A circle shape with a check mark in it. A layerlist of shapes.

check_circle_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- border circle -->
    <item
        android:width="50dp"
        android:height="50dp"
        tools:ignore="UnusedAttribute">
        <shape android:shape="rectangle">
            <solid android:color="@android:color/black"/>
            <corners android:radius="40dp" />
            <stroke
                android:width="2dp"
                android:color="@android:color/holo_green_dark" />

        </shape>
    </item>

    <!-- left line -->
    <item
        android:width="20dp"
        android:height="3dp"
        android:top="29dp"
        android:left="6.5dp"
        tools:ignore="UnusedAttribute">
        <rotate
            android:fromDegrees="45">
            <shape android:shape="rectangle">
                <solid android:color="@android:color/holo_green_dark"/>
            </shape>
        </rotate>
    </item>

    <!-- right line -->
    <item
        android:width="30dp"
        android:height="3dp"
        android:top="26dp"
        android:left="17.5dp"
        tools:ignore="UnusedAttribute">
        <rotate
            android:fromDegrees="-45">
            <shape android:shape="rectangle">
                <solid android:color="@android:color/holo_green_dark"/>
            </shape>
        </rotate>
    </item>

</layer-list>