Android MVP Learning

MVP-Model View Presenter

Martinfowler's article divides the MVP into Supervisingpresenter and Passiveview

Examples of MVP in Android: HTTPS://GITHUB.COM/ANTONIOLG/ANDROIDMVP

First look at the structure of the project

It can be seen that each function module contains Xxactivity,xxview (Interface), Xxpresenter (Interface), Xxpresenterimp

LoginView interface, responsible for logical processing

Public interface LoginView {public    void showprogress ();    public void hideprogress ();    public void Setusernameerror ();    public void Setpassworderror ();    public void Navigatetohome ();}

Loginpresenter interface

Public interface Loginpresenter {public    void Validatecredentials (string username, string password);}

Loginactivity, implements the LoginView interface, implements the corresponding method, contains a presenter as a member variable, PRESENTERIMP call the response method for UI update and synchronization

public class Loginactivity extends Activity implements LoginView, View.onclicklistener {private ProgressBar PROGRESSBA    R    Private EditText username;    private EditText password;    Private Loginpresenter presenter;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_login);        ProgressBar = (ProgressBar) Findviewbyid (r.id.progress);        Username = (EditText) Findviewbyid (r.id.username);        Password = (EditText) Findviewbyid (R.id.password);        Findviewbyid (R.id.button). Setonclicklistener (this);    Presenter = new Loginpresenterimpl (this);    } @Override public void ShowProgress () {progressbar.setvisibility (view.visible);    } @Override public void Hideprogress () {progressbar.setvisibility (view.gone);    } @Override public void Setusernameerror () {Username.seterror (getString (r.string.username_error)); } @Override public voidSetpassworderror () {Password.seterror (getString (r.string.password_error));        } @Override public void Navigatetohome () {startactivity (new Intent (this, mainactivity.class));    Finish (); } @Override public void OnClick (View v) {presenter.validatecredentials (Username.gettext (). toString (), password.    GetText (). toString ()); }}

Loginpresenterimp, it realizes the Loginpresenter

Ublic class Loginpresenterimpl implements Loginpresenter, Onloginfinishedlistener {    private LoginView LoginView;    Private Logininteractor Logininteractor;    Public Loginpresenterimpl (LoginView LoginView) {        this.loginview = LoginView;        This.logininteractor = new Logininteractorimpl ();    }    @Override public void Validatecredentials (string username, string password) {        loginview.showprogress ();        Logininteractor.login (username, password, this);    }    @Override public void Onusernameerror () {        loginview.setusernameerror ();        Loginview.hideprogress ();    }    @Override public void Onpassworderror () {        loginview.setpassworderror ();        Loginview.hideprogress ();    }    @Override public void onsuccess () {        loginview.navigatetohome ();    }}

The entire project architecture separates logical processing and UI synchronization updates from activity, and the code is more concise

For the MVP is not too understanding, but also need to see more examples Ah

About the MVP improvements: Blogs

Android MVP Learning