这是一个使用mvp模式实现模拟用户登录的简单Demo。

这是一个使用mvp模式实现模拟用户登录的简单Demo。

github项目地址：https://github.com/GodDavide/MVP

start

正文:

效果图

首先看一下文件结构：

代码书写顺序：熟悉了mvp之后，我掌握了属于自己风格的书写顺序，感觉思路较为清晰，不会遗漏某些信息。(仅个人观点，欢迎吐槽~~~)

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;
}
}

//接口类
public interface LoginModel {
void login(String username, String password, OnLoginListener onLoginListener);

interface OnLoginListener {
void loginSuccess(User user);

void loginFailed(String s);
}
}

//实现类
public class LoginModelImpl implements LoginModel {
@Override
public void login(final String username, final String password, final OnLoginListener onLoginListener) {
/**
* @author David  created at 2016/7/29 15:47
* 模拟子线程，执行耗时操作
*/
new Thread() {
@Override
public void run() {
super.run();
try {
Thread.sleep(3000);
if (username.equals("David") && password.equals("12345")) {
onLoginListener.loginSuccess(new User(username, password));
} else {
onLoginListener.loginFailed("Incorrect username or password.");
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}.start();
}
}

public interface LoginView {
//得到用户填写的信息
String getUsername();
String getPassword();

//显示和隐藏登录ProgressBar
void showLoading();
void hideLoading();

//登录成功或失败后，返回信息的方法
void showSuccessMsg(User user);
void showFailedMsg(String s);

//清楚数据
void clearEditText();
}

public class LoginPresenter {
private LoginView loginView;
private LoginModel loginModel;
private Handler mHandler;

public LoginPresenter(LoginView loginView) {
this.loginView = loginView;
loginModel = new LoginModelImpl();
mHandler = new Handler();
}

public void login() {
loginView.showLoading();
loginModel.login(loginView.getUsername(), loginView.getPassword(), new LoginModel.OnLoginListener() {
@Override
public void loginSuccess(final User user) {
//模拟登录成功后，返回信息到Activity,吐出成功信息
mHandler.post(new Runnable() {
@Override
public void run() {
loginView.showSuccessMsg(user);
loginView.hideLoading();
}
});
}

@Override
public void loginFailed(final String s) {
//模拟登录失败后，返回信息，吐出错误信息
mHandler.post(new Runnable() {
@Override
public void run() {
loginView.showFailedMsg(s);
loginView.hideLoading();
}
});
}
});
}

public void clear(){
loginView.clearEditText();
}
}

public class MvpActivity extends AppCompatActivity implements LoginView {

private EditText et_userName;
private EditText et_password;
private ProgressBar progressBar;
private LoginPresenter loginPresenter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mvp);
initview();
loginPresenter = new LoginPresenter(this);
}

private void initview() {
et_userName = (EditText) findViewById(R.id.main_et_username);
et_password = (EditText) findViewById(R.id.main_et_password);
progressBar = (ProgressBar) findViewById(R.id.main_progressBar);
}

//点击登录
public void LoginClick(View view) {
loginPresenter.login();
}

//点击清除
public void ClearClick(View view) {
loginPresenter.clear();
}

@Override
public String getUsername() {
return et_userName.getText().toString();
}

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

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

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

@Override
public void showSuccessMsg(User user) {
Toast.makeText(MvpActivity.this, "User " + user.getUsername() + " Login Sccess!", Toast.LENGTH_SHORT).show();
}

@Override
public void showFailedMsg(String s) {
Toast.makeText(MvpActivity.this, s, Toast.LENGTH_SHORT).show();
}

@Override
public void clearEditText() {
et_userName.setText("");
et_password.setText("");
}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
tools:context="com.god.mvp.MvpActivity">

<EditText
android:id="@+id/main_et_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入姓名"
android:textColorHint="#505050"
android:textSize="20dp" />

<EditText
android:id="@+id/main_et_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/main_et_username"
android:layout_marginTop="10dp"
android:hint="请输入姓名"
android:textColorHint="#505050"
android:textSize="20dp" />

<ProgressBar
android:id="@+id/main_progressBar"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_centerInParent="true"
android:visibility="gone" />

<ImageView
android:id="@+id/align"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/main_et_password"
android:layout_marginRight="30dp"
android:layout_marginTop="10dp"
android:layout_toLeftOf="@id/align"
android:onClick="LoginClick"
android:text="Login"

/>

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/main_et_password"
android:layout_marginLeft="30dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="@id/align"
android:onClick="ClearClick"
android:text="Clear" />

</RelativeLayout>

end

Thanks for you!!!

Have a nice day !!!