Android MVP架构标准,用于使用具有android资源的Model类加载UI

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,其中包含选择器,选择滑动面板项目时图标状态已更改,我没有使用任何列表选择器.

我保留了一个模型类NavItemData,用于填充导航抽屉,并使用扩展StateListDrawable 的类SlidingPanelItemSelector为滑动面板图标生成适当的选择器.

在MVP架构中,我们有一个演示者类,它与模型通信并生成视图的输入.在我的情况下,如果我使用演示者获取滑动面板的数据我正在调用使用Android上下文的演示者的类是一个很好的方法,或者我们有任何替代解决方案,严格遵循MVP架构？

目前我正在使用ViewBinderUtils类并将其直接注入活动类并获取Sliding Panel的数据列表.它是否遵循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隔离，因为唯一应该了解上下文的部分是视图( V) 部分。我不太明白你在这门课上的目标，但一般来说你应该遵循这个逻辑

如果我使用演示者获取滑动面板的数据，我将从使用 android 上下文的演示者调用一个类

创建一个接口，负责管理View（V）与Presenter（P）之间的通信。

通信.java

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

你的View应该实现这个接口Communication，并且有Presenter的引用。如果您需要使用Interactor (I)的上下文，您应该有一个类来管理它（在我的例子中为RequestHolder）。

视图.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

演示者.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

这样您就可以访问交互器内部的上下文，而无需混合概念

总共，

• 视图是唯一提供上下文的视图
• View 引用了 Presenter
• 演示者与界面之间的视图“对话”

在您的具体情况下，为什么您不创建需要视图部分上下文并填充 List items = new ArrayList<>(); 的列表 在你的演讲者部分？这样你就可以隔离一切