Android开发 设置tablayout下划线长度和内容保持一致

     废话不多说，直接看一下效果吧：

     

   改变下划线和内容的长度一致可以给用户更好的体验，在这里主要使用反射的方式，直接上代码吧

 public static void reflex(final TabLayout tabLayout){
        tabLayout.post(new Runnable() {
            @Override
            public void run() {
                try {
                    //拿到tabLayout的mTabStrip属性
                    Field mTabStripField = tabLayout.getClass().getDeclaredField("mTabStrip");
                    mTabStripField.setAccessible(true);
                    LinearLayout mTabStrip = (LinearLayout) mTabStripField.get(tabLayout);
                    int dp10 = Utils.dip2px1(tabLayout.getContext(), 10);
                    for (int i = 0; i < mTabStrip.getChildCount(); i++) {
                        View tabView = mTabStrip.getChildAt(i);
                        //拿到tabView的mTextView属性
                        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 width = 0;
                        width = mTextView.getWidth();
                        if (width == 0) {
                            mTextView.measure(0, 0);
                            width = mTextView.getMeasuredWidth();
                        }
                        LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) tabView.getLayoutParams();
                        params.width = width ;
                        params.leftMargin = dp10;
                        params.rightMargin = dp10;
                        tabView.setLayoutParams(params);
                        tabView.invalidate();
                    }
                } catch (NoSuchFieldException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
        });

    }

tablayout的标题我是这样添加的：

        tabLayout.addTab(tabLayout.newTab().setText("首页"));
        tabLayout.addTab(tabLayout.newTab().setText("单品花束"));
        tabLayout.addTab(tabLayout.newTab().setText("混合花束"));
        tabLayout.addTab(tabLayout.newTab().setText("MINI花束"));
        tabLayout.addTab(tabLayout.newTab().setText("礼品"));
        tabLayout.addTab(tabLayout.newTab().setText("花瓶"));
        tabLayout.addTab(tabLayout.newTab().setText("周边"));

希望对大家有帮助！