public class

LayerDrawable

extends Drawable
implements Drawable.Callback

java.lang.Object   ↳android.graphics.drawable.Drawable    ↳android.graphics.drawable.LayerDrawableKnown Direct Subclasses

RippleDrawable, TransitionDrawable

对应的xml标签layer-list

表示Drawable是一层一层叠加在一起的。

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android" >    <!-- outer circle -->    <item>        <shape android:shape="oval">            <solid android:color="#FFACB8C3" />        </shape>    </item>    <!-- inner shadow of outer circle -->    <item        android:bottom="2dp"        android:left="2dp"        android:right="2dp"        android:top="2dp">        <shape android:shape="oval" >            <solid android:color="#FFbdcad6" />        </shape>    </item>    <item        android:bottom="3dp"        android:left="3dp"        android:right="3dp"        android:top="3dp">        <shape android:shape="oval" >            <solid android:color="#FFc3cfd9" />        </shape>    </item>    <item        android:bottom="4dp"        android:left="4dp"        android:right="4dp"        android:top="4dp">        <shape android:shape="oval" >            <solid android:color="#FFcbd6df" />        </shape>    </item>    <item        android:bottom="5dp"        android:left="5dp"        android:right="5dp"        android:top="5dp">        <shape android:shape="oval" >            <solid android:color="#FFd4dee5" />        </shape>    </item>    <!-- gap -->    <item        android:bottom="6dp"        android:left="6dp"        android:right="6dp"        android:top="6dp">        <shape android:shape="oval" >            <solid android:color="#FFdae2e8" />        </shape>    </item>    <!-- outer shadow of center circle -->    <item        android:bottom="10dp"        android:left="10dp"        android:right="10dp"        android:top="10dp">        <shape android:shape="oval" >            <solid android:color="#FFced5dc" />        </shape>    </item>    <item        android:bottom="12dp"        android:left="12dp"        android:right="12dp"        android:top="12dp">        <shape android:shape="oval" >            <solid android:color="#FFbcc4c9" />        </shape>    </item>    <item        android:bottom="13dp"        android:left="13dp"        android:right="13dp"        android:top="13dp">        <shape android:shape="oval" >            <solid android:color="#FFb4bbc0" />        </shape>    </item>    <item        android:bottom="14dp"        android:left="14dp"        android:right="14dp"        android:top="14dp">        <shape android:shape="oval" >            <solid android:color="#FFacb3b8" />        </shape>    </item>    <!-- center circle -->    <item        android:bottom="15dp"        android:left="15dp"        android:right="15dp"        android:top="15dp">        <shape android:shape="oval" >            <stroke                android:width="1dp"                android:color="#FFFCFCFC" />            <gradient                android:angle="270"                android:endColor="#FFCFD7DD"                android:startColor="#FFF0F5F9" />        </shape>    </item></layer-list>

也可以用代码实现

构造函数

 public LayerDrawable(Drawable[] layers)

layers表示图层

还有个方法

  public void setLayerInset(int index, int l, int t, int r, int b)

index表示在图层的第几个位置

 int l, int t, int r, int b就跟

        android:bottom=""
        android:left=""
        android:right=""
        android:top=""

是一样的。

        Drawable[] drawables = new Drawable[3];drawables[0] = new ColorDrawable(0xffff4653);drawables[1] = new ColorDrawable(0xffa5ff34);drawables[2] = new ColorDrawable(0xff11a1ff);LayerDrawable layer = new LayerDrawable(drawables);layer.setLayerInset(0, 50, 50, 0, 0);layer.setLayerInset(1, 100, 100, 0, 0);layer.setLayerInset(2, 150, 150, 150, 150);image.setBackground(layer);

参考：http://blog.csdn.net/evn512457/article/details/20467509