Android封装MVP实现登录注册功能

import com.bwei.mvps.bean.UserBean;

/**
 * 1. 类的用途
 * 2. @author forever
 * 3. @date 2017/9/1 16:00
 */

public interface IUserModel {
 void setFirstName(String firstName);

 void setLastName(String lastName);

 String getFirstName();

 String getLastName();

 //根据id获取对象
 UserBean load(int id);
}

import android.util.Log;

import com.bwei.mvps.bean.UserBean;

/**
 * 1. 类的用途
 * 2. @author forever
 * 3. @date 2017/9/1 16:04
 */

public class UserModel implements IUserModel {
 @Override
 public void setFirstName(String firstName) {
 Log.i("xxx", firstName);
 }

 @Override
 public void setLastName(String lastName) {
 Log.i("xxx", lastName);

 }

 @Override
 public String getFirstName() {
 return null;
 }

 @Override
 public String getLastName() {
 return null;
 }

 @Override
 public UserBean load(int id) {
 //查询数据库或联网获取数据
 Log.i("fff", id + "");

 return new UserBean("张", "三");
 }
}

/**
 * 1. 类的用途
 * 2. @author forever
 * 3. @date 2017/9/1 15:53
 */

public interface UserView {
 void setFirstName(String firstName);

 void setLastName(String lastName);

 int getId();

 String getFirstName();

 String getLastName();
}

import android.util.Log;

import com.bwei.mvps.MainActivity;
import com.bwei.mvps.bean.UserBean;
import com.bwei.mvps.model.IUserModel;
import com.bwei.mvps.model.UserModel;
import com.bwei.mvps.view.UserView;

/**
 * 1. 类的用途
 * 2. @author forever
 * 3. @date 2017/9/1 16:05
 */

public class UserPresenter {

 private UserView userview;
 private final IUserModel iUserModel;

 public UserPresenter(UserView userview) {
 this.userview = userview;
 iUserModel = new UserModel();

 }

 //保存数据
 public void saveUser(int id, String firstName, String lastName) {
 UserBean userBean = iUserModel.load(id);
 Log.i("sss", "id:" + id + ",firstName:" + firstName + ",lastName:" + lastName);

 }

 //查询数据
 public void find(int id) {
 UserBean userBean = iUserModel.load(id);
 String firstName = userBean.getFirstName();
 String lastName = userBean.getLastName();
 userview.setFirstName(firstName);
 userview.setLastName(lastName);

 Log.i("aaa", "id:" + id + ",firstName:" + firstName + ",lastName:" + lastName);

 }
}

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout

 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical" 

 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal" 

 <TextView
  android:layout_width="70dp"
  android:layout_height="wrap_content"
  android:text="ID"/ 

 <EditText
  android:id="@+id/et_id"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"/ 
 </LinearLayout 

 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal" 

 <TextView
  android:layout_width="70dp"
  android:layout_height="wrap_content"
  android:text="FirstName"/ 

 <EditText
  android:id="@+id/et_first_name"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"/ 
 </LinearLayout 

 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal" 

 <TextView
  android:layout_width="70dp"
  android:layout_height="wrap_content"
  android:text="LastName"/ 

 <EditText
  android:id="@+id/et_last_name"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"/ 
 </LinearLayout 

 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal" 

 <Button
  android:id="@+id/bt_register"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:text="注册"/ 

 <Button
  android:id="@+id/bt_login"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:text="登录"/ 
 </LinearLayout 
</LinearLayout 

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

import com.bwei.mvps.presenter.UserPresenter;
import com.bwei.mvps.view.UserView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener, UserView {

 private EditText et_id;
 private EditText et_first_name;
 private EditText et_last_name;
 private Button bt_login;
 private Button bt_register;
 private UserPresenter userPresenter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 //找控件
 et_id = (EditText) findViewById(R.id.et_id);
 et_first_name = (EditText) findViewById(R.id.et_first_name);
 et_last_name = (EditText) findViewById(R.id.et_last_name);
 bt_login = (Button) findViewById(R.id.bt_login);
 bt_register = (Button) findViewById(R.id.bt_register);
 bt_login.setOnClickListener(this);
 bt_register.setOnClickListener(this);
 //声明UserPresenter
 userPresenter = new UserPresenter(this);

 }

 @Override
 public void onClick(View view) {
 switch (view.getId()) {
  case R.id.bt_register://保存数据
  userPresenter.saveUser(getId(), getFirstName(), getLastName());
  break;
  case R.id.bt_login:
  userPresenter.find(getId());
  break;
 }
 }

 @Override
 public void setFirstName(String firstName) {
 et_first_name.setText(firstName);
 }

 @Override
 public void setLastName(String lastName) {
 et_last_name.setText(lastName);
 }

 @Override
 public int getId() {
 return new Integer(et_id.getText().toString());
 }

 @Override
 public String getFirstName() {
 return et_first_name.getText().toString();
 }

 @Override
 public String getLastName() {
 return et_last_name.getText().toString();
 }
}