alert_round

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/transparent"
    android:orientation="vertical">

    <FrameLayout
        android:id="@+id/root_img"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/transparent">

        <View
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_gravity="bottom"
            android:background="@android:color/white"
             />

        <ImageView
            android:id="@+id/img_alert_tick"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_gravity="center"
            android:background="@drawable/shape"
            android:scaleType="fitCenter"
            android:src="@drawable/ic_white_tick" />


    </FrameLayout>


    <TextView
        android:id="@+id/txt_congo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/root_img"
        android:background="@android:color/white"
        android:gravity="center"
        android:paddingBottom="50dp"
        android:paddingTop="50dp"
        android:text="@string/post_enquiry_popup_message"
        android:textSize="17sp" />


</RelativeLayout>

AlertDialog

AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setView(R.layout.round_alert);
AlertDialog dialog = builder.show();
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));