Android Apis in Scala

MainActivity.scala

import android.app.Activity
import android.widget.TextView
import android.os.Bundle
import android.provider.ContactsContract
import android.content.ContentResolver
import android.database.Cursor
import android.util.Log

class MainActivity extends Activity {
    override def onCreate(savedState: Bundle) = {
        super.onCreate(savedState)
        val view = new TextView(this)
        view.setText("Reading contacts...")
        setContentView(view)

        read()
    }

    private def read():Unit = {
        val resolver: ContentResolver = getContentResolver

        val cursor: Cursor = resolver.query(ContactsContract.Data.CONTENT_URI,
            null,
            ContactsContract.Data.MIMETYPE + "=?",
            Array(ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE),
            ContactsContract.Data.CONTACT_ID)

        var lineNumber: Long = 0
        while (cursor.moveToNext) {
            val id: Long = cursor.getLong(cursor.getColumnIndex(ContactsContract.Data.CONTACT_ID))
            val name: String = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME))
            val data1: String = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DATA1))
            Log.e("CONTACTS", s"$lineNumber : $id name=$name, data1=$data1")
            lineNumber = lineNumber + 1
        }
    }
}

MainActivityJava.java

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.Log;
import android.widget.TextView;

public class MainActivityJava extends Activity {
    protected void onCreate(Bundle savedState) {
        super.onCreate(savedState);
        TextView view = new TextView(this);
        view.setText("Reading contacts...");
        setContentView(view);

        read();
    }

    private void read() {
        ContentResolver resolver = getContentResolver();

        Cursor cursor = resolver.query(ContactsContract.Data.CONTENT_URI,
                null,
                ContactsContract.Data.MIMETYPE + "=?",
                new String[] {ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE},
                ContactsContract.Data.CONTACT_ID);

        long lineNumber = 0;
        while (cursor.moveToNext()) {
            long id = cursor.getLong(cursor.getColumnIndex(ContactsContract.Data.CONTACT_ID));
            String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
            String data1 = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DATA1));
            Log.e("CONTACTS", lineNumber + " : " + id + " name=" + name + ", data1=" + data1);
            lineNumber = lineNumber + 1;
        }
    }
}