How do I get the latest call logs in Android Studio?

I have a code that works below. But I can't limit it. I just want to get the last 20 call logs. But that's how I see all-time search logs.

It should only be the last call logs and I only need to see 20 pieces. Any help, I'd appreciate it.

My Code;

private void getCallLogs() {

        ContentResolver cr = getBaseContext().getContentResolver();
        Cursor c = cr.query(CallLog.Calls.CONTENT_URI, null, null, null, null);
        int totalCall = 1;
        if (c != null) {
            totalCall = c.getCount();
            if (c.moveToFirst()) {
                for (int j = 0; j < totalCall; j++) {

                    String callDate = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.DATE));
                    String phNumber = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.NUMBER));
                    String callDuration = c.getString(c.getColumnIndexOrThrow(CallLog.Calls.DURATION));
                    Date dateFormat= new Date(Long.valueOf(callDate));
                    String callDayTimes = String.valueOf(dateFormat);
                    String direction = null;

                    switch (Integer.parseInt(c.getString(c.getColumnIndexOrThrow(CallLog.Calls.TYPE)))) {
                        case Telephony.Sms.MESSAGE_TYPE_INBOX:
                            direction = "OUTGOING";
                            break;
                        case Telephony.Sms.MESSAGE_TYPE_SENT:
                            direction = "INGOING";
                            break;
                        case Telephony.Sms.MESSAGE_TYPE_OUTBOX:
                            direction = "MISSED";
                            break;
                        default:
                            break;
                    }

                    Toast.makeText(this, phNumber + direction + callDuration + callDayTimes, Toast.LENGTH_SHORT).show();
                }
            }
            c.close();
        }
    }

Please add this permission in your manifest file.

<uses-permission android:name="android.permission.READ_CALL_LOG"/>

Add this function in your Activity file and call it in oncreate function.

 public void getCallLogs() {            
        int flag=1;
        title.setText(Html.fromHtml("<b>Call Logs</b>"));
        deviceDetails.setText(Html.fromHtml(""));
        StringBuilder callLogs = new StringBuilder();

        ArrayList<String> calllogsBuffer = new ArrayList<String>();
        calllogsBuffer.clear();
        Cursor managedCursor = managedQuery(CallLog.Calls.CONTENT_URI,
                null, null, null, null);
        int number = managedCursor.getColumnIndex(CallLog.Calls.NUMBER);
        int type = managedCursor.getColumnIndex(CallLog.Calls.TYPE);
        int date = managedCursor.getColumnIndex(CallLog.Calls.DATE);
        int duration = managedCursor.getColumnIndex(CallLog.Calls.DURATION);
        while (managedCursor.moveToNext()) {
            String phNumber = managedCursor.getString(number);
            String callType = managedCursor.getString(type);
            String callDate = managedCursor.getString(date);
            Date callDayTime = new Date(Long.valueOf(callDate));
            String callDuration = managedCursor.getString(duration);
            String dir = null;
            int dircode = Integer.parseInt(callType);
            switch (dircode) {
                case CallLog.Calls.OUTGOING_TYPE:
                    dir = "OUTGOING";
                    break;
                case CallLog.Calls.INCOMING_TYPE:
                    dir = "INCOMING";
                    break;
                case CallLog.Calls.MISSED_TYPE:
                    dir = "MISSED";
                    break;
            }
            calllogsBuffer.add("\nPhone Number: " + phNumber + " \nCall Type: "
                    + dir + " \nCall Date: " + callDayTime
                    + " \nCall duration in sec : " + callDuration + "\n");

        }
        managedCursor.close();
}

To call this function, add this to your oncreate function in your Activity.

getCallLogs();