###这是一个使用mvp模式实现模拟用户登录的简单Demo。
(参考的网络资源：Thanks for hongyangAndroid)
期待共同进步
#####@Auther: David
#####@email ：[email protected]
#####Learn from yesterday, live for today, hope for tomorrow.
start
###正文:
MVP 是从经典的模式MVC演变而来，它们的基本**有相通的地方：Controller/Presenter负责逻辑的处理，Model提供数据，View负责显示... ...
理论知识不多讲，我也讲不清楚，请直接查看代码或下载后查看；
###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~~~)
#####step1:bean类：
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;
}
}#####step2：Model:Model里写真正处理信息的操作，比如请求网络，再次以子线程进行模拟。首先写接口类，然后写实现类
//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();
}
}#####step3：View:view是Presenter与View交互接口，写一些方法以便在Activity中处理信息
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();
}#####step4：Presenter:Presenter是用作Model和View之间交互的桥梁，在Activity中拿到Presenter对象后，实现View接口，调用Presenter方法即可
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();
}
}#####step5：Activity: 其实就是View...在new Presenter(this)时，会提示集成View接口，接口中的方法都会在Activity调用Presenter方法时候被调用。
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("");
}
}#####MainActivity布局文件：
<?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>#####step6：下面就可以运行了，正确的用户信息为：
username = "David"
password = "12345"
end
========================
Remember Me
#####@ Name : David
#####@ email ：[email protected]
#####Learn from yesterday, live for today, hope for tomorrow.
###Thanks for you!!!
###Have a nice day !!!
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent