請求依賴項時方法注入dagger2空異常

Question

嗨，我正在嘗試使用匕首2的方法注入，並在使用注入的依賴項時獲取空指針異常，我嘗試刪除@provide批注並在此處的單獨模塊中提取DialogManger

@Module

公共類DialogManagerModule {

Context context;

public DialogManagerModule(Context context){
    this.context = context;
}

@Provides
DialogManager provideDialogManager(Context context){
    return new DialogManager(context);
}

@Provides
ProgressDialogInteractor provideProgressDialogInteractor(){
    return new ProgressDialog();
}

@Provides
Context provideContext(){
    return context;
}

}

public class DialogManager {

Context context;

ProgressDialogInteractor progressDialog;

@Inject
public void setProgressDialog(ProgressDialogInteractor progressDialog) {
    this.progressDialog = progressDialog;
}

public DialogManager(Context context) {
    this.context = context;
}

public void showDatePickerDialog(DatePickerDialog.OnDateSetListener listener){
    Calendar calendar = Calendar.getInstance();
     new DatePickerDialog(
            context
             , listener
             , calendar.get(Calendar.YEAR)
             , calendar.get(Calendar.MONTH)
             , calendar.get(Calendar.DAY_OF_MONTH))
             .show();
}

public void showProgressDialog(@Nullable String progressText){

    progressDialog
           /* .setText(progressText)
            .showText()*/
            .show();

}

}

這里是我如何稱呼組件

component =((App) getActivity().getApplication()).getComponent()
            .newPersonalInfoFragmentComponent(new PersonalInfoFragmentModule(this), new DialogManagerModule(getContext()));

Answer 1

您應該像在ContextModule類中那樣提供上下文，並且必須提供在Provide方法中使用的所有對象。

@Singleton
@Module
public abstract class ContextModule {

    @Binds
    abstract Context provideContext(Application application);
}