51.6 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:

public static boolean isIntentAvailable(Context context, String action) {

    final PackageManager packageManager = context.getPackageManager();

    final Intent intent = new Intent(action);

    List<ResolveInfo> list =

            packageManager.queryIntentActivities(intent,

                 ...