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?
views:
401answers:
1
A:
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);
}
};
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);
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.
Casebash
2010-05-04 02:27:20