What seems to be the problem?

// Declare our View variables and assign them the views from the Layout file
        final TextView factLabel = (TextView) findViewById(R.id.factTextView);
        Button showFactButton = (Button) findViewById(R.id.showFactButton);
        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View view) {
              // The button was clicked so update the fact label with a new fact.
                String fact = "Salsa e mai rapida decat bachata.";
                factLabel.setText(fact);
            }
        };
        showFactButton.setOnClickListener(listener);
    }