Android - ImageView overlay another ImageView

Question

I would like to make an ImageView overlay another ImageView like this; only half of the circle green is overlaying the image:

I have tried using RelativeLayout and put both ImageView inside. Then I overlay the circle over the image by using android:layout_alignBottom. It did overlay the but I have no idea how to set the offset so that only half of the circle is overlaying the base image.

EDIT:

Sorry, here is my layout xml code

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginBottom="32sp" >
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_person_black"
            android:adjustViewBounds="true"
            android:id="@+id/image_view_product" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@id/image_view_product"
            android:layout_centerHorizontal="true"
            android:background="@drawable/image_view_circle"
            android:src="@drawable/ic_circle" />

</RelativeLayout>

Answer 1

I would recommend Constraintlayout as it gives excellent control over the positioning of individual view items. Sample based on your example below

<android.support.constraint.ConstraintLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:id="@+id/parentLayout">
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_person_black"
        android:adjustViewBounds="true"
        android:id="@+id/image_view_product"/>

    <View
        android:layout_width="50dp"
        android:layout_height="50dp"
        app:layout_constraintTop_toBottomOf="@+id/image_view_product"/>

    <ImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_alignBottom="@id/image_view_product"
        android:layout_centerHorizontal="true"
        android:background="@drawable/circle"
        android:src="@drawable/ic_add_circle_green_24dp"

        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

</android.support.constraint.ConstraintLayout>