Я пытаюсь использовать свою собственную базу данных в своем приложении для Android, используя этот учебникhttp://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/

Моя база данных в папке с активами работала в течение 5 часов, чтобы справиться с работой, но зря .. Я всегда продолжаю получать

01-17 04:09:07.111: E/Database(1060): sqlite3_open_v2("/data/data/com.rahul.besttracker/databases/route", &handle, 1, NULL) failed

а также

01-17 04:09:07.271: E/AndroidRuntime(1060): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rahul.besttracker/com.rahul.besttracker.Busdisplay}: android.database.sqlite.SQLiteException: unable to open database file

мой код

    public class Busdisplay extends ListActivity {
TextView source, destination;
String src, dest;
ArrayList mArrayList;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);

    init();
    Bundle caught = getIntent().getExtras();
    src = caught.getString("source");
    dest = caught.getString("dest");

    DataBaseHelper entry = null;

    entry = new DataBaseHelper(Busdisplay.this);

    entry.openDataBase();

    mArrayList = entry.readEntry(src, dest);

    entry.close();

    setListAdapter(new ArrayAdapter(this,
            android.R.layout.simple_list_item_1, mArrayList));
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method stub
    super.onListItemClick(l, v, position, id);
}

void init() {
    source = (TextView) findViewById(R.id.textView1);
    destination = (TextView) findViewById(R.id.textView2);
}

   }

Мой класс DBhelper

    public class DataBaseHelper extends SQLiteOpenHelper {

// The Android's default system path of your application database.
private static final String DB_PATH =   "/data/data/com.rahul.besttracker/databases/";

private static final String DB_NAME = "route.db";
private static final String DB_TABLE1 = "route1";
private static final String DB_TABLE2 = "route2";
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() 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 {

            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) {

        System.out.print("ERROR");
    }

    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) {
    try {
        createDataBase();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE1);
    db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE2);
    onCreate(db);
}

public ArrayList readEntry(String src, String dest) {

    // TODO Auto-generated method stub
    Cursor c = myDataBase.rawQuery("SELECT route_no from " + DB_TABLE1
            + " WHERE stops LIKE '%" + src + "%,%" + dest + "%';", null);
    ArrayList mArrayList = new ArrayList();
    int index = c.getColumnIndex("route_no");
    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
        // The Cursor is now set to the right position
        mArrayList.add(c.getString(index));
    }
    return mArrayList;
}

// 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.

  }