Bitmap OOM and rotation fixes

// FREEBIE

src/com/android/gallery3d/data/Exif.java

@@ -153,7 +153,16 @@ public class Exif {
 
     private static boolean read(InputStream is, byte[] buf, int length) {
         try {
-            return is.read(buf, 0, length) == length;
+            int read;
+            int totalRead = 0;
+            while (totalRead != length) {
+                if ((read = is.read(buf, totalRead, length - totalRead)) < 0) {
+                  Log.w(TAG, "stream EOF'd prematurely");
+                  return false;
+                }
+                totalRead += read;
+            }
+          return true;
         } catch (IOException ex) {
             return false;
         }

src/org/thoughtcrime/securesms/jobs/ThumbnailGenerateJob.java

@@ -32,6 +32,7 @@ import org.thoughtcrime.securesms.sms.OutgoingKeyExchangeMessage;
 import org.thoughtcrime.securesms.util.BitmapDecodingException;
 import org.thoughtcrime.securesms.util.BitmapUtil;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
+import org.thoughtcrime.securesms.util.Util;
 import org.whispersystems.jobqueue.JobParameters;
 import org.whispersystems.libaxolotl.DuplicateMessageException;
 import org.whispersystems.libaxolotl.InvalidMessageException;
@@ -99,7 +100,7 @@ public class ThumbnailGenerateJob extends MasterSecretJob {
   }
 
   private Bitmap generateThumbnailForPart(MasterSecret masterSecret, PduPart part) {
-    String contentType = new String(part.getContentType());
+    String contentType = Util.toIsoString(part.getContentType());
 
     if      (ContentType.isImageType(contentType)) return generateImageThumbnail(masterSecret, part);
     else                                           return null;
@@ -109,7 +110,7 @@ public class ThumbnailGenerateJob extends MasterSecretJob {
     try {
       int maxSize = context.getResources().getDimensionPixelSize(R.dimen.thumbnail_max_size);
       return BitmapUtil.createScaledBitmap(context, masterSecret, part.getDataUri(), maxSize, maxSize);
-    } catch (FileNotFoundException | BitmapDecodingException e) {
+    } catch (FileNotFoundException | BitmapDecodingException | OutOfMemoryError e) {
       Log.w(TAG, e);
       return null;
     }

src/org/thoughtcrime/securesms/util/BitmapUtil.java

@@ -68,7 +68,15 @@ public class BitmapUtil {
   public static Bitmap createScaledBitmap(Context context, MasterSecret masterSecret, Uri uri, int maxWidth, int maxHeight)
       throws BitmapDecodingException, FileNotFoundException
   {
-    return createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, false);
+    Bitmap bitmap;
+    try {
+      bitmap = createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, false);
+    } catch(OutOfMemoryError oome) {
+      Log.w(TAG, "OutOfMemoryError when scaling precisely, doing rough scale to save memory instead");
+      bitmap = createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, true);
+    }
+
+    return bitmap;
   }
 
   private static Bitmap createScaledBitmap(Context context, MasterSecret masterSecret, Uri uri, int maxWidth, int maxHeight, boolean constrainedMemory)