Android的布局背景质感的xml [英] Android layout background xml texture

问题描述

我搜索了很多，但没有发现任何东西。我想为布局背景，但不是用一种颜色或渐变填充它，我想与纹理填充它，并重复了。我试过，但没有奏效。你能告诉我一个解决方案。

I searched a lot but didn't find anything. I want to make a background for a layout , but instead of filling it with a color or a gradient I want to fill it with a texture and repeat it . I tried this but it didn't work . Can you tell me a solution.

card_texture.xml

card_texture.xml

<?xml version="1.0" encoding="utf-8"?>
    <bitmap
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:src="@drawable/paper_texture"
        android:tileMode="repeat"
    />

card_shape.xml

card_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<shape

    android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">

    <solid android:color = "@android:color/transparent"/>

    <stroke android:width="2dp"
        android:color="@color/text_color"/>

    <corners
        android:radius="20dp"
        />

</shape>

card_background.xml

card_background.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/card_texture" >
       <corners
            android:radius = "20dp"/>

    </item>
    <item android:drawable="@drawable/card_shape" />
</layer-list>

这就是我如何使用它在我的布局的android：背景=@绘制/ card_background

我得到这样的事情。但我想角落的纹理（用红色标出）是透明的，以适合黑色边框

I get something like this. But I want the corners(marked with red) of the texture to be transparent and to fit in the black border

推荐答案

我称之为 RES /绘制/ bg_tile.xml

<?xml version="1.0" encoding="utf-8"?>
<bitmap
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/tile"
    android:tileMode="mirror"
    android:dither="true"
    android:antialias="true"
/>

我用它喜欢的：

android:background="@drawable/bg_tile"

Obiously，我prepared一瓦水平翻转和垂直方向（最瓷砖作出这样的一个有趣的效果），并把它称为 RES /绘-A-dpi的分辨率/ tile.png

A-dpi的分辨率是LDPI，MDPI，...，xxxhdpi

a-dpi-resolution being ldpi, mdpi, ..., xxxhdpi

如果你想使用的复合背景（即梯度和在它平铺位 - 但位图有以某种方式透明，否则会覆盖梯度），你可以做一个LayerList背景（所以不同层是DRAN 1 ontop的另一个）

If you want to use a composite background (i.e. a gradient and a tiling bitmap over it - but the bitmap has to be somehow transparent, or it will cover the gradient), you can make a LayerList background (so that different "layers" are dran one ontop of another)

要做到这一点，你需要添加其他的背景文件，即： RES /绘制/ bg_radial.xml

To do that, you'll need to add another background file, i.e.: res/drawable/bg_radial.xml:

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"
    >
    <gradient
        android:startColor="#@color/bar_int_md"
        android:centerColor="#@color/bar_mid_md"
        android:endColor="#@color/bar_ext_md"
        android:gradientRadius="480"
        android:type="radial"
    />
</shape>

终于LayerList，这粘在一起（ RES /绘制/ bg.xml ）

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/bg_radial" />
    <item android:drawable="@drawable/bg_tile" />
</layer-list>

请注意，第一项被首先绘制。下一个数据项都绘制ontop彼此的，是最后一个最

Note that the first item is drawn first. Next items are drawn ontop of each other, being the last one the "uppermost".

所以，最后你会使用这个像：

So, finally you would use this like:

android:background="@drawable/bg"

不错！

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