Intents and Navigation

What is an Intent?

An Intent is a message that says “do this”. You use it to open another screen, share text, open a URL, or start a phone call.

Open another screen (explicit intent)

val intent = Intent(this, ProfileActivity::class.java)
intent.putExtra("userId", 42)   // pass data
startActivity(intent)

Read the data on the other screen:

val userId = intent.getIntExtra("userId", 0)

Ask the system to do something (implicit intent)

val web = Intent(Intent.ACTION_VIEW, Uri.parse("https://aimobilecoders.com"))
startActivity(web)

Modern tip: For bigger apps use the Navigation Component or Jetpack Compose navigation instead of manually juggling many activities.