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This article mainly introduces how to use layer-list in Android, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Using layer-list, multiple drawable can be displayed on top of each other in order. By default, all drawable in item will automatically scale according to the size of the view attached to it.

The item in layer-list is superimposed from the bottom to the top in order, that is, the first defined item is at the bottom, and the next one is stacked on top.

Examples

Overall Arrangement

The red item is finally defined at the top, in the middle of the green item, and at the bottom of the blue color.

The android:bottom= "50dp" android:top= "50dp" android:left= "50dp" android:right= "50dp" attribute android:top= "50dp" is set here; it means that the upper side of the item shrinks 50 dpandroid bottoms inwards with the upper boundary of ImageView, which means that the lower side of the item shrinks 50 dpandroidandroid:left= inward with the lower boundary of ImageView; indicates that the item shrinks 50 dpandroidright= "50dp" with the left edge of ImageView; indicates that the right side of the item shrinks inward with the right boundary of ImageView.

Android:bottom= "25dp" android:top= "25dp" android:left= "25dp" android:right= "25dp" is similar

Layer-list implements a three-sided border for a specified view.

Overall Arrangement

Code:

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