如何将颜色值动态传递给xml

Question

我有一个将绘制椭圆形的xml,代码如下:

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <solid android:color="#61118"/>
    <stroke android:width="1sp" android:color="#1B434D" />
</shape>

现在我在这里android:color="#61118"我需要从java类传递值,这可能吗？

如果没有,有没有其他办法？

Answer 1

遗憾的是,您无法将参数传递给XML Drawables.

如果您没有太多不同的值,则可以使用a <level-list>并提供不同版本的形状.

然后,您将更改与drawable关联的级别以使用更改颜色Drawable.setLevel(int).

my_drawable.xml

<level-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:maxLevel="0">
        <shape android:shape="oval">
            <solid android:color="@color/red"/>
            <stroke android:width="1sp" android:color="@color/border" />
        </shape>
    </item>
    <item android:maxLevel="1">
        <shape android:shape="oval">
            <solid android:color="@color/green"/>
            <stroke android:width="1sp" android:color="@color/border" />
        </shape>
    </item>
    <item android:maxLevel="2">
        <shape android:shape="oval">
            <solid android:color="@color/blue"/>
            <stroke android:width="1sp" android:color="@color/blue" />
        </shape>
    </item>
</level-list>

MyActivity.java

// myView is a View (or a subclass of View) 
// with background set to R.drawable.my_drawable
myView.getBackground().setLevel(0); // Set color to red
myView.getBackground().setLevel(1); // Set color to green
myView.getBackground().setLevel(2); // Set color to blue

// myImageView is an ImageView with its source
// set to R.drawable.my_drawable
myImageView.setImageLevel(0); // Set color to red
myImageView.setImageLevel(1); // Set color to green
myImageView.setImageLevel(2); // Set color to blue