Databases
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    <p>You need to copy the database file into your assets folder, then write it to memory to access in the app using the following code:</p> <pre><code>public class DataBaseHelper extends SQLiteOpenHelper{ private static final String TAG = "DataBaseHelper"; //The Android's default system path of your application database. private static String DB_PATH = "/data/data/" + Constants.package_name + "/databases/"; private static String DB_NAME = "YourDatabaseName.db"; public SQLiteDatabase myDataBase; private 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.getWritableDatabase(); 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_READWRITE); }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[2048]; int length; while ((length = myInput.read(buffer))&gt;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_READWRITE); } @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) { } </code></pre> <p>Hope this helps.</p>
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    1. POWhere to place a sqlite file in an android application
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    1. UScoder
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    1. COIn your DataBaseHelper class, you should use `myContext.getDatabasePath("YourDatabaseName")` instead of hard-coding `DB_PATH`.
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      1. USTed Hopp
    2. COi've had code similar to this in a production app for a while and while it seems to work most of the time, I have a suspicion that here and there the database gets slightly corrupted or altered during the copy. I've notice missing columns and corrupt table indices.
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      1. USSam Dozor
    3. COMany thanks for the code, i'll try making some modifications.
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      1. USgiorgiline
 

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