prevQuoteButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
               /* Snackbar.make(view, "Previous Quote", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();*/
               if(prevIndex != 0) {
                   prevIndex--;
                   previousQuoteHelper(prevIndex);
               }
               else {
                   Toast.makeText(MainActivity.this, "Get a new Quote!", Toast.LENGTH_SHORT).show();
               }

            }
        });

/*
    * Helper method for previous quote button
    * @param prevIndex
    */
    public void previousQuoteHelper(int prevIndex) {
        currentQuote = quoteList.get(prevIndex);
        quoteTextView.setText(currentQuote.getQuote() +"n"+ currentQuote.getAuthor());
        if(currentQuote.isFave()) {
            //set action bar icon to red
        }
        else {
            //change action bar icon to white
        }
//        isPreviousQuote = true;
        Log.v("PREVIOUS:", prevIndex +" "+ currentQuote.getQuote() +" "+ currentQuote.isFave());
    }