MVP简单的实现登录

来源：互联网发布：ubuntu 16.04 重装编辑：程序博客网时间：2024/06/05 03:27

//首先写一个封装的User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;    }}

//定义一个Model的接口

public interface Imodel {    /**     * 登录     *     * @param user     * @return 约定返回"true"为登录成功，其他为登录失败的错误信息     */    String login(User user);}

//定义一个VIew的接口

public interface Iview {    /**     * 登录成功     */    void onLoginSuccess();    /**     * 登录失败     *     * @param error     */    void onLoginFailed(String error);}

//用Model类来实现接口

public class UserModel implements  Imodel {    @Override    public String login(User user) {        boolean networkError = false; //网络是否异常        try {            Thread.sleep(2000);//模拟网络连接            if (networkError) {                return "网络异常";            } else if ("zhangchaofei".equals(user.getUsername()) && "123456".equals(user.getPassword())) {                return "true";            } else {                return "账号或密码错误";            }        } catch (InterruptedException e) {            e.printStackTrace();            return e.getMessage();        }}}
//定义一个Presenter类进行M和V交互

public class UserPresenter {    private final Iview iview;    private final UserModel userModel;    public UserPresenter(Iview iview) {        this.iview=iview;        this.userModel=new UserModel();    }    /**     * 登录     *     * @param user     */    public void login(final User user) {        new Thread() {            @Override            public void run() {                final String res = userModel.login(user);                new Handler(Looper.getMainLooper()).post(new Runnable() {                    @Override                    public void run() {                        if ("true".equals(res)) {                            iview.onLoginSuccess();                        } else {                            iview.onLoginFailed(res);                        }                    }                });            }        }.start();    }}

//最后在MainAvtivity实现

public class MainActivity extends AppCompatActivity implements Iview{    private UserPresenter userPresenter;    private EditText etUserName;    private EditText etPassword;    private ProgressDialog loginProgreess;    private Button login;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        etUserName= (EditText) findViewById(R.id.editText);        etPassword= (EditText) findViewById(R.id.editText2);        login= (Button) findViewById(R.id.button);        userPresenter=new UserPresenter(this);        login.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                String username = etUserName.getText().toString().trim();                String password = etPassword.getText().toString().trim();                if (TextUtils.isEmpty(username) || TextUtils.isEmpty(password)) {                    Toast.makeText(getApplicationContext(), "账号或密码不能为空", Toast.LENGTH_SHORT).show();                    return;                }                loginProgreess = ProgressDialog.show(MainActivity.this, "登录", "正在登录...");                userPresenter.login(new User(username, password));            }        });    }    @Override    public void onLoginSuccess() {        loginProgreess.dismiss();        Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_SHORT).show();    }    @Override    public void onLoginFailed(String error) {        loginProgreess.dismiss();        Toast.makeText(getApplicationContext(), "登录失败:" + error, Toast.LENGTH_SHORT).show();    }}

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