setOnClickListener crashes my app

so whenever I try to use setOnClickListener method my app crashes.

protected void onCreate(Bundle savedInstanceState) { Answer mAnswer = new Answer(); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView answerLabel = (TextView) findViewById(R.id.textLabel); Button askButton = (Button) findViewById(R.id.answerButton); askButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub

        }
    });
}

The only part of code that was edited. I also deleted some parts of code as shown in "Crystal Ball" project. But it doesn't work without them. I'm certain that it's that part which breaks my program, because I tried to run my app without it and it worked.