Inset Drawable

InsetDrawable详解

最新推荐文章于 2021-09-13 17:44:09 发布

转载最新推荐文章于 2021-09-13 17:44:09 发布 · 396 阅读

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本文介绍了一种特殊的Drawable资源——InsetDrawable，它可以将其他Drawable资源按指定距离内嵌，适用于需要背景比视图实际边界小的场景。文章详细解释了InsetDrawable的XML定义方式及其属性。

Inset Drawable

A drawable defined in XML that insets another drawable by a specified distance.This is useful when a View needs a background that is smaller than the View's actual bounds.

FILE LOCATION:

res/drawable/filename.xml
The filename is used as the resource ID.

COMPILED RESOURCE DATATYPE:

Resource pointer to a InsetDrawable.

RESOURCE REFERENCE:

In Java: R.drawable.filename
In XML: @[package:]drawable/filename

SYNTAX:

<?xml version="1.0" encoding="utf-8"?>
<inset
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/drawable_resource"
    android:insetTop="dimension"
    android:insetRight="dimension"
    android:insetBottom="dimension"
    android:insetLeft="dimension" />

ELEMENTS:

<inset>

Defines the inset drawable. This must be the root element.

attributes:

xmlns:android

String. Required. Defines the XML namespace, which must be "http://schemas.android.com/apk/res/android".

android:drawable

Drawable resource. Required. Reference to a drawable resource to be inset.

android:insetTop

Dimension. The top inset, as a dimension value or dimension resource

android:insetRight

Dimension. The right inset, as a dimension value or dimension resource

android:insetBottom

Dimension. The bottom inset, as a dimension value or dimension resource

android:insetLeft

Dimension. The left inset, as a dimension value or dimension resource

EXAMPLE:

<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/background"
    android:insetTop="10dp"
    android:insetLeft="10dp" />