RestaurantHelper.java

package apt.tutorial;

import android.content.Context;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;

class RestaurantHelper extends SQLiteOpenHelper {
	private static final String DATABASE_NAME="lunchlist.db";
	private static final int SCHEMA_VERSION=2;
	
	public RestaurantHelper(Context context) {
		super(context, DATABASE_NAME, null, SCHEMA_VERSION);
	}
	
	@Override
	public void onCreate(SQLiteDatabase db) {
		db.execSQL("CREATE TABLE restaurants (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, address TEXT, type TEXT, notes TEXT, phone TEXT);");
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		if (oldVersion==1 && newVersion==2) {
			db.execSQL("ALTER TABLE restaurants ADD phone TEXT;");
		}
	}

	public Cursor getAll(String where, String orderBy) {
		StringBuilder buf=new StringBuilder("SELECT _id, name, address, type, notes, phone FROM restaurants");
		
		if (where!=null) {
			buf.append(" WHERE ");
			buf.append(where);
		}
		
		if (orderBy!=null) {
			buf.append(" ORDER BY ");
			buf.append(orderBy);
		}
		
		return(getReadableDatabase().rawQuery(buf.toString(), null));
	}
	
	public Cursor getById(String id) {
		String[] args={id};

		return(getReadableDatabase()
						.rawQuery("SELECT _id, name, address, type, notes, phone FROM restaurants WHERE _ID=?",
											args));
	}
	
	public void insert(String name, String address,
										 String type, String notes,
										 String phone) {
		ContentValues cv=new ContentValues();
					
		cv.put("name", name);
		cv.put("address", address);
		cv.put("type", type);
		cv.put("notes", notes);
		cv.put("phone", phone);
		
		getWritableDatabase().insert("restaurants", "name", cv);
	}
	
	public void update(String id, String name, String address,
										 String type, String notes, String phone) {
		ContentValues cv=new ContentValues();
		String[] args={id};
		
		cv.put("name", name);
		cv.put("address", address);
		cv.put("type", type);
		cv.put("notes", notes);
		cv.put("phone", phone);
		
		getWritableDatabase().update("restaurants", cv, "_ID=?",
																 args);
	}
	
	public String getName(Cursor c) {
		return(c.getString(1));
	}
	
	public String getAddress(Cursor c) {
		return(c.getString(2));
	}
	
	public String getType(Cursor c) {
		return(c.getString(3));
	}
	
	public String getNotes(Cursor c) {
		return(c.getString(4));
	}
	
	public String getPhone(Cursor c) {
		return(c.getString(5));
	}
}