我有一个关于将多个片段注入(inject) Activity 字段的问题。目前,我已经进行了这样的设置(所有片段都扩展了DaggerFragment并且 Activity 是DaggerAppCompatActivity):
@Inject
lateinit var fragmentOne: FragmentOne
@Inject
lateinit var fragmentTwo: FragmentTwo
@Inject
lateinit var fragmentThree: FragmentThree
override fun onCreate(...) {
...
startFirstFragment()
}
fun startFirstFragment() {
supportFragmentManager.beginTransaction()
.replace(containerId, fragmentOne).commit()
}
fun startSecondFragment() {
supportFragmentManager.beginTransaction()
.replace(containerId, fragmentTwo).commit()
}
一切正常,直到我添加LeakCanary,它说,当我用第二个替换第一个片段时,被替换的实例通过
lateinit var fragmentOne
泄漏,因为它保留了对第一个片段的引用。我的问题是:什么时候 Dagger 会清空字段,它是正确执行的,并且应该归咎于谁: Dagger 会导致泄漏,LeakCanary会导致误报泄漏检测或其他?ApplicationComponent:
@ApplicationScoped
@Component(
modules = [
AndroidSupportInjectionModule::class,
ActivityBindingModule::class,
ApplicationModule::class,
RepositoriesModule::class,
NetworkModule::class]
)
interface ApplicationComponent : AndroidInjector<MyApp> {
override fun inject(instance: MyApp?)
@Component.Builder
interface Builder {
@BindsInstance
fun application(application: Application): Builder
fun build(): ApplicationComponent
}
}
ActivityBindingModule:
@Module
abstract class ActivityBindingModule {
...
@ActivityScoped
@ContributesAndroidInjector(modules = [ActivityInQuestionModule::class])
internal abstract fun aiqActivity(): ActivityInQuestion
@ActivityScoped
@Binds
internal abstract fun fragmentSwitcher(activityInQuestion: ActivityInquestion): FragmentSwitcher
}
ActivityInQuestionModule:
@Module
abstract class ActivityInQuestionModule {
@FragmentScoped
@ContributesAndroidInjector
internal abstract fun fragmentOne(): FragmentOne
@FragmentScoped
@ContributesAndroidInjector
internal abstract fun fragmentTwo(): FragmentTwo
@FragmentScoped
@ContributesAndroidInjector
internal abstract fun fragmentThree(): FragmentThree
}
最佳答案
我很确定 Dagger 不是泄漏的原因(如果存在的话)。 Dagger 所做的只是用适当的实例实例化 Activity 的成员。因此,您可以尝试使用修改如下的代码来运行LeakCarnary:lateinit var fragmentOne = FragmentOne() ...
并验证是否存在内存泄漏。也许问题出在您的片段代码中。