android - 布局时的边距如何从 view 的中心算起，而不是从左上角算起？

Question

比如说有一张图片，我想让这张图片的中心距离父 view 的左边距是 x，图片大小不一定，这个操作在 Android 下该如何完成呢？

Answer 1

Adjust the marginLeft value of imageView

Answer 2

Move the original left margin to the left by half the width of the image, that is, subtract half the width of the image.

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If the image width is not sure, you can wait until it is confirmed and then dynamically change it.

Answer 3

If the poster's x is a fixed value, just use layout_marginLeft to get it. If it is a changing value, control it in the code.