How do I call the finish () action method from the Application object?

I have a piece of code to delete an item in a database. I am calling the same code from two different activities. Therefore, to avoid repetition of code, I want to move the code into an application object. The code in one of the activities looks like this:

private void deleteItem() {
    AlertDialog.Builder alert = new AlertDialog.Builder(Activity1.this);
    alert.setTitle(R.string.confirmTitle);
    alert.setMessage(R.string.confirmMessage);
    alert.setPositiveButton(R.string.delete_btn,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int button) {
                    final DbHelper db = new DbHelper(Activity1.this);
                    AsyncTask<Long, Void, Object> deleteTask = new AsyncTask<Long, Void, Object>() {
                        @Override
                        protected Object doInBackground(Long... params) {
                            db.deleteItem(params[0]);
                            return null;
                        }

                        @Override
                        protected void onPostExecute(Object result) {
                            finish();
                        }
                    };
                    deleteTask.execute(new Long[] { rowID });
                }
            });
    alert.setNegativeButton(R.string.cancel_btn, null).show();
}

      

        
        
        
      

    

Now, to put it in the application object, I changed the function to public, gave it two parameters to input: Context and rowID. But in the onPostExecute AsyncTask method, I need to close the activity. In this operation, I did it using finish (). How can this be done in this context? I also added code to the application object.

public void deleteItem(final Context context, final long rowID) {
    AlertDialog.Builder alert = new AlertDialog.Builder(context);
    alert.setTitle(R.string.confirmTitle);
    alert.setMessage(R.string.confirmMessage);
    alert.setPositiveButton(R.string.delete_btn,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int button) {
                    final DbHelper db = new DbHelper(context);
                    AsyncTask<Long, Void, Object> deleteTask = new AsyncTask<Long, Void, Object>() {
                        @Override
                        protected Object doInBackground(Long... params) {
                            db.deleteItem(params[0]);
                            return null;
                        }

                        @Override
                        protected void onPostExecute(Object result) {
                            finish();
                            }
                    };
                    deleteTask.execute(new Long[] { rowID });
                }
            });
    alert.setNegativeButton(R.string.cancel_btn, null).show();
}