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authorsteckbrief <steckbrief@chefmail.de>2015-12-16 00:53:04 +0100
committersteckbrief <steckbrief@chefmail.de>2015-12-16 00:53:04 +0100
commitc26335f3e366110366eb89025a42875bcb7840a9 (patch)
treef6ae254a0bf0a8ce2d9e43efd48a5eba6e454b4f /src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
parent556697c47e74766215c17fb5f721d71494a02643 (diff)
Implements FS#19, FS#84; Introduces ImageResizeException, MessageUtil and distinguishes between image resizing and compressing/saving
Diffstat (limited to 'src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java')
-rw-r--r--src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java60
1 files changed, 60 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
index 7e8cacd0..9250c432 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
@@ -11,17 +11,24 @@ import android.util.LruCache;
import java.io.File;
import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.exceptions.FileCopyException;
+import de.thedevstack.conversationsplus.exceptions.ImageResizeException;
import de.thedevstack.conversationsplus.persistance.FileBackend;
/**
* This util provides
*/
public final class ImageUtil {
+
+ private static int IMAGE_SIZE = 1920;
private static LruCache<String, Bitmap> BITMAP_CACHE;
/**
@@ -104,6 +111,59 @@ public final class ImageUtil {
}
/**
+ * Resizes and rotates an image given by uri and returns the bitmap.
+ * @param image the uri of the image to be resized and rotated
+ * @return resized and rotated bitmap
+ * @throws ImageResizeException
+ */
+ public static Bitmap resizeAndRotateImage(Uri image) throws ImageResizeException {
+ return ImageUtil.resizeAndRotateImage(image, 0);
+ }
+
+ /**
+ * Resizes and rotates an image given by uri and returns the bitmap.
+ * @param image the uri of the image to be resized and rotated
+ * @return resized and rotated bitmap
+ * @throws ImageResizeException
+ */
+ private static Bitmap resizeAndRotateImage(Uri image, int sampleSize) throws ImageResizeException {
+ InputStream imageInputStream = null;
+ try {
+ imageInputStream = StreamUtil.openInputStreamFromContentResolver(image);
+ Bitmap originalBitmap;
+ BitmapFactory.Options options = new BitmapFactory.Options();
+ int inSampleSize = (int) Math.pow(2, sampleSize);
+ Logging.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
+ options.inSampleSize = inSampleSize;
+ originalBitmap = BitmapFactory.decodeStream(imageInputStream, null, options);
+ imageInputStream.close();
+ if (originalBitmap == null) {
+ throw new ImageResizeException(R.string.error_not_an_image_file);
+ }
+ Bitmap scaledBitmap = ImageUtil.resize(originalBitmap, IMAGE_SIZE);
+ int rotation = ImageUtil.getRotation(image);
+ if (rotation > 0) {
+ scaledBitmap = ImageUtil.rotate(scaledBitmap, rotation);
+ }
+
+ return scaledBitmap;
+ } catch (FileNotFoundException e) {
+ throw new ImageResizeException(R.string.error_file_not_found);
+ } catch (IOException e) {
+ throw new ImageResizeException(R.string.error_io_exception);
+ } catch (OutOfMemoryError e) {
+ ++sampleSize;
+ if (sampleSize <= 3) {
+ return resizeAndRotateImage(image, sampleSize);
+ } else {
+ throw new ImageResizeException(R.string.error_out_of_memory);
+ }
+ } finally {
+ StreamUtil.close(imageInputStream);
+ }
+ }
+
+ /**
* Returns the rotation from the exif information of an image identified with the given uri.
* The orientation is retrieved by parsing the stream of the image.
* FileNotFoundException is silently ignored.