<ImageView
android:id="@+id/zhongjie"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/popwindow_zhongjie"
android:scaleType="centerInside"
android:src="@drawable/mark_caller_house_agent" /> 

<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval"
android:useLevel="false">
<solid android:color="#66CC00"/>
<size android:width="50dp"
android:height="50dp"/>
</shape>