如何在Android中以编程方式修改图层列表？

看一下,LayerDrawable因为它是从您的XML创建的并在运行时使用.

例:

my_drawable.xml:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/gradientDrawble">
        <shape android:shape="rectangle" >
            <gradient
                android:endColor="#897343"
                android:startColor="#345456" />
            <corners android:radius="15dp" />
        </shape>
    </item>

在运行时修改:

LayerDrawable layerDrawable = (LayerDrawable) getResources()
    .getDrawable(R.drawable.my_drawable);
GradientDrawable gradientDrawable = (GradientDrawable) layerDrawable
    .findDrawableByLayerId(R.id.gradientDrawble);
gradientDrawable.setCornerRadius(50);