XML : how to set text and image as a hint in edittext in center?

i want to set image and text as hint in Edit text in center like this

my XML code is

  <EditText  android:layout_width="300dp" android:layout_height="40dp"   android:id="@+id/ed_username" android:layout_marginBottom="152dp"   android:hint="@string/username"  android:drawableLeft="@drawable/username_image"   android:textColorHint="@color/skyblue"    android:background="@drawable/edittext_shape"   android:layout_alignParentBottom="true"   android:layout_centerHorizontal="true"   android:ellipsize="start" android:gravity="center|center_horizontal"/>    

please help me thanks in advance a