匿名内部类（非匿名内部类）的优点是什么？

Consider this (anonymous):

考虑这个(匿名):

speakBtn.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View view) {
        mTts.speak(words.getText().toString(), TextToSpeech.QUEUE_ADD, null);
    }});
speakB