Android TableLayout下划线宽度

• 直接上代码（可直接复制使用）

/**
 * 设置tabLayout下划线左右边距
 *
 * @param tabs     TabLayout
 * @param leftDip  左边距
 * @param rightDip 右边距
 */
public void setIndicator(TabLayout tabs, int leftDip, int rightDip) {
    Class<?> tabLayout = tabs.getClass();
    Field tabStrip = null;
    try {
        tabStrip = tabLayout.getDeclaredField("mTabStrip");
        tabStrip.setAccessible(true);
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    }
    LinearLayout llTab = null;
    try {
        if (tabStrip != null)
            llTab = (LinearLayout) tabStrip.get(tabs);
        //边距值，转换为dip。
        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());

        if (llTab != null) {
            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();
            }
        }
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}