Yeah, I effing did it!!!!!!!!!! (Sorry, still pumped from finally getting this to work.)
First off: giving credit where credit is due. Many many many thanks to my sources:
http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/
http://www.mail-archive.com/android-developers@googlegroups.com/msg28194.html
http://www.chriskopec.com/blog/2010/mar/13/deploying-android-apps-with-large-databases/
My project requires a preformed database (SQLite), which in total comes out to a whopping 17mb. Ridiculous I know, but my boss wants it all packaged with the app, and not just to be available online. Hypothetically, getting this to work should be as easy as creating a blank db and then copying the existing one over it from assets or raw. And this totally works-- if your db is smaller than 1mb. So I went and got some free file splitting software (http://www.dekabyte.com/filesplitter/) and split my db file into 1mb pieces. I put the pieces in the raw directory.
I created the DataBaseHelper class and made the necessary tweaks:
public class DataBaseHelper extends SQLiteOpenHelper {
// The Android's default system path of your application database.
private static final String DB_PATH = "/data/data/com.instacare/databases/";
private static final String DB_NAME = "MDAtHand";
private SQLiteDatabase myDataBase;
private final Context myContext;
Resources resources;
/**
* 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;
// super(context, DB_NAME, null, 1);
resources = context.getResources();
}
/**
* 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
copyDataBase();
} 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 {
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();
InputStream databaseInput = null;
// String outFileName = DB_PATH + DbConsts.DATABASE_NAME;
String outFileName = DB_PATH + DB_NAME;
OutputStream databaseOutput = new FileOutputStream(outFileName);
byte[] buffer = new byte[1024];
int length;
databaseInput = resources.openRawResource(R.raw.datafile01);
while ((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile02);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile03);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile04);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile05);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile06);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile07);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile08);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile09);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile10);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile11);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile12);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile13);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile14);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile15);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile16);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseInput = resources.openRawResource(R.raw.datafile17);
while((length = databaseInput.read(buffer)) > 0) {
databaseOutput.write(buffer, 0, length);
databaseOutput.flush();
}
databaseInput.close();
databaseOutput.flush();
databaseOutput.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) {
}
// 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.
}
Then I added this awesomeness to the main.java file
DataBaseHelper myDbHelper = new DataBaseHelper(this);
//myDbHelper = new DataBaseHelper(this);
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
myDbHelper.openDataBase();
}catch(SQLException sqle){
throw sqle;
}
Thats it :)
