To add a text to your ImageView
you can do this:
<RelativeLayout> // Only works inside a RelativeLayout
<ImageView
android:id="@+id/myImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="https://stackoverflow.com/questions/3404582/@drawable/myImageSouce" />
<TextView
android:id="@+id/myImageViewText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/myImageView"
android:layout_alignTop="@+id/myImageView"
android:layout_alignRight="@+id/myImageView"
android:layout_alignBottom="@+id/myImageView"
android:layout_margin="1dp"
android:gravity="center"
android:text="Hello"
android:textColor="#000000" />
</RelativeLayout>