Android TabLayout下方下劃線的寬度

                Android  TabLayout下方下劃線的寬度
     今天做項目遇到了這樣一個問題，tablayout需要設置下劃線的寬度，在網上找了半天也沒找到，後來瞭解在源碼中對tabLayout的下劃線進行了設置.並沒有方法可以直接設置

下面我們看一下代碼：

 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();
        }


    }
至於使用方式的話,直接調用方法即可.必須要在Tablayout渲染出來後調用,我們可以選擇view.post()方法來實現:
 

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