Java 未设置MVP4G演示者
我有个问题,我用mvp4g框架开发了一个应用程序。我有一个带选项卡的视图,其中一个选项卡中有第二个带选项卡的视图。当我尝试从第二个视图调用presenter时,我得到NPE presenter为null。 以下是第一视图的代码:Java 未设置MVP4G演示者,java,gwt,mvp4g,Java,Gwt,Mvp4g,我有个问题,我用mvp4g框架开发了一个应用程序。我有一个带选项卡的视图,其中一个选项卡中有第二个带选项卡的视图。当我尝试从第二个视图调用presenter时,我得到NPE presenter为null。 以下是第一视图的代码: public interface ICategoriesView extends IsWidget { public interface ICategoriesPresenter { } } @Presenter(view = CategoriesV
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>
下面是第二个视图的代码:
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() {
}
}
您的演示者中没有任何onGoTo方法? 你能展示一下你的活动巴士吗? 并尝试编译代码并将堆栈跟踪复制到此处