着色器作为绘制(安卓) [英] Shader as a drawable (Android)
本文介绍了着色器作为绘制(安卓)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我如何使用获得的可绘制一个着色器
(如的LinearGradient
),这样我可以用它在我的用户界面背景?
How do I use obtain a drawable from a Shader
(such as LinearGradient
) so that I can use it as a background in my UI?
推荐答案
由于背景可能需要调整,我们将使用 ShaderFactory
产生着色器
:
Since the background will probably need to resize, we will use a ShaderFactory
to produce the Shader
:
ShapeDrawable.ShaderFactory sf=new ShapeDrawable.ShaderFactory() {
@Override
public Shader resize(int width, int height) {
return new LinearGradient(0, 0, width, height,
new int[]{Color.WHITE, Color.GRAY, Color.BLACK},
new float[]{0,0.5f,1}, Shader.TileMode.MIRROR);
}
};
我们用它来创建一个 PaintDrawable
,我们可以作为背景使用:
We use this to create a PaintDrawable
which we can use as a background:
PaintDrawable p=new PaintDrawable();
p.setShape(new RectShape());
p.setShaderFactory(sf);
getWindow().setBackgroundDrawable(p);
这只是一个例子,在这种情况下,它实际上是更好的使用,只是宣布该 XML 。看看这里的例子。
This is just an example and in this case it would actually be better to just declare this using XML. Look at the example here.
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