public static void sendEmail(Activity activity, String appName, @Nullable Throwable sendEx) {
        String version;
        try {
            version = activity.getPackageManager().getPackageInfo(activity.getPackageName(), 0).versionName;
        } catch (PackageManager.NameNotFoundException ex) {
            version = activity.getString(R.string.unknown);
        }

        Intent intent = new Intent(Intent.ACTION_SEND)
                .setType("message/rfc822")
                .putExtra(Intent.EXTRA_EMAIL, new String[]{activity.getString(R.string.email)})
                .putExtra(Intent.EXTRA_SUBJECT, appName);

        String emailBody = "OS Version: " + System.getProperty("os.version") + "(" + android.os.Build.VERSION.INCREMENTAL + ")" +
                        "\nOS API Level: " + android.os.Build.VERSION.SDK_INT +
                        "\nDevice: " + android.os.Build.DEVICE +
                        "\nModel (and Product): " + android.os.Build.MODEL + " (" + android.os.Build.PRODUCT + ")" +
                        "\nApplication version: " + version +
                        "\n\nProvide bug/feature details";

        if (sendEx != null) {
            emailBody += "\n\n\n";
            emailBody += Logging.getStackTrace(sendEx);
        }

        intent.putExtra(Intent.EXTRA_TEXT, emailBody);

        Logging.LogFile log = Logging.getLatestLogFile(activity, true);
        if (log != null) {
            try {
                intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(Logging.moveLogFileToExternalStorage(activity, log)));
            } catch (ParseException | IOException ignored) {
            }
        }

        try {
            activity.startActivity(Intent.createChooser(intent, "Send mail..."));
        } catch (android.content.ActivityNotFoundException ex) {
            CommonUtils.UIToast(activity, ToastMessage.NO_EMAIL_CLIENT);
        }
    }