Unable to import existing SQLite database to Android app

Question

I have developed an iPhone app and right now I am working in cloning it for Android. I have used a SQLite database in my iPhone app which has about 1000s of pre-filled rows. Now I want to import this database to Android app. I have already added the database in databases folder in assets. I have checked some tutorials on the net and have done following coding for this:

MainActivity:

public class MainActivity extends ListActivity {
    private Cursor employees;
    private MyDatabase db;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        DataBaseHelper myDbHelper;
        myDbHelper = new DataBaseHelper(this);

        try {

            myDbHelper.createDataBase();

    } catch (SQLException ioe) {

        //throw new Error("Unable to create database");

    }

    try {

        myDbHelper.openDataBase();

    }catch(SQLException sqle){

        throw sqle;

    }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        employees.close();
        db.close();
    }
}

DatabaseHelper

public class DataBaseHelper extends SQLiteOpenHelper{
    //http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/
    //The Androids default system path of your application database.

    private static String DB_PATH = "/data/data/com.example.database/databases";

    private static String DB_NAME = "fit.sqlite";

    private 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() {

        boolean dbExist;
        try {

             dbExist = checkDataBase();


        } catch (SQLiteException e) {

            e.printStackTrace();
            throw new Error("database dose not exist");

        }

        if(dbExist){
        //do nothing - database already exist
        }else{

            try {

                copyDataBase();


            } catch (IOException e) {

                e.printStackTrace();
                throw new Error("Error copying database");

            }
    //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();


    }

    }

    /**
     * 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.
            //throw new Error("database doest 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;
        File databaseFile = new File( DB_PATH);
         // check if databases folder exists, if not create one and its subfolders
        if (!databaseFile.exists()){
            databaseFile.mkdir();
        }

        //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) {

    }
}

But I am getting following error:

05-29 08:34:25.257: E/SQLiteLog(27579): (14) cannot open file at line 30176 of [00bb9c9ce4]
05-29 08:34:25.317: E/SQLiteLog(27579): (14) os_unix.c:30176: (2) open(/data/data/com.example.database/databases/fit.sqlite) - 
05-29 08:34:25.426: E/SQLiteDatabase(27579): Failed to open database '/data/data/com.example.database/databases/fit.sqlite'.
05-29 08:34:25.426: E/SQLiteDatabase(27579): android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
05-29 08:34:25.437: W/System.err(27579): java.io.FileNotFoundException: fit.sqlite
05-29 08:34:25.496: W/System.err(27579):    

Answer 1

Make sure this line have been added to your AndroidManifest.xml file: and never handle the error by try and catch and avoid putting anything into body of catch at least put this If you have no idea how to prevent crashes e.printStackTrace();