custom dialog with close button

might be below code is useful for you,achieved like this

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical"
    android:gravity="center"
    android:orientation="vertical" >

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" >

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:layout_marginTop="10dp"
            android:background="@drawable/popup_password_latest"
            android:gravity="center"
            android:orientation="vertical"
            android:paddingBottom="-50dp" >

          <!---add your views here-->
        </LinearLayout>

        <ImageView
            android:id="@+id/imageView_close"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="top|right"
            android:clickable="true"
            android:src="https://stackoverflow.com/questions/20258730/@drawable/close_selector" />
    </FrameLayout>

</LinearLayout>