If you want to show an image within a shape, Try this,
shape.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="@color/colorPrimaryDark"/>
    <corners android:bottomLeftRadius="56dp"/>
</shape>
Now set the shape for a layout, then add the image that you want in image view then adjust the alpha value to show both shape and image,
layout.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="120dp"
    android:background="@drawable/shape">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/blue_image"      
        android:alpha=".2"/>
</RelativeLayout>
Output will be like this
Hope this will help.