Question

Uisng XML是否可以创建一个drawable，其中一半是color1而另一半是color2？当我将drawable设置为视图的背景时，它应该如下图所示。

Answer 1

通过xml执行：

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:right="100dp">
    <shape android:shape="rectangle">
        <size android:height="100dp" android:width="100dp"/>
        <solid android:color="@android:color/black"/>
    </shape>
</item>

<item android:left="100dp">
    <shape android:shape="rectangle">
        <size android:height="100dp" android:width="100dp"/>
        <solid android:color="@android:color/holo_green_light"/>
    </shape>
</item>
</layer-list>

将其放入res/drawable文件夹并指定为android:background到图像

Answer 2

您可以尝试创建2个具有相应颜色的形状，然后使用它们。

您可以通过为它们创建尺寸和颜色来制作这些形状。

Answer 3

有可能。你可以：

1）创建一个形状

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

  android:shape="rectangle" >

  <stroke
    android:width="1dp"
    android:color="@color/gray_light" />

  <gradient
    android:type="linear"
    android:centerX="0"
    android:centerY="1"
    android:startColor="#bff54a"
    android:endColor="#88c010" />

  <corners
    android:bottomLeftRadius="8dp"
    android:bottomRightRadius="8dp"
    android:topLeftRadius="8dp"
    android:topRightRadius="8dp" />

</shape>

2）扩展drawable类

public class ColorBarDrawable extends Drawable {

    private int[] themeColors;

    public ColorBarDrawable(int[] themeColors) {
        this.themeColors = themeColors;
    }

    @Override
    public void draw(Canvas canvas) {

        // get drawable dimensions
        Rect bounds = getBounds();

        int width = bounds.right - bounds.left;
        int height = bounds.bottom - bounds.top;

        // draw background gradient
        Paint backgroundPaint = new Paint();
        int barWidth = width / themeColors.length;
        int barWidthRemainder = width % themeColors.length;
        for (int i = 0; i < themeColors.length; i++) {
            backgroundPaint.setColor(themeColors[i]);
            canvas.drawRect(i * barWidth, 0, (i + 1) * barWidth, height, backgroundPaint);
        }

        // draw remainder, if exists
        if (barWidthRemainder > 0) {
            canvas.drawRect(themeColors.length * barWidth, 0, themeColors.length * barWidth + barWidthRemainder, height, backgroundPaint);
        }

    }

    @Override
    public void setAlpha(int alpha) {
    }

    @Override
    public void setColorFilter(ColorFilter cf) {

    }

    @Override
    public int getOpacity() {
        return PixelFormat.OPAQUE;
    }

}

来源：手写代码 - StackOverflow

如何创建由两种颜色并排组成的android drawable？

3 个答案: