Cannot delete a row from sqlite database

I am having problem in deleting a movie from my database. I tried to follow tutorials from youtube and through ebooks but that didnt helped me a lot. Here i have done the full coding of my deletemovie

THis is my deleteMovie().java code:

public class DeleteMovie extends Activity{

DatabaseHandler dh;
private static final String ROW_ID = "row_id";
//private static final long rowid = Long.parseLong(ROW_ID);


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.deletemoviemenu);
    ListView movieList = (ListView)findViewById(R.id.listViewDeleteMovie);
    openDB();
    populateListViewFromDB();
    //registerListClickCallback();
    movieList.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

            Intent i = new Intent();
            i.putExtra(ROW_ID, arg3);
            deleteMovie();


        }
    });
}
@Override
protected void onDestroy() {
    super.onDestroy();  
    closeDB();
}

private void openDB() {
    dh = new DatabaseHandler(this);
    dh.open();
}
private void closeDB() {
    dh.close();
}

private void populateListViewFromDB() {
    Cursor cursor = dh.getAllRows();

    // Allow activity to manage lifetime of the cursor.
    // DEPRECATED! Runs on the UI thread, OK for small/short queries.
    startManagingCursor(cursor);

    // Setup mapping from cursor to view fields:
    String[] fromFieldNames = new String[] 
            {dh.KEY_KEY, dh.KEY_TITLE};
    int[] toViewIDs = new int[]
            {R.id.textViewiddelete, R.id.textViewtitledelete};

    // Create adapter to may columns of the DB onto elemesnt in the UI.
    SimpleCursorAdapter myCursorAdapter = 
            new SimpleCursorAdapter(
                    this,       // Context
                    R.layout.deleterow, // Row layout template
                    cursor,                 // cursor (set of DB records to map)
                    fromFieldNames,         // DB Column names
                    toViewIDs               // View IDs to put information in
                    );

    // Set the adapter for the list view
    ListView movieList = (ListView) findViewById(R.id.listViewDeleteMovie);
    movieList.setAdapter(myCursorAdapter);
}

private void deleteMovie(){
    AlertDialog.Builder builder = new AlertDialog.Builder(DeleteMovie.this);
    builder.setTitle("Are you sure wanna delete?");
    builder.setTitle("Wanna delete ah??");

    builder.setPositiveButton("Delete pannuda", new DialogInterface.OnClickListener() {


        @Override
        public void onClick(DialogInterface dialog, int which) {
            // TODO Auto-generated method stub
            AsyncTask<Long, Object, Object>deleteMovie = new AsyncTask<Long, Object, Object>(){
                public long idInDB;
                @Override
                protected Object doInBackground(Long... params){
                    //dh.getRow(params[0]);
                    Cursor cursor = dh.getRow(idInDB);
                    if (cursor.moveToFirst()) {
                        long idDB = cursor.getLong(dh.COL_ROWID);
                        dh.deleteRow(params[0]);

                    }
                    return null;
                }

                @Override
                protected void onPostExecute(Object result){
                    finish();
                }
            };
            long rowid = Long.parseLong(ROW_ID);
            deleteMovie.execute(new Long[] {rowid});
        }
    }
    );

    builder.setNegativeButton("Cancel pannuda", null);
    builder.show();

}

private void displayToastForId(long idInDB) {
    Cursor cursor = dh.getRow(idInDB);
    if (cursor.moveToFirst()) {
        long idDB = cursor.getLong(dh.COL_ROWID);
        String mvkey = cursor.getString(dh.COL_KEY);
        String mvtitle = cursor.getString(dh.COL_TITLE);
        //String favColour = cursor.getString(DBAdapter.COL_FAVCOLOUR);

        String message = "ID: " + idDB + "\n" 
                + "Name: " + mvtitle + "\n"
                + "Key#: " + mvkey;
                //+ "FavColour: " + favColour;
        Toast.makeText(DeleteMovie.this, message, Toast.LENGTH_LONG).show();
    }
    cursor.close();
}
}

The error message which I am getting on my logcat:

java.lang.NumberFormatException: Invalid long: "row_id"
at java.lang.Long.invalidLong(Long.java:125)
com.example.moviemanager.DeleteMovie$2.onClick(DeleteMovie.java:120)

Can i know how can i solve this error. THank you.