Android :: Any Way To Get Icon Back From Media Store?

I've figured out how to get the camera to work. It's taking a 1/4 resolution picture and I'm putting it into the gallery. Next, I want to create a small icon of that picture to put on a button. I've seen several examples and the code below is what I've been trying:

showMessage("Next Step is cropping - Waiting ...");
logDebug("Sending URI " + mOutputFileUri);
// now we want to grab a lower res version for the button.
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setClassName ("com.android.camera","com.android.camera.CropImage");
cropIntent.setData(mOutputFileUri); //cropIntent.setData(intent.getData());
cropIntent.putExtra("noFaceDetection", true); cropIntent.putExtra("outputX", ICON_SIZE);
cropIntent.putExtra("outputY", ICON_SIZE); cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1); cropIntent.putExtra("scale", true);
cropIntent.putExtra("return-data", true);
startActivityForResult(cropIntent, CROP_FROM_CAMERA);

But, this blows up with a null pointer exception. I also get a warning in the log message stream saying the image file isn't finished writing. I've based my code on this:
http://stackoverflow.com/questions/1973359/android-crop-an-image-afte...
Also, when it tries to delete the temporary file, there is an error because I don't have permission. This smells like I'm just missing something important. Is there any other way to get an icon of the image?