我用drawable创建了聊天气泡,看起来不错,现在我想在drawable下方添加阴影效果,使其产生3d效果。我不想使用9-pitch图像。我只想知道如何在这个drawable上添加阴影效果。我的代码是
----right_bubble_chat_drawable
<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="15dp" />
<solid android:color="@color/chatrightbubbleColor" />
<padding
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp" />
<size
android:height="@dimen/normal_button_height"
android:width="@dimen/normal_button_width" />
--- 对于角指针'chat_laftarraow'
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item >
<rotate
android:fromDegrees="90"
android:toDegrees="-90"
android:pivotX="50%"
android:pivotY="50%" >
<rotate
android:fromDegrees="45"
android:toDegrees="45"
android:pivotX="-40%"
android:pivotY="86%" >
<shape
android:shape="rectangle" >
<stroke android:color="#00aaef" android:width="1dp"/>
<solid
android:color="#00aaef" />
</shape>
</rotate>
</rotate>
</item>
</layer-list>
--------我正在使用它们
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<View
android:id="@+id/left_chatArror"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_marginTop="6dp"
android:background="@drawable/chat_laftarraow"/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="220dp"
android:layout_marginRight="-3dp"
android:orientation="horizontal"
android:layout_toLeftOf="@+id/left_chatArror"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:background="@drawable/right_bubble_chat_drawable">
</RelativeLayout>
</RelativeLayout>
请建议我如何在气泡下方添加阴影效果,如下图所示