MVP4G主持人沒有設置

我有一個問題，我用mvp4g框架開發了一個應用程序。我有一個選項卡的視圖，其中一個選項卡是帶有選項卡的第二個視圖。當我嘗試從第二個視圖調用演示者時，我得到NPE（演示者爲空）。這裏是第一視圖代碼：MVP4G主持人沒有設置

public interface ICategoriesView extends IsWidget { 

    public interface ICategoriesPresenter { 
    } 
} 

@Presenter(view = CategoriesView.class) 
public final class CategoriesPresenter extends BasePresenter<ICategoriesView, UserEventBus> implements ICategoriesPresenter { 
} 

public final class CategoriesView extends ReverseCompositeView<ICategoriesPresenter> implements ICategoriesView { 

    interface CategoriesViewUiBinder extends UiBinder<Widget, CategoriesView> { 
    } 

    private static final CategoriesViewUiBinder UI_BINDER = GWT.create(CategoriesViewUiBinder.class); 

    public CategoriesView() { 
     initWidget(UI_BINDER.createAndBindUi(this)); 
    } 
} 


<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder' 
      xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container" 
      xmlns:gxtClient="urn:import:com.sencha.gxt.widget.core.client" 
      xmlns:category="urn:import:app.client.ui.settings.categories"> 

    <ui:with type="app.client.Messages"    field="messages"/> 
    <ui:with type="app.client.resource.image.Image" field="imageUser"/> 

    <!-- Tab configuration. --> 
    <ui:with type="com.sencha.gxt.widget.core.client.TabItemConfig" field="subjectTypes"> 
     <ui:attributes text="{messages.categories_tab_subjectTypes}" /> 
    </ui:with> 
    <ui:with type="com.sencha.gxt.widget.core.client.TabItemConfig" field="subjectRegions"> 
     <ui:attributes text="{messages.categories_tab_subjectRegions}" /> 
    </ui:with> 
    <ui:with type="com.sencha.gxt.widget.core.client.TabItemConfig" field="tripTypes"> 
     <ui:attributes text="{messages.categories_tab_tripTypes}" /> 
    </ui:with> 
    <ui:with type="com.sencha.gxt.widget.core.client.TabItemConfig" field="expenseTypes"> 
     <ui:attributes text="{messages.categories_tab_expenseTypes}" /> 
    </ui:with> 
    <ui:with type="com.sencha.gxt.widget.core.client.TabItemConfig" field="expensePaymentTypes"> 
     <ui:attributes text="{messages.categories_tab_expensePaymentTypes}" /> 
    </ui:with> 

    <container:SimpleContainer> 
     <gxtClient:TabPanel addStyleNames="margin-10"> 
      <gxtClient:child config="{subjectTypes}"> 
       <category:CategoryView category="ONE" /> 
      </gxtClient:child> 

      <gxtClient:child config="{subjectRegions}"> 
       <category:CategoryView category="TWO" /> 
      </gxtClient:child> 

      <gxtClient:child config="{tripTypes}"> 
       <category:CategoryView category="THREE" /> 
      </gxtClient:child> 

      <gxtClient:child config="{expenseTypes}"> 
       <category:CategoryView category="FOUR" /> 
      </gxtClient:child> 

      <gxtClient:child config="{expensePaymentTypes}"> 
       <category:CategoryView category="FIVE" /> 
      </gxtClient:child> 
     </gxtClient:TabPanel> 
    </container:SimpleContainer> 

</ui:UiBinder>

這裏是第二視圖代碼：

public interface ICategoryView extends IsWidget, Editor<CategoryDTO> { 

    public interface ICategoryPresenter { 

     public void getCategory(CategoryList category); 
    } 

    public void setCategory(String category); 

    public void setGridContent(List<CategoryDTO> categoryDTOList); 

    void showFailedMessage(); 
} 


@Presenter(view = CategoryView.class) 
public final class CategoryPresenter extends BasePresenter<ICategoryView, UserEventBus> implements ICategoryPresenter { 

    @Inject 
    private CategoryServiceAsync categoryServiceAsync; 

    public void getCategory(CategoryList category) { 
     ... 
    } 
} 

public final class CategoryView extends ReverseCompositeView<ICategoryPresenter> implements ICategoryView { 

    interface CategoryViewUiBinder extends UiBinder<Widget, CategoryView> { 
    } 

    interface CategoryDriver extends SimpleBeanEditorDriver<CategoryDTO, CategoryView> { 
    } 

    private static final CategoryViewUiBinder UI_BINDER = GWT.create(CategoryViewUiBinder.class); 

    public CategoryView() { 
     initWidget(UI_BINDER.createAndBindUi(this)); 
    } 

    public void setCategory(String category) { 
     List<CategoryDTO> categoryDTOList = Collections.emptyList(); 
     presenter.getCategory(CategoryList.valueOf(category)); // PRESENTER IS NULL!!! 
    } 

    public void setGridContent(List<CategoryDTO> categoryDTOList) { 
    } 

    @Override 
    public void showFailedMessage() { 
    } 
}

來源

2012-06-08 user1289877

你對你有沒有主持人的任何onGoTo方法？你可以展示你的活動巴士嗎？並嘗試編譯您的代碼並在此處複製堆棧跟蹤。

來源

2014-03-15 13:51:33

MVP4G主持人沒有設置

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