Fix crash from using Fragment#getContext()

        final int crescendoSeconds = preference.getPersistedCrescendoLength();

        final TextView unitView = (TextView) view.findViewById(R.id.title);

        unitView.setText(getContext().getString(R.string.crescendo_picker_label));

        unitView.setText(R.string.crescendo_picker_label);

        updateUnits(unitView, crescendoSeconds);

        final String[] displayedValues = new String[13];

        displayedValues[0] = getContext().getString(R.string.no_crescendo_duration);

        displayedValues[0] = getString(R.string.no_crescendo_duration);

        for (int i = 1; i < displayedValues.length; i++) {

            displayedValues[i] = String.valueOf(i * CRESCENDO_TIME_STEP);

        }