如何从Android通讯录中获取名字和姓氏？

import android.Manifest;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_READ_CONTACTS = 100;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS}, REQUEST_READ_CONTACTS);
        } else {
            readContacts();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUEST_READ_CONTACTS) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                readContacts();
            }
        }
    }

    private void readContacts() {
        ContentResolver contentResolver = getContentResolver();
        Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

        if (cursor != null && cursor.moveToFirst()) {
            do {
                String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
                String firstName = "";
                String lastName = "";

                Cursor phoneCursor = contentResolver.query(
                        ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                        null,
                        ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
                        new String[]{cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID))},
                        null);

                if (phoneCursor != null && phoneCursor.moveToFirst()) {
                    do {
                        String phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                        // 这里可以根据需要处理电话号码
                    } while (phoneCursor.moveToNext());
                    phoneCursor.close();
                }

                String[] nameParts = displayName.split(" ");
                if (nameParts.length > 0) {
                    firstName = nameParts[0];
                }
                if (nameParts.length > 1) {
                    lastName = nameParts[nameParts.length - 1];
                }

                System.out.println("First Name: " + firstName);
                System.out.println("Last Name: " + lastName);

            } while (cursor.moveToNext());
            cursor.close();
        }
    }
}