CustomTabsHelper.java 文件源码

/**
 * Used to check whether there is a specialized handler for a given intent.
 * @param intent The intent to check with.
 * @return Whether there is a specialized handler for the given intent.
 */
private static boolean hasSpecializedHandlerIntents(Context context, Intent intent) {
    try {
        PackageManager pm = context.getPackageManager();
        List<ResolveInfo> handlers = pm.queryIntentActivities(
                intent,
                PackageManager.GET_RESOLVED_FILTER);
        if (handlers == null || handlers.size() == 0) {
            return false;
        }
        for (ResolveInfo resolveInfo : handlers) {
            IntentFilter filter = resolveInfo.filter;
            if (filter == null) continue;
            if (filter.countDataAuthorities() == 0 || filter.countDataPaths() == 0) continue;
            if (resolveInfo.activityInfo == null) continue;
            return true;
        }
    } catch (RuntimeException e) {
        Log.e(TAG, "Runtime exception while getting specialized handlers");
    }
    return false;
}