code: public static void launchWebBrowser(final Context context, final String url) {
          if (context != null && url != null && !"".equals(url)) {
              final Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
              if (browserIntent.resolveActivity(context.getPackageManager()) != null) {
                  context.startActivity(browserIntent);
              } else {
                  ToastUtils.quickToast(context, "Sorry, Could not open the link. You do not have an application installed to open it.");
                  Log.e("Caffeine", "Failed to open link, because an application is not available to view it.");
              }
          } else {
              ToastUtils.quickToast(context, "Sorry, Could not open link.  No URL provided.");
          }
      }
docs: Start Intent to launch web browser.