Rating bar + android sqlite issue

Currently my codes is working except for 2 issues.

Issues

1. Only able to add name and rating once
2. Can only update the ratings not the name

Below is the source code I feel that is giving me the issue, but I have tried editing the codes, but the result is still the same. If anyone can take some time to take a look, I will appreciate it.

If not, could you please provide some links that are related? I have been trying to get the code working for 2 days now and it is still giving me the same problem. I came here hoping that someone can help me.

MainActivity.java

        lvInfo.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                txtName.setText(results.get(position).getName());
               ratingBar.setRating(results.get(position).getRating());

            }
        });
        DisplayAll();
    }

    public void DisplayAll() {
        results = db.getAllResults();
        ArrayofName.clear();
        for (Result rs : results) {
            ArrayofName.add(rs.getId() + ".\t" + rs.getName() + ".\t" + rs.getRating());
        }
        dbAdapter.notifyDataSetChanged();
        txtName.setText("");
        ratingBar.setRating(5);
    }

    public void AddResult(View view) {
        if ((txtName.getText().length() == 0) || (ratingBar.getRating() == 0) )
            Toast.makeText(this, "Please enter the name and rating to be added!",  Toast.LENGTH_LONG).show();
        else {
            Result tmp = new Result(txtName.getText().toString(),
                    ratingBar.getRating() );

            db.addResult(tmp);
            DisplayAll();
            Toast.makeText(this, "Results Added!", Toast.LENGTH_LONG).show();
        }
    }

    public void UpdateResult(View view) {
        if ((txtName.getText().length() == 0) || (ratingBar.getRating() == 0) )
            Toast.makeText(this, "Please select result to be updated!", Toast.LENGTH_LONG).show();
        else {
            Result tmp = new Result(txtName.getText().toString(),ratingBar.getRating() );

            db.updateResult(tmp);
            DisplayAll();
            Toast.makeText(this, "Result Updated!", Toast.LENGTH_LONG).show();
        }
    }
}