--- /dev/null
+package be.nikiroo.utils.android;
+
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.Config;
+import android.graphics.BitmapFactory;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.stream.Stream;
+
+import be.nikiroo.utils.Image;
+import be.nikiroo.utils.ImageUtils;
+import be.nikiroo.utils.StringUtils;
+
+/**
+ * This class offer some utilities based around images and uses the Android
+ * framework.
+ *
+ * @author niki
+ */
+public class ImageUtilsAndroid extends ImageUtils {
+ @Override
+ protected boolean check() {
+ // If we can get the class, it means we have access to it
+ Config c = Config.ALPHA_8;
+ return true;
+ }
+
+ @Override
+ public void saveAsImage(Image img, File target, String format)
+ throws IOException {
+ FileOutputStream fos = new FileOutputStream(target);
+ try {
+ Bitmap image = fromImage(img);
+
+ boolean ok = false;
+ try {
+ ok = image.compress(
+ Bitmap.CompressFormat.valueOf(format.toUpperCase()),
+ 90, fos);
+ } catch (Exception e) {
+ ok = false;
+ }
+
+ // Some formats are not reliable
+ // Second chance: PNG
+ if (!ok && !format.equals("png")) {
+ ok = image.compress(Bitmap.CompressFormat.PNG, 90, fos);
+ }
+
+ if (!ok) {
+ throw new IOException(
+ "Cannot find a writer for this image and format: "
+ + format);
+ }
+ } catch (IOException e) {
+ throw new IOException("Cannot write image to " + target, e);
+ } finally {
+ fos.close();
+ }
+ }
+
+ /**
+ * Convert the given {@link Image} into a {@link Bitmap} object.
+ *
+ * @param img
+ * the {@link Image}
+ * @return the {@link Image} object
+ * @throws IOException
+ * in case of IO error
+ */
+ static public Bitmap fromImage(Image img) throws IOException {
+ InputStream stream = img.newInputStream();
+ try {
+ Bitmap image = BitmapFactory.decodeStream(stream);
+ if (image == null) {
+ String extra = "";
+ if (img.getSize() <= 2048) {
+ try {
+ extra = ", content: "
+ + new String(img.getData(), "UTF-8");
+ } catch (Exception e) {
+ extra = ", content unavailable";
+ }
+ }
+ String ssize = StringUtils.formatNumber(img.getSize());
+ throw new IOException(
+ "Failed to convert input to image, size was: " + ssize
+ + extra);
+ }
+
+ return image;
+ } finally {
+ stream.close();
+ }
+ }
+}