android dagger2 注入错误无法施放

Question

调用 onItemSelected() 方法时出现此错误此错误是什么意思？也许您知道如何修复它？

MainActivity中调用的方法

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

界面

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);
    }

, 主持人 class

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);
}
}

FATAL EXCEPTION: main Process: com.ct.rrapp, PID: 15838 java.lang.ClassCastException: com.ct.rrapp.presentation.side_Effect.SideEffectReportActivity cannot be cast to 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.onItemSelected(AdviceListFragment.java:93) at com.ct.rrapp.presentation.side_Effect.advice_list.common.AdviceListAdapter.lambda$onBindViewHolder(AdviceListAdapter.java:55) at com.ct.rrapp.presentation.side_Effect.advice_list.common.AdviceListAdapter$$Lambda.onClick(Unknown Source) at android.view.View.performClick(View.java:5697) at android.view.View$PerformClick.run(View.java:22526) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7224) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Answer 1

从这一行判断：

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

并且此异常消息：

java.lang.ClassCastException:SideEffectReportActivity cannot be cast to 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 class，this 对象是 this 的实例，不实现 MainRouter界面.

如果 this 对象是 MainActivity 的一个实例，这意味着您的 activity 没有实现 MainRouter.

android dagger2 注入错误无法施放

android dagger2 inject error cannot cast

java

android

dagger-2