如何在android中用xml制作两种颜色的可绘制矩形？

Question

我想通过在android中使用xml来制作类似的东西。我用45度的渐变实现了类似的效果，但我不想要渐变，而是像这样的素色。非常感谢您的任何建议。提前谢谢。

这就是我想用xml做的。

我需要很多这样的，所以我不能在绘图文件夹中加载位图。] 1

Answer 1

我不知道这在XML中是否可行。在Java中，一种可能的方法是创建一个形状，并用它构建一个ShapeDrawable。

两个三角形可绘制。JAVA

public class TwoTrianglesDrawable extends ShapeDrawable {

    public TwoTrianglesDrawable(){
        super();
        setShape(new TwoTrianglesShape());
    }

    private class TwoTrianglesShape extends Shape {

        @Override
        public void draw(Canvas canvas, Paint paint) {

            Path path = new Path();
            path.setFillType(Path.FillType.INVERSE_EVEN_ODD);
            Path path1 = new Path();
            path1.setFillType(Path.FillType.INVERSE_EVEN_ODD);

            paint.setStrokeWidth(0);
            paint.setStyle(Paint.Style.FILL);
            paint.setAntiAlias(true);

            paint.setColor(Color.YELLOW);

            Point a = new Point(0, 0);
            Point b = new Point(0, (int) getHeight());
            Point c = new Point((int)getWidth(), (int)getHeight());

            path.moveTo(a.x, a.y);
            path.lineTo(b.x, b.y);
            path.lineTo(c.x, c.y);
            path.close();
            canvas.drawPath(path, paint);

            paint.setColor(Color.BLUE);

            Point a1 = new Point(0, 0);
            Point b1 = new Point((int)getWidth(),0);
            Point c1 = new Point((int)getWidth(), (int)getHeight());

            path1.moveTo(a1.x, a1.y);
            path1.lineTo(b1.x, b1.y);
            path1.lineTo(c1.x, c1.y);
            path1.close();
            canvas.drawPath(path1, paint);

        }
    }
}

例如，使用RelativeLayout作为背景：

RelativeLayout layout = (RelativeLayout) findViewById(R.id.layout);

ShapeDrawable background = new TwoTrianglesDrawable();
layout.setBackground(background);//Requires API 16 or higher.

Answer 2

下面的答案是无耻地从这里复制的，如何在android中制作渐变背景

试试这个：

<gradient
    android:angle="90"   //you need to change angle as per your needs (270 might work in your case)
    android:centerColor="#555994"  //try playing with colors of start, center and End colors to get desired result. also try removing some.
    android:endColor="#b5b6d2"
    android:startColor="#555994"
    android:type="linear" />

<corners 
    android:radius="0dp"/>

要使用上述代码，您需要制作一个可绘制的。xml文件，复制

谢谢。

Answer 3

可以使用Android PathShape类绘制两个所需颜色的三角形