Android: Images from XML layout to Bitmaps in Code to solve OOM error

问题

I am getting the infamous java.lang.OutOfMemoryError: bitmap size exceeds VM budget error. I have several XML layouts and a lot of the elements have images (button backgrounds, Linear layout backgrounds, etc.) After going through the questions posted, like Strange out of memory issue while loading an image to a Bitmap object and external allocation too large for this process and OutofMemoryError: bitmap size exceeds VM budget (Android) and Android: Error loading images: OutOfMemoryError: bitmap size exceeds VM budget I know I should use the BitMapFactory methods. But all my images are defined in my XML for example,

    <ImageView
        android:layout_width="80dp"
        android:layout_height="20dp"
        android:layout_marginBottom="3dp"
        android:src="@drawable/username" />

How do I go from defining the images in my XML to defining them programatically so that I can try playing around with BitMapFactory in hopes that it will eliminate my OOM exception?

来源：https://stackoverflow.com/questions/11160612/android-images-from-xml-layout-to-bitmaps-in-code-to-solve-oom-error