How do I set multiple alarms using a broadcast receiver?

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Java

Android

I have 3 codes for my alarm and I am not sure where I should be putting the code for multiple alarms. Also, I am using Android Studio.

BootReceiver.java

public class BootReceiver extends BroadcastReceiver {

    public final void setAlarm(Context ctxt) {
        AlarmManager mgr = (AlarmManager) ctxt.getSystemService(Context.ALARM_SERVICE);
        Calendar cal = Calendar.getInstance();
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctxt);
        String time = prefs.getString("alarm_time", "12:00");

        cal.set(Calendar.HOUR_OF_DAY,Timer.getHour(time));
        cal.set(Calendar.MINUTE, Timer.getMinute(time));
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        
        if (cal.getTimeInMillis() < System.currentTimeMillis()) {
            cal.add(Calendar.DAY_OF_YEAR, 1);
        }

        mgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),AlarmManager.INTERVAL_DAY, getPendingIntent(ctxt));
    }

    public static void cancelAlarm(Context ctxt) {
        AlarmManager mgr = (AlarmManager) ctxt.getSystemService(Context.ALARM_SERVICE);
        mgr.cancel(getPendingIntent(ctxt));
    }

    private static PendingIntent getPendingIntent(Context ctxt) {
        Intent i = new Intent(ctxt, AlarmReceiver.class);
        return(PendingIntent.getBroadcast(ctxt, 0,i, 0));
    }

    @Override
    public void onReceive(Context ctxt, Intent intent) {setAlarm(ctxt);}
}

AlarmSettings.java

public class AlarmSettings extends PreferenceActivity {
    private SharedPreferences prefs = null;

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
    }

    public static class MyPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(final Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.options);
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        prefs = PreferenceManager.getDefaultSharedPreferences(this);
        prefs.registerOnSharedPreferenceChangeListener(onChange);
    }

    @Override
    public void onPause() {
        prefs.unregisterOnSharedPreferenceChangeListener(onChange);
        super.onPause();
    }

    SharedPreferences.OnSharedPreferenceChangeListener onChange = new SharedPreferences.OnSharedPreferenceChangeListener() {
        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
            if ("alarm".equals(key)){
                boolean enabled = prefs.getBoolean(key,false);
                int flag = (enabled ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED : PackageManager.COMPONENT_ENABLED_STATE_DISABLED);
                ComponentName component = new ComponentName(AlarmSettings.this, BootReceiver.class);
                getPackageManager().setComponentEnabledSetting(component, flag, PackageManager.DONT_KILL_APP);

                if (enabled) {
                    BootReceiver.setAlarm(AlarmSettings.this);
                } else {
                    BootReceiver.cancelAlarm(AlarmSettings.this);
                }
            } else if ("alarm_time".equals(key)){
                BootReceiver.cancelAlarm(AlarmSettings.this);
                BootReceiver.setAlarm(AlarmSettings.this);
            }
        }
    };}

AlarmReceiver.java

public class AlarmReceiver extends BroadcastReceiver {
    private static final int NOTIFY_ME_ID = 1337;

    @Override
    public void onReceive(Context ctxt, Intent intent){
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctxt);
        boolean useNotification = prefs.getBoolean("use_notification", true);
        if (useNotification) {
            NotificationManager mgr = (NotificationManager) ctxt.getSystemService(Context.NOTIFICATION_SERVICE);
            PendingIntent i = PendingIntent.getActivity(ctxt, 0, new Intent(ctxt, AlarmActivity.class), 0);
            Notification note = new Notification.Builder(ctxt).setContentTitle("AniTime").setContentText("Episode has been released!"). setSmallIcon(android.R.drawable.stat_notify_chat).setContentIntent(i).setAutoCancel(true).build();
            note.flags |= Notification.FLAG_AUTO_CANCEL;
            mgr.notify(NOTIFY_ME_ID, note);
        } else {
            Intent i = new Intent(ctxt, AlarmActivity.class);
            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            ctxt.startActivity(i);
        }
    }
}

What I have tried:

I have tried various methods from stack overflow and this website but they don't seem to suit the code I currently have.