MagicIndicator文字变大变小的问题

package com.android.mine.utils;

import android.content.Context;

import com.netease.nim.uikit.common.util.sys.ScreenUtil;

import net.lucode.hackware.magicindicator.buildins.ArgbEvaluatorHolder;
import net.lucode.hackware.magicindicator.buildins.commonnavigator.titles.SimplePagerTitleView;


/**
 * 两种颜色过渡的指示器标题
 * 博客: http://hackware.lucode.net
 * Created by hackware on 2016/6/26.
 */
public class BNColorTransitionPagerTitleView extends SimplePagerTitleView {

    public BNColorTransitionPagerTitleView(Context context) {
        super(context);
    }

    @Override
    public void onLeave(int index, int totalCount, float leavePercent, boolean leftToRight) {
        int color = ArgbEvaluatorHolder.eval(leavePercent, mSelectedColor, mNormalColor);
        setTextColor(color);

    }

    @Override
    public void onEnter(int index, int totalCount, float enterPercent, boolean leftToRight) {
        int color = ArgbEvaluatorHolder.eval(enterPercent, mNormalColor, mSelectedColor);
        setTextColor(color);

    }

    @Override
    public void onSelected(int index, int totalCount) {
        getPaint().setTextSize(ScreenUtil.sp2px(15));
    }

    @Override
    public void onDeselected(int index, int totalCount) {
        getPaint().setTextSize(ScreenUtil.sp2px(12));
    }
}

注意，要用getPaint,不能直接setTextSize