Question

调用onItemSelected（）方法时出现此错误，这个错误意味着什么？也许您有任何想法如何解决？

在MainActivity中调用的方法

@Override
public void onAdviceBodyItemSelected(Advice advice) {
    SideEffectReportActivity.start(this, advice);
}

接口

public interface MainRouter extends BodyRouter {

void onAdviceBodyItemSelected(Advice advice);

   }

，片段

@Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        MainActivity activity = (MainActivity) getActivity();

        getPresenter().setRouter(activity);
        mAdvicePresenter.getList(mBody);
        activity.resolveToolbar(this);
    }

，演示者课程

public class AdviceListPresenter extends BasePresenter<AdviceListView,` 

    MainRouter> {

    private static final String TAG = "advicelistpresenter";
    private



final GetSideEffectListByCategoryInteractor mGetSideEffectListInteractor;

@Inject
AdviceListPresenter(GetSideEffectListByCategoryInteractor getSideEffectListInteractor) {
    mGetSideEffectListInteractor = getSideEffectListInteractor;
}

@Override public void onStart() {

}

@Override public void onStop() {
    mGetSideEffectListInteractor.unsubscribe();
}


void getList(Body body) {
    getView().onStartLoading();
    mGetSideEffectListInteractor.execute(body.name(), new Subscriber<List<Advice>>() {
        @Override public void onCompleted() {

        }

        @Override public void onError(Throwable e) {
            getView().onLoaded();
        }

        @Override public void onNext(List<Advice> groups) {
            getView().onLoaded();

            System.out.println("----------------------------------------------------------qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq--------------------------------: ");
            getView().updateAList(groups);
        }
    });
}


void onItemSelected(Advice advice) {
  // getRouter().openSideEffect(advice);
    //getRouter().onAdviceItemSelected(advice);
   // Log.e(TAG," ADVICE :" + advice.bodypartProblemsGroup);

    Log.e(TAG,"router :" + getRouter());
    getRouter().onAdviceBodyItemSelected(advice);
}
void onGItemSelected(AdviceGroup adviceGroup) {
    // getRouter().openSideEffect(advice);
    //getRouter().onAdviceItemSelected(advice);
   // Log.e(TAG," ADVICE :" + advice.bodypartProblemsGroup);
}
}

致命的例外：主要处理：com.ct.rrapp，PID：15838 java.lang.ClassCastException：com.ct.rrapp.presentation.side_Effect.SideEffectReportActivity无法强制转换为nl.creativeict.radiotherapp.presentation.main.MainRouter at com.ct.rrapp.presentation.side_Effect.advice_list.AdviceListPresenter.onItemSelected（AdviceListPresenter.java:80） at com.ct.rrapp.presentation.side_Effect.advice_list.AdviceListFragment $ 1.onItemSelected（AdviceListFragment.java:93）在com.ct.rrapp.presentation.side_Effect.advice_list.common.AdviceListAdapter.lambda $ onBindViewHolder $ 1（AdviceListAdapter.java:55） at com.ct.rrapp.presentation.side_Effect.advice_list.common.AdviceListAdapter $$ Lambda $ 4.onClick（Unknown Source）在android.view.View.performClick（View.java:5697）在android.view.View $ PerformClick.run（View.java:22526）在android.os.Handler.handleCallback（Handler.java:739）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:158）在android.app.ActivityThread.main（ActivityThread.java:7224） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1230）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1120）

Answer 1

从这条线来判断：

@Override
public void onAdviceBodyItemSelected(Advice advice) {
    SideEffectReportActivity.start(this, advice);
}

此异常消息：

java.lang.ClassCastException：SideEffectReportActivity无法强制转换为MainRouter

可以得出结论，静态方法SideEffectReportActivity#start(*, Advice)期望MainRouter作为第一个参数，而this对象是实例的类不实现MainRouter接口。

如果this对象是MainActivity的实例，则表示您的活动未实现MainRouter。

android dagger2注入错误无法投射

1 个答案: