[Unfinished] Class to manage a local SQL database on an android device

DatabaseManager.java

package com.onlocation.tracker;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.*;

import java.util.ArrayList;

//Creates, opens and provides methods to manage a database
public class DatabaseManager {
	public SQLiteDatabase openOrCreateDatabase(Context context, String tableName, String fields) {
		SQLiteDatabase db = context.openOrCreateDatabase("OnlocationLocalDatabase", Context.MODE_PRIVATE, null);
		db.execSQL("CREATE TABLE IF NOT EXISTS " + tableName + " " + fields + ";");

		return db;
	}

	public void insertRow(SQLiteDatabase db, String tableName, String fields, String values) {
		db.execSQL("INSERT INTO " + tableName + " " + fields + " " + "VALUES " + values + ";");
	}

	public void updateRow(SQLiteDatabase db, String tableName, ArrayList<String> fields, ArrayList<String> newValues, String fieldName, String fieldValue) {
		db.execSQL("UPDATE " + tableName + "SET " + createUpdateQuery(fields, newValues) + " WHERE " + fieldName + " = '" + fieldValue + "';" );
	}

	public void removeRow(SQLiteDatabase db, String tableName, String fieldName, String fieldValue) {
		db.execSQL("DELETE FROM " + tableName + " " + "WHERE " + fieldName + " = '" + fieldValue + "';");
	}

	public Integer getRowCount(SQLiteDatabase db, String tableName) {
		Cursor c = db.rawQuery("SELECT COUNT(*) FROM " + tableName + ";", null);

		return c.getCount();
	}

	private String createUpdateQuery(ArrayList<String> fields, ArrayList<String> newValues) {
		String query = null;

		for(int i = 0; i<fields.size(); i++) {
			query += fields.get(i) + "='" + newValues.get(i) + "', ";
		}

		return query;
	}
}