layout_gravity center along with layout_marginRight issue

问题

I am not able to get reason why there is difference in below two views, only difference is layout_gravity center is missing in second one

<?xml version="1.0" encoding="utf-8"?>
<View
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_gravity="top|center"
    android:layout_height="10dp"
    android:layout_marginRight="100dp"
    android:background="@android:color/holo_red_dark"
        />

<?xml version="1.0" encoding="utf-8"?>
<View
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_gravity="top"
    android:layout_height="10dp"
    android:layout_marginRight="100dp"
    android:background="@android:color/holo_red_dark"
        />

回答1:

When you're doing android:layout_gravity="top|center" I think that margin_right is making go the view to the left

Could that be it?

Edited

I used your code to see and this is the result

回答2:

here is my ques.

Reason behind extra 8dp margin in a view ? not ways to solve

under my words there is an underline..

• i represented it as a view with black background.
• with leftmargin of 48dp.
• but as you see there is an 8dp extra.
• i am looking for a genuine reason.
• not other ways to sort it out.
• check my link for further details.

来源：https://stackoverflow.com/questions/31212020/layout-gravity-center-along-with-layout-marginright-issue