Kotlin is it possible to start an activity from a class?

Question

I am new to kotlin, i am creating a framework to handle all my api call, the problem is that it doesn't have context. I would like to start an activity when i receive a certaine call of the api but i have no activity so i can't Intent. What i have tried :

val intent = Intent(this, testActivity::class.java)
startActivity(intent)

But it's that that i need context. I also tried to create a global Class Application with a companion object context but i get an error Required Context found Intent.

val intent = Intent(App.context, testActivity::class.java)
startActivity(intent)

Is there a way to start an activity in a class ? or what should i do ?

Does this answer your question? [How can I start an Activity from a non-Activity class?](https://stackoverflow.com/questions/4298225/how-can-i-start-an-activity-from-a-non-activity-class) — a_local_nobody, Feb 21 '20 at 11:18
OK i ll try it but is it a good practice to pass context? because it's doesn't seem safe and i might have leaks ? — XCarb, Feb 21 '20 at 11:19
passing context is fine as long as you don't keep a static instance of it — a_local_nobody, Feb 21 '20 at 11:20

score 1 · Answer 1 · answered Feb 21 '20 at 11:24

1

Create Application class and create instance.

@Synchronized
        fun getInstance(): MyApplication ? {
            return mInstance
    }

Initialize in Application's onCreate() method

override fun onCreate() {
        super.onCreate()
        mInstance = this
    }

Now use instance as your context in your whole app

MyApplication.getInstance()

answered Feb 21 '20 at 11:24

Komal

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Why is getInstance method Syncronized? – Andrea Nisticò Feb 21 '20 at 17:48

score 0 · Answer 2 · answered Feb 21 '20 at 11:50

0

From your activity, pass applicationContext as a parameter to your API class when creating an instance of the API class. You can do this via constructor injection. You can then use the received applicationContext to start activities and services

answered Feb 21 '20 at 11:50

Rafsanjani

4,352
1
14
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Kotlin is it possible to start an activity from a class?

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