Workaround for framework NPE on KitKat.

Fixes #148

library/src/main/java/com/bumptech/glide/load/engine/bitmap_recycle/SizeStrategy.java

@@ -3,6 +3,7 @@ package com.bumptech.glide.load.engine.bitmap_recycle;
 import android.annotation.TargetApi;
 import android.graphics.Bitmap;
 import android.os.Build;
+import com.bumptech.glide.util.Util;
 
 import java.util.TreeMap;
 
@@ -19,7 +20,8 @@ class SizeStrategy implements LruPoolStrategy {
 
     @Override
     public void put(Bitmap bitmap) {
-        final Key key = keyPool.get(bitmap.getAllocationByteCount());
+        int size = Util.getSize(bitmap);
+        final Key key = keyPool.get(size);
 
         groupedMap.put(key, bitmap);
 
@@ -52,7 +54,7 @@ class SizeStrategy implements LruPoolStrategy {
     public Bitmap removeLast() {
         Bitmap removed = groupedMap.removeLast();
         if (removed != null) {
-            final int removedSize = removed.getAllocationByteCount();
+            final int removedSize = Util.getSize(removed);
             decrementBitmapOfSize(removedSize);
         }
         return removed;
@@ -79,7 +81,7 @@ class SizeStrategy implements LruPoolStrategy {
 
     @Override
     public int getSize(Bitmap bitmap) {
-        return bitmap.getAllocationByteCount();
+        return Util.getSize(bitmap);
     }
 
     @Override
@@ -97,7 +99,8 @@ class SizeStrategy implements LruPoolStrategy {
     }
 
     private static String getBitmapString(Bitmap bitmap) {
-        return getBitmapString(bitmap.getAllocationByteCount());
+        int size = Util.getSize(bitmap);
+        return getBitmapString(size);
     }
 
     private static String getBitmapString(int size) {

library/src/main/java/com/bumptech/glide/util/Util.java

@@ -40,15 +40,19 @@ public class Util {
     }
 
     /**
-     * Returns the in memory size of the given {@link Bitmap}.
+     * Returns the in memory size of the given {@link Bitmap} in bytes.
      */
     @TargetApi(Build.VERSION_CODES.KITKAT)
     public static int getSize(Bitmap bitmap) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
-            return bitmap.getHeight() * bitmap.getRowBytes();
-        } else {
-            return bitmap.getAllocationByteCount();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+            // Workaround for KitKat initial release NPE in Bitmap, fixed in MR1. See issue #148.
+            try {
+                return bitmap.getAllocationByteCount();
+            } catch (NullPointerException e) {
+                // Do nothing.
+            }
         }
+        return bitmap.getHeight() * bitmap.getRowBytes();
     }
 
     public static void assertMainThread() {