Kotlin Android MainApplication class for global applicationContext.

KotlinAndroidMainApplication

// Not object class. AndroidManifest.xml error happen.
class MainApplication : Application() {

    init {
        instance = this
    }

    companion object {
        private var instance: MainApplication? = null

        fun applicationContext() : Context {
            return instance!!.applicationContext
        }
    }

    override fun onCreate() {
        super.onCreate()
        // initialize for any
        
        // Use ApplicationContext.
        // example: SharedPreferences etc...
        val context: Context = MainApplication.applicationContext()
    }
}

thanks

thank u

good !

thanks a lot

Perfect

Thanks a lot

thank you!

Cool, Great Job.

watabout Manifest entry?

You are a live saver :)

PS - The Manifest entry should be:

<application
........
.........
android: name = "pathToYourClass.MainApplication">

how to access it from the activity ?

how to access it from the activity ?

MainApplication.applicationContext() and you must import the class MainApplication to your activity

Goodness gracious! You're the best!

You are a live saver :)

PS - The Manifest entry should be:

<application
........
.........
android: name = "pathToYourClass.MainApplication">

Do I have to do something extra to make it work in my tests? It seems in the unit test, this part fails

fun applicationContext() : Context {
            return instance!!.applicationContext
        }

In particular, instance is null

Is this good to follow in mvvm pattern

What about this (a bit) simpler variant?

class MyApp : Application() {

    init { INSTANCE = this }

    companion object {
        lateinit var INSTANCE: MyApp
            private set

        val applicationContext: Context get() { return INSTANCE.applicationContext }
    }
}

I will test it, seems great @sevar83

Thanks

Thank you

How am I supposed to implement this into my application ? I put it in a simple kotlin class but I get errors.

Pls.. how can I use or implement this.

Thanks!! Love u

hi u coulde use in your manifest
In Manifest
<application
android:name="MainApplication " => Will in red then generate autocomplete

In Fragment

MainApplication .applicationContext().resources