AssetManager access = getAssets();
String DB_PATH = "/data/data/<package name>/databases/";
byte [] buffer = new byte [1024];
int length;
InputStream dbInputStream = null;
OutputStream dbOutputStream = null;
//move the db to the designated path
if ((new File(DB_PATH + "test.db")).exists() == false) {
  File f = new File(DB_PATH);
  if (!f.exists()) {
    f.mkdir();
  }
}

try {
  dbInputStream = access.open("test.db");
  dbOutputStream = new FileOutputStream(DB_PATH + "test.db");
  while ((length = dbInputStream.read(buffer)) > 0) {
    dbOutputStream.write(buffer, 0, length);
  }
  dbOutputStream.flush();
  dbOutputStream.close();
  dbInputStream.close();

} catch (Exception e) {
    e.printStackTrace();
}

SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH+"test.db", null);