Android TabLayout下方下划线的宽度

                Android  TabLayout下方下划线的宽度
     今天做项目遇到了这样一个问题，tablayout需要设置下划线的宽度，在网上找了半天也没找到，后来了解在源码中对tabLayout的下划线进行了设置.并没有方法可以直接设置

下面我们看一下代码：

 public void setIndicator(TabLayout tabs, int leftDip, int rightDip) {
        Class<?> tabLayout = tabs.getClass();
        Field tabStrip = null;
        try {
            tabStrip = tabLayout.getDeclaredField("mTabStrip");
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }

        tabStrip.setAccessible(true);
        LinearLayout llTab = null;
        try {
            llTab = (LinearLayout) tabStrip.get(tabs);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        int left = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, leftDip, Resources.getSystem().getDisplayMetrics());
        int right = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, rightDip, Resources.getSystem().getDisplayMetrics());

        for (int i = 0; i < llTab.getChildCount(); i++) {
            View child = llTab.getChildAt(i);
            child.setPadding(0, 0, 0, 0);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 1);
            params.leftMargin = left;
            params.rightMargin = right;
            child.setLayoutParams(params);
            child.invalidate();
        }


    }
至于使用方式的话,直接调用方法即可.必须要在Tablayout渲染出来后调用,我们可以选择view.post()方法来实现:
 

tablyout1.post(new Runnable() {
    @Override
    public void run() {
        setIndicator(tablyout1,60,60);
    }
});