package com.odhranlynch.interiordesigner;
import com.odhranlynch.interiordesigner.R;
import java.io.IOException;
import android.app.Activity;
import android.database.Cursor;
import android.database.SQLException;
import android.os.Bundle;
import android.widget.Toast;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DataBaseHelper myDbHelper = new DataBaseHelper(this);;
myDbHelper = new DataBaseHelper(this);
//Load "productDatabase" database (see assets to left).
{
try {
myDbHelper.createDataBase();}
catch (IOException ioe) {
throw new Error("Unable to create database");}
try {
myDbHelper.openDataBase();}
catch(SQLException sqle){
throw sqle;}
}
//---get all titles---
myDbHelper.openDataBase();
Cursor cursorPosition = myDbHelper.getAllTitles();
if (cursorPosition.moveToFirst())
{
do {
DisplayTitle(cursorPosition);
} while (cursorPosition.moveToNext());
}
myDbHelper.close();
}
public void DisplayTitle(Cursor cursorPosition)
{
Toast.makeText(this,
"id: " + cursorPosition.getString(0) + "\n" +
"TITLE: " + cursorPosition.getString(1) + "\n" +
"CATEGORY: " + cursorPosition.getString(2) + "\n" +
"BODY: " + cursorPosition.getString(3),
Toast.LENGTH_LONG).show();}
}package com.odhranlynch.interiordesigner;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
public class DataBaseHelper extends SQLiteOpenHelper{
//The Android's default system path of your application database.
private static String DB_PATH = "/data/data/com.odhranlynch.interiordesigner/databases/";
private static String DB_NAME = "productDatabase";
public static final String KEY_ROWID = "_id";
public static final String KEY_TITLE = "title";
public static final String KEY_CATEGORY = "category";
public static final String KEY_BODY = "body";
private SQLiteDatabase myDataBase;
final Context myContext;
/**
* Constructor
* Takes and keeps a reference of the passed context in order to access to the application assets and resources.
* @param context
*/
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}
/**
* Creates a empty database on the system and rewrites it with your own database.
* */
public void createDataBase() throws IOException{
boolean dbExist = checkDataBase();
if(dbExist){
//do nothing - database already exist
}else{
//By calling this method and empty database will be created into the default system path
//of your application so we are gonna be able to overwrite that database with our database.
this.getReadableDatabase();
try {
this.close();
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Check if the database already exist to avoid re-copying the file each time you open the application.
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
/**
* Copies your database from your local assets-folder to the just created empty database in the
* system folder, from where it can be accessed and handled.
* This is done by transfering bytestream.
* */
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
//Open the database
String myPath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}
@Override
public synchronized void close() {
if(myDataBase != null)
myDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public Cursor getAllTitles()
{
return myDataBase.query("product", new String[] {
KEY_ROWID,
KEY_TITLE,
KEY_CATEGORY,
KEY_BODY},
null,
null,
null,
null,
null);
}
// Add your public helper methods to access and get content from the database.
// You could return cursors by doing "return myDataBase.query(....)" so it'd be easy
// to you to create adapters for your views.
}
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