59.6 Checking Intent Availability

It is generally unwise to assume that an activity will be available for a particular intent, especially since the absence of a matching action will typically result in the application crashing. Fortunately, it is possible to identify the availability of an activity for a specific intent before it is sent to the runtime system. The following method can be used to identify the availability of an activity for a specified intent action type:

fun isIntentAvailable(context: Context, action: String): Boolean {

    val packageManager = context.packageManager

    val intent = Intent(action)

    val list = packageManager.queryIntentActivities(intent,

            PackageManager.MATCH_DEFAULT_ONLY)

    return list.size > 0

}