step15.java

private static final float PREFERRED_WIDTH = 250;
private static final float PREFERRED_HEIGHT = 250;

public static Bitmap resizeBitmap(Bitmap bitmap) {
  int width = bitmap.getWidth();
  int height = bitmap.getHeight();

  float scaleWidth = PREFERRED_WIDTH / width;
  float scaleHeight = PREFERRED_HEIGHT / height;

  Matrix matrix = new Matrix();
  matrix.postScale(scaleWidth, scaleHeight);

  Bitmap resizedBitmap = Bitmap.createBitmap(
        bitmap, 0, 0, width, height, matrix, false);

  bitmap.recycle();
  return resizedBitmap;
}