answer1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(answer1.getText() == mAnswer) {
                    mScore++;
                    score.setText("Punkte: " + mScore);
                    answer1.setBackgroundResource(R.color.colorCorrect);
                    try {
                        Thread.sleep(3000);
                    } catch (InterruptedException ex) {
                        System.out.println("Error");
                    }
                    fragezaehler.setText(mQuestionNumber + "/" + mQuestionLength);
                    updateQuestion(mQuestionNumber++);
                }
                else{
                    score.setText("Punkte: " + mScore);
                    answer1.setBackgroundResource(R.color.colorFalse);
                    try {
                        Thread.sleep(3000);
                    } catch (InterruptedException ex) {
                        System.out.println("Error");
                    }
                    fragezaehler.setText(mQuestionNumber + "/" + mQuestionLength);
                    updateQuestion(mQuestionNumber++);
                }