src/be/nikiroo/utils/android/ImageUtilsAndroid.java

   1 package be.nikiroo.utils.android;
   2
   3 import android.graphics.Bitmap;
   4 import android.graphics.BitmapFactory;
   5 import be.nikiroo.utils.Image;
   6 import be.nikiroo.utils.ImageUtils;
   7
   8 import java.io.File;
   9 import java.io.FileOutputStream;
  10 import java.io.IOException;
  11
  12 /**
  13  * This class offer some utilities based around images and uses the Android framework.
  14  *
  15  * @author niki
  16  */
  17 public class ImageUtilsAndroid extends ImageUtils {
  18         @Override
  19         public void saveAsImage(Image img, File target, String format)
  20                         throws IOException {
  21                 FileOutputStream fos = new FileOutputStream(target);
  22                 try {
  23                         Bitmap image = fromImage(img);
  24
  25                         boolean ok = false;
  26                         try {
  27                                 ok = image.compress(
  28                                                 Bitmap.CompressFormat.valueOf(format.toUpperCase()),
  29                                                 90, fos);
  30                         } catch (Exception e) {
  31                                 ok = false;
  32                         }
  33
  34                         // Some formats are not reliable
  35                         // Second change: PNG
  36                         if (!ok && !format.equals("png")) {
  37                                 ok = image.compress(Bitmap.CompressFormat.PNG, 90, fos);
  38                         }
  39
  40                         if (!ok) {
  41                                 throw new IOException(
  42                                                 "Cannot find a writer for this image and format: "
  43                                                                 + format);
  44                         }
  45                 } catch (IOException e) {
  46                         throw new IOException("Cannot write image to " + target, e);
  47                 } finally {
  48                         fos.close();
  49                 }
  50         }
  51
  52         /**
  53          * Convert the given {@link Image} into a {@link Bitmap} object.
  54          *
  55          * @param img
  56          *            the {@link Image}
  57          * @return the {@link Image} object
  58          * @throws IOException
  59          *             in case of IO error
  60          */
  61         static public Bitmap fromImage(Image img) throws IOException {
  62                 Bitmap image = BitmapFactory.decodeByteArray(img.getData(), 0,
  63                                 img.getData().length);
  64                 if (image == null) {
  65                         throw new IOException("Failed to convert input to image");
  66                 }
  67
  68                 return image;
  69         }
  70 }