在Android中，可以通过以下代码示例来实现在不清除通知的情况下清除徽章图标：

首先，在AndroidManifest.xml文件中添加以下权限：

然后，创建一个名为BadgeUtils的工具类，其中包含清除徽章图标的方法：

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;

public class BadgeUtils {

    public static void clearBadge(Context context) {
        if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")) {
            clearBadgeXiaomi(context);
        } else if (Build.MANUFACTURER.equalsIgnoreCase("Huawei")) {
            clearBadgeHuawei(context);
        } else if (Build.MANUFACTURER.equalsIgnoreCase("OPPO")) {
            clearBadgeOPPO(context);
        } else if (Build.MANUFACTURER.equalsIgnoreCase("VIVO")) {
            clearBadgeVIVO(context);
        } else {
            // For other devices, try the default method
            clearBadgeDefault(context);
        }
    }

    private static void clearBadgeXiaomi(Context context) {
        try {
            NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            NotificationChannel notificationChannel = new NotificationChannel("badge", "badge", NotificationManager.IMPORTANCE_DEFAULT);
            notificationChannel.setShowBadge(false);
            notificationManager.createNotificationChannel(notificationChannel);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void clearBadgeHuawei(Context context) {
        try {
            Bundle bundle = new Bundle();
            bundle.putString("package", context.getPackageName());
            bundle.putString("class", getLauncherClassName(context));
            bundle.putInt("badgenumber", 0);
            context.getContentResolver().call(Uri.parse("content://com.huawei.android.launcher.settings/badge/"), "change_badge", null, bundle);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void clearBadgeOPPO(Context context) {
        try {
            Intent intent = new Intent("com.oppo.unsettledevent");
            intent.putExtra("packageName", context.getPackageName());
            intent.putExtra("number", 0);
            intent.putExtra("upgradeNumber", 0);
            context.sendBroadcast(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void clearBadgeVIVO(Context context) {
        try {
            Intent intent = new Intent("launcher.action.CHANGE_APPLICATION_NOTIFICATION_NUM");
            intent.putExtra("packageName", context.getPackageName());
            intent.putExtra("className", getLauncherClassName(context));
            intent.putExtra("notificationNum", 0);
            context.sendBroadcast(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void clearBadgeDefault(Context context) {
        try {
            Intent intent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
            intent.putExtra("badge_count", 0);
            intent.putExtra("badge_count_package_name", context.getPackageName());
            intent.putExtra("badge_count_class_name", getLauncherClassName(context));
            context.sendBroadcast(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static String getLauncherClassName(Context context) {
        PackageManager packageManager = context.getPackageManager();
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setPackage(context.getPackageName());
        List resolveInfos = packageManager.queryIntentActivities(intent, 0);
        if (resolveInfos != null && resolveInfos.size() > 0) {
            ResolveInfo resolveInfo = resolveInfos.get(0);
            return resolveInfo.activityInfo.name;
        }
        return "";
    }
}

最后，在需要清除徽章图标的地方调用BadgeUtils.clearBadge(context)方法即可。

请注意，上述代码中包含了对不同厂商设备的处理，因为不同厂商的设备可能具有不同的实现方法。如果你的应用仅支持特定的厂商设备，你可以根据需要调整代码。