Android 用于加载 UI 模型 class 具有 android 资源的 MVP 架构标准

Question

我在我的应用程序中遵循 MVP 架构。我的 HomeActivity 包含一个带有列表图标的滑动面板，该列表图标具有选择器，在选择滑动面板项目时图标状态会更改，我没有使用任何列表选择器。

I am keeping a model class NavItemData for populating the navigation drawer and using a class SlidingPanelItemSelector that extends StateListDrawable generates the appropriate selector for the sliding panel icon.

在 MVP 架构中，我们有一个演示器 class，它与模型通信并为视图生成输入。在我的例子中，如果我使用演示者获取滑动面板的数据，我从演示者那里调用 class，使用 android context 是一个很好的方法，或 我们是否有任何严格遵循 MVP 架构的替代解决方案？

Currently i am using a ViewBinderUtils class and injected it directly to the activity class and gets the list of data for Sliding Panel. Is it following Mvp Architcture?

SlidingPanelItemSelector.class

public class SlidingPanelItemSelector extends StateListDrawable {
    private Context mContext;

    public SlidingPanelItemSelector(Context mContext){
        this.mContext = mContext;
    }

    public StateListDrawable getHomeSelector(){
    StateListDrawable stateListDrawable = new StateListDrawable();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            stateListDrawable.addState(new int[]{android.R.attr.state_pressed},
                mContext.getDrawable(R.drawable.ic_nav_home_active));
            stateListDrawable.addState(new int[]{},mContext.getDrawable(R.drawable.ic_nav_home));
        }else{
            stateListDrawable.addState(new int[]{android.R.attr.state_pressed},
                mContext.getResources().getDrawable(R.drawable.ic_nav_home_active));
            stateListDrawable.addState(new int[]{},mContext.getResources().getDrawable(R.drawable.ic_nav_home));
        }

        return stateListDrawable;
    }
}

ViewBinderUtils.class

public class ViewDataBinderUtils {
    Context mContext;
    @Inject
    public ViewDataBinderUtils(@ActivityContext Context mContext) {
        this.mContext = mContext;
    }
    public List<SlidingPanelData> getListData(String [] titles){
        List<SlidingPanelData> items = new ArrayList<>();
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getHomeSelector(),titles[0],true));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getConfigurationSelector(),titles[1],false    ));
    items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getConfigurationSelector(),titles[2],false));
        items.add(new SlidingPanelData(true));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getQuoteSelector(),titles[3],false));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getEquipmentInventorySelector(),titles[4],false));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getCustomerSelector(),titles[5],false));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getQuoterSelector(),titles[6],false));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getSalesProgramsSelector(),titles[7],false));
        items.add(new SlidingPanelData( new SlidingPanelItemSelector(mContext).getCreditAppsSelector(),titles[8],false));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getRetailOffersSelector(),titles[9],false));
        items.add(new SlidingPanelData(true));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getPayOffersSelector(),titles[10],true));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getAlertsSelector(),titles[11],true));
        items.add(new SlidingPanelData(true));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getTermofUseSelector(),titles[12],false));
        items.add(new SlidingPanelData(new SlidingPanelItemSelector(mContext).getLegalInfoSelector(),titles[11],false));
        return items;
    }
}

Answer 1

演示者应该与上下文内容隔离，因为唯一应该知道上下文的部分是 View(V) 部分。我不太理解你的这个 classes 的目标，但在一般情况下你应该遵循这个逻辑

if am using the presenter for getting the data for Sliding Panel i am calling a class from presenter that using android context

创建一个接口，负责管理 View (V) 与 Presenter (P) 之间的通信。

Communication.java

public interface Communication {
    void showLoading();
    void hideLoading();
    void setSlidingData(String [] titles);
}

您的视图应实现此接口 Comunication，并为 Presenter 提供参考。如果你需要使用 Interactor (I) 的上下文，你应该有一个 class 来管理它（在我的例子中是 RequestHolder).

View.java

public View implements Communication{
    private Presenter mPresenter;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
           // your view already implements the Comunication interface
           mPresenter = new Presenter(this);
        }
        (...)
       private void getData(){
         mPresenter.getData(new RequestHolder(getApplicationContext()));
       }

       @Override
       public void setSlidingData(String [] titles){
          List<SlidingPanelData> items = new ArrayList<>();
          items.add(new SlidingPanelData(new SlidingPanelItemSelector(getApplicationContext()).getHomeSelector(),titles[0],true));
       }
    }

演示者中有您的界面参考

Presenter.java

private Communication mView;

public Presenter(Communication view) {
    mView = view;
}

/** event to receive data from the model **/
public void onEvent(GetDataMessage event){
   mView.setSlidingData(event.getData());
} 

public void getData(final RequestHolder holder){
   new GetDataInteractor(holder);
}

RequestHolder.java

// you can put the data important to the interactor
public RequestHolder(final Context context, int accountId) {
    super(context); 
}
//getters and setters

有了这个，您可以访问交互器内部的上下文，而无需混合概念

总之，

视图是唯一提供上下文的视图
View 引用了 Presenter
Presenter "talks" with View between Interface

在您的具体情况下，为什么不创建需要视图部分上下文的列表并填充列表项 = new ArrayList<>();在你的主持人部分？这样你就可以把所有东西都隔离开来

Android 用于加载 UI 模型 class 具有 android 资源的 MVP 架构标准

Android MVP architecture standard for loading UI with Model class having android resource

android

android-layout

navigation-drawer

mvp

android-selector