Android开发记录-MVP模式

Android开发记录主要记录一些实用的开发模式，自定义控件视图和一些第三方的引用。也省去记不住的繁琐..

好了！本篇主要为了快速搭建一个MVP案例，实用为主！！至于MVP模式介绍、MVC模式介绍这里就不啰嗦了，有好多大神详细的分析，这里只放个MVP模式工作图啦。

mvp.png

MVP模式的核心思想：

MVP把Activity中的UI逻辑抽象成View接口，把业务逻辑抽象成Presenter接口，Model类还是原来的Model。

接下来

我们以最简单的Splash页跳转到MainActivity为一个例子，以下是代码目录，个人喜好加借鉴，也可以根据model，view，presenter来做区分！

目录.png

第一步

SplashViewInterface

public interface SplashViewInterface {
    void jumpToMainActivity();
}

第二步

SplashPresenter ，做一个简单的2秒跳转

public class SplashPresenter implements SplashInteractor.OnFinishedListener {
    private SplashViewInterface splashViewInterface;
    private SplashInteractor splashInteractor;

    SplashPresenter(SplashViewInterface splashViewInterface, SplashInteractor splashInteractor) {
        this.splashViewInterface = splashViewInterface;
        this.splashInteractor = splashInteractor;
    }

    void onCreate() {
        //延迟两秒跳转
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                if (splashViewInterface != null) {
                    splashViewInterface.jumpToMainActivity();
                }
            }
        }, 2000);
    }

    void onDestroy() {
        splashViewInterface = null;
    }
    
    @Override
    public void onFinished(String callString) {
        if (splashViewInterface != null) {

        }
    }
}

第三步

SplashInteractor

public class SplashInteractor {
    private String TAG = "SplashInteractor";

    interface OnFinishedListener {
        void onFinished(String callString);
    }

    //可做些http请求，返回接口如上

}

第四步

SplashActivity

public class SplashActivity extends AppCompatActivity implements SplashViewInterface {
    private final String TAG = this.getClass().getSimpleName();
    private SplashPresenter presenter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);
        presenter = new SplashPresenter(this, new SplashInteractor());
        presenter.onCreate();
    }

    @Override
    public void jumpToMainActivity() {
        //跳转到主界面
        Intent intent = new Intent(SplashActivity.this, MainActivity.class);
        startActivity(intent);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        presenter.onDestroy();
    }

}

结尾

当你体会到回头查看Activity内代码过长过多，然后发现不用在Activiy里写一堆乱七八糟的逻辑以后，你就会发现它的好处了！