监听editText字数计数并显示

private int fontCount;

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {

        fontCount = start + count;
        fontCountTv.setText(fontCount + "/100");
    }

    @Override
    public void afterTextChanged(Editable s) {

    }