java.lang.IllegalStateException: KoinApplication has not been started - kotlin

Question

I am learning kotlin using koin. While running the application in catlog I see the following message.
java.lang.IllegalStateException: KoinApplication has not been started
though I have used startKoin in MyApplication
class MyApplication : Application() {
var listOfModules = module {
single { GitHubServiceApi() }
}
override fun onCreate() {
super.onCreate()
startKoin {
androidLogger()
androidContext(this#MyApplication)
modules(listOfModules)
}
}
}

Answer 1

Adding "android:name=".TheApplication" in the Manifest file solved the issue.
android:name=".TheApplication"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_app_icon_round"
android:supportsRtl="true"
android:theme="#style/Theme.Shrine">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
"android:name=".TheApplication" is the Class Name from Koin
class TheApplication : Application() {
override fun onCreate() {
super.onCreate()
if (BuildConfig.DEBUG) {
Timber.plant(Timber.DebugTree())
}
startKoin {
androidLogger()
androidContext(androidContext = this#TheApplication)
modules(
listOfModules
)
}
}
}

Answer 2

In you manifest.xml,
<application>
android:name=".MyApplication"
...
</application
Add this line in application tag.

Answer 3

Basically, you need to give the name of the class where you called startKoin() method, in the Manifest as an application name. And this will let your configure logging, properties loading and modules. Check this out: https://doc.insert-koin.io/#/koin-core/dsl

Answer 4

If you write unit test, you also should add startKoin and inject dependencies:
#Before
fun startKoinForTest() {
startKoin {
modules(DI.modules(...))
}
}
#After
fun stopKoinAfterTest() = stopKoin()
See also Koin Android Test.

Answer 5

private fun getKoin(activity: ComponentActivity): Koin {
return if (activity is KoinComponent) {
activity.getKoin()
} else {
GlobalContext.getOrNull() ?: startKoin {
androidContext(activity)
modules(listModule)
}.koin
}
}
fun ComponentActivity.contextAwareActivityScope() = runCatching {
LifecycleScopeDelegate<Activity>(
lifecycleOwner = this,
koin = getKoin(this)
)}.getOrElse { activityScope()
}