading;
private LoginPresenter mUserLoginPresenter = new LoginPresenter(this);

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        initViews();
    }

private void initViews() {
//find view
        mEtUsername = (EditText) this.findViewById(R.id.username);
        mEtPassword = (EditText) this.findViewById(R.id.password);
        mBtnLogin = (Button) this.findViewById(R.id.login);
        mPbLoading = (ProgressBar) this.findViewById(R.id.progressBar);
        mBtnClear = (Button) this.findViewById(R.id.clear);
        mBtnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
                mUserLoginPresenter.doLogin(getUserName(),getPassword());
            }
        });
        mBtnClear.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
                mUserLoginPresenter.clear();
            }
        });
    }

@Override
public void onClearText() {
        mEtUsername.setText("");
        mEtPassword.setText("");
    }

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

@Override
public String getPassword() {
return mEtPassword.getText().toString();
    }

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

    }

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

@Override
public void toMainActivity() {
        Intent intent=new Intent(getApplicationContext(),MainActivity.class);
        startActivity(intent);

    }

@Override
public void showFaildError() {
        Toast.makeText(this,
"login failed", Toast.LENGTH_SHORT).show();

    }
}

    package com.view;

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

import com.mvp.R;
import com.presenter.ILoginPresenter;

public class MainActivity extends AppCompatActivity {

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

}

3.prsenter

    package com.presenter;

/**
 * Created by c9736 on 2016/7/14.
 */
public interface ILoginPresenter {
void clear();
void doLogin(String name,String password);
}

package com.presenter;

import com.bean.User;

/**
 * Created by c9736 on 2016/7/17.
 */
public interface OnLoginListener {
void loginSuccess(User user);
void loginFailed();
}

package com.presenter;

import android.os.Handler;

import com.model.IUserBiz;
import com.bean.User;
import com.model.UserBiz;
import com.view.ILoginView;

/**从View中获取需要的参数，交给Model去执行业务方法，执行的过程中需要传入listener以得到反馈结果，再让View用handler进行做对应的显示。
 * Created by c9736 on 2016/7/14.
 *
 */
public class LoginPresenter implements ILoginPresenter{
    ILoginView iLoginView;//用来操作view
private IUserBiz userBiz;//用来操作业务方法，获取数据等
    Handler handler ;//用来更新view
public LoginPresenter(ILoginView iLoginView) {
this.iLoginView = iLoginView;
this.userBiz=new UserBiz();
this.handler=new Handler();
    }




@Override
public void clear() {

        iLoginView.onClearText();
    }

@Override
public void doLogin(String name, String password) {

        iLoginView.showLoading();
        userBiz.login(iLoginView.getUserName(), iLoginView.getPassword(), new OnLoginListener() {
@Override
public void loginSuccess(final User user) {
//在UI线程中执行
                handler.post(new Runnable() {
@Override
public void run() {
                        iLoginView.toMainActivity();
                        iLoginView.hideLoading();
                    }
                });
            }

@Override
public void loginFailed() {

                handler.post(new Runnable() {
@Override
public void run() {
                        iLoginView.showFaildError();
                        iLoginView.hideLoading();
                    }
                });
            }
        });
    }


}

4 model

 package com.model;

import com.presenter.OnLoginListener;

/**
 * Created by c9736 on 2016/7/17.
 */
public interface IUserBiz {
public void login(String username,String password,OnLoginListener loginListener);
}

package com.model;

import com.bean.User;
import com.presenter.OnLoginListener;

/**
 * Created by c9736 on 2016/7/17.
 */
public class UserBiz implements IUserBiz{//用来操作逻辑业务，获取图片等数据

@Override
public void login(final String username, final String password, final OnLoginListener loginListener) {
new Thread(){
@Override
public void run() {
super.run();
try {
                    Thread.sleep(2000);
                }catch (InterruptedException e){
                    e.printStackTrace();
                }
if("chen".equals(username)&&"111".equals(password)){
                    User user=new User(username,password);
                    loginListener.loginSuccess(user);
                }else {
                    loginListener.loginFailed();
                }
            }
        }.start();
    }
}