Android的背景渐变和平铺图像 [英] Android background with gradient and tiled image

问题描述

对于一个LinearLayout中，我希望有一起在背景平铺（重复）的图像的渐变。我已经有一个形状XML设置为背景

For a linearLayout, I want to have a gradient along with a tiled (repeated) image in the background. I already have a shape xml set as the background

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient android:angle="90"
        android:endColor="@color/color1"
        android:startColor="@:color/color2">
    </gradient>
</shape>

我如何添加一个平铺的背景图片？

How do I add a tiled bg image?

推荐答案

查看 LayerLists 。

下面是一个XML绘制，名为 myBackground.xml ，放在 RES /绘制。 它设置为视图的背景要设置渐变和瓷砖背景。

The following is an XML drawable, called myBackground.xml, placed in res/drawable. Set it as the background of the View you want to set a gradient and tiled background for.

在下面的例子中，平铺图像将在坡度的顶部，因为它是在后面指定的 LayerList - 很明显，如果这是在上面，你会需要对PNG图像平铺一些透明度（你可以把这个在图像编辑应用程序，像GIMP或Photoshop）。

In the example below, the tiled image will be on top of the gradient, because it is specified later in the LayerList - obviously if it's on top, you'll need some transparency on the png image tile (you can set this in an image editing application, like GIMP or Photoshop).

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <gradient
                android:type="radial" android:gradientRadius="500"
                android:startColor="#17568A"
                android:endColor="#494C4F" />  

        </shape>
    </item>
    <item>
        <bitmap
            android:src="@drawable/tile_classy_fabric"
            android:tileMode="repeat" />
    </item>
</layer-list>

tile_classy_fabric指的是一个名为tile_classy_fabric.png在我的 RES /绘制文件夹中（250像素正方形文件，因为它是平铺 - 我们不需要它超大）。

"tile_classy_fabric" refers to a file called "tile_classy_fabric.png" in my res/drawable folder (250px square, as it's tileable - we don't need it super large).

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