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
   6 import java.io.File;
   7 import java.io.FileOutputStream;
   8 import java.io.IOException;
   9
  10 import be.nikiroo.utils.Image;
  11 import be.nikiroo.utils.ImageUtils;
  12
  13 /**
  14  * This class offer some utilities based around images and uses the Android
  15  * framework.
  16  *
  17  * @author niki
  18  */
  19 public class ImageUtilsAndroid extends ImageUtils {
  20         @Override
  21         public void saveAsImage(Image img, File target, String format)
  22                         throws IOException {
  23                 FileOutputStream fos = new FileOutputStream(target);
  24                 try {
  25                         Bitmap image = fromImage(img);
  26
  27                         boolean ok = false;
  28                         try {
  29                                 ok = image.compress(
  30                                                 Bitmap.CompressFormat.valueOf(format.toUpperCase()),
  31                                                 90, fos);
  32                         } catch (Exception e) {
  33                                 ok = false;
  34                         }
  35
  36                         // Some formats are not reliable
  37                         // Second change: PNG
  38                         if (!ok && !format.equals("png")) {
  39                                 ok = image.compress(Bitmap.CompressFormat.PNG, 90, fos);
  40                         }
  41
  42                         if (!ok) {
  43                                 throw new IOException(
  44                                                 "Cannot find a writer for this image and format: "
  45                                                                 + format);
  46                         }
  47                 } catch (IOException e) {
  48                         throw new IOException("Cannot write image to " + target, e);
  49                 } finally {
  50                         fos.close();
  51                 }
  52         }
  53
  54         /**
  55          * Convert the given {@link Image} into a {@link Bitmap} object.
  56          *
  57          * @param img
  58          *            the {@link Image}
  59          * @return the {@link Image} object
  60          * @throws IOException
  61          *             in case of IO error
  62          */
  63         static public Bitmap fromImage(Image img) throws IOException {
  64                 Bitmap image = BitmapFactory.decodeByteArray(img.getData(), 0,
  65                                 img.getData().length);
  66                 if (image == null) {
  67                         int size = img.getData().length;
  68                         String ssize = size + " byte";
  69                         if (size > 1) {
  70                                 ssize = size + " bytes";
  71                                 if (size >= 1000) {
  72                                         size = size / 1000;
  73                                         ssize = size + " kb";
  74                                         if (size > 1000) {
  75                                                 size = size / 1000;
  76                                                 ssize = size + " MB";
  77                                         }
  78                                 }
  79                         }
  80
  81                         throw new IOException(
  82                                         "Failed to convert input to image, size was: " + ssize);
  83                 }
  84
  85                 return image;
  86         }
  87 }