美文网首页
TabLayout如何设置下划线(Indicator)宽度

TabLayout如何设置下划线(Indicator)宽度

作者: 冬瓜去哪儿 | 来源:发表于2019-01-08 11:33 被阅读0次
    public void reflex(final TabLayout tabLayout) {
        //了解源码得知 线的宽度是根据 tabView的宽度来设置的
            tabLayout.post(new Runnable() {
                @Override
                public void run() {
                    try {
                        //拿到tabLayout的mTabStrip属性
                        LinearLayout mTabStrip = (LinearLayout) tabLayout.getChildAt(0);
                        int dp10 = dip2px(tabLayout.getContext(), 10);
                        for (int i = 0; i < mTabStrip.getChildCount(); i++) {
                            View tabView = mTabStrip.getChildAt(i);
                            //拿到tabView的mTextView属性  tab的字数不固定一定用反射取mTextView
                            Field mTextViewField = tabView.getClass().getDeclaredField("mTextView");
                            mTextViewField.setAccessible(true);
                            TextView mTextView = (TextView) mTextViewField.get(tabView);
                            tabView.setPadding(0, 0, 0, 0);
                            //因为我想要的效果是  字多宽线就多宽,所以测量mTextView的宽度
                            int tabWidth = 0;
                            tabWidth = tabView.getWidth();
                            if (tabWidth == 0) {
                                tabView.measure(0, 0);
                                tabWidth = mTextView.getMeasuredWidth();
                            }
                            LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) tabView.getLayoutParams();
                            int margin = (tabWidth - mTextView.getWidth()) / 2;
                            params.leftMargin = margin;
                            params.rightMargin = margin;
                            tabView.setLayoutParams(params);
                            tabView.invalidate();
                        }
                    } catch (NoSuchFieldException e) {
                        e.printStackTrace();
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    }
                }
            });
        }
    

    相关文章

      网友评论

          本文标题:TabLayout如何设置下划线(Indicator)宽度

          本文链接:https://www.haomeiwen.com/subject/nbdvrqtx.html