Tutorial 6

Use device actions safely.

A catalogue becomes useful when users can call, open maps, or share. Prefer external intents when another app already owns the job.

Action map

CallOpen dialer with a phone number. Avoid direct call permission unless required.

MapOpen location in a maps app using a geo or search URI.

ShareUse system share sheet for business name, phone, and address.

Open dialer

fun openDialer(context: Context, phone: String) {
    val intent = Intent(
        Intent.ACTION_DIAL,
        Uri.parse("tel:$phone")
    )
    context.startActivity(intent)
}

ACTION_DIAL opens the dialer and lets the user decide. That is safer than making the call directly.

Practice task

Add Call, Map, and Share buttons to the detail screen.
Disable Call when phone is missing.
Test the action on emulator and real device if possible.
Document which actions need permissions and which do not.

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