如何得到activity的类名？

 Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
 


        mApps = getPackageManager().queryIntentActivities(mainIntent, 0);
    
ResolveInfo info = mApps.get(position);
            //该应用的包名
            String pkg = info.activityInfo.packageName;
            //应用的主activity类
            String cls = info.activityInfo.name;