diff --git a/frameanimation/src/main/java/com/github/penfeizhou/animation/FrameAnimationDrawable.java b/frameanimation/src/main/java/com/github/penfeizhou/animation/FrameAnimationDrawable.java
index ecf91c5b..08b3d80a 100644
--- a/frameanimation/src/main/java/com/github/penfeizhou/animation/FrameAnimationDrawable.java
+++ b/frameanimation/src/main/java/com/github/penfeizhou/animation/FrameAnimationDrawable.java
@@ -183,15 +183,15 @@ public void draw(Canvas canvas) {
     @Override
     public void setBounds(int left, int top, int right, int bottom) {
         super.setBounds(left, top, right, bottom);
-        boolean sampleSizeChanged = frameSeqDecoder.setDesiredSize(getBounds().width(), getBounds().height());
+        int oldSampleSize = frameSeqDecoder.getSampleSize();
+        int sampleSize = frameSeqDecoder.setDesiredSize(getBounds().width(), getBounds().height());
         matrix.setScale(
-                1.0f * getBounds().width() * frameSeqDecoder.getSampleSize() / frameSeqDecoder.getBounds().width(),
-                1.0f * getBounds().height() * frameSeqDecoder.getSampleSize() / frameSeqDecoder.getBounds().height());
-
-        if (sampleSizeChanged)
+                1.0f * getBounds().width() * sampleSize / frameSeqDecoder.getBounds().width(),
+                1.0f * getBounds().height() * sampleSize / frameSeqDecoder.getBounds().height());
+        if (sampleSize != oldSampleSize)
             this.bitmap = Bitmap.createBitmap(
-                    frameSeqDecoder.getBounds().width() / frameSeqDecoder.getSampleSize(),
-                    frameSeqDecoder.getBounds().height() / frameSeqDecoder.getSampleSize(),
+                    frameSeqDecoder.getBounds().width() / sampleSize,
+                    frameSeqDecoder.getBounds().height() / sampleSize,
                     Bitmap.Config.ARGB_8888);
     }
 
diff --git a/frameanimation/src/main/java/com/github/penfeizhou/animation/decode/FrameSeqDecoder.java b/frameanimation/src/main/java/com/github/penfeizhou/animation/decode/FrameSeqDecoder.java
index c97bd232..d7189c06 100644
--- a/frameanimation/src/main/java/com/github/penfeizhou/animation/decode/FrameSeqDecoder.java
+++ b/frameanimation/src/main/java/com/github/penfeizhou/animation/decode/FrameSeqDecoder.java
@@ -435,11 +435,9 @@ public int getSampleSize() {
         return sampleSize;
     }
 
-    public boolean setDesiredSize(int width, int height) {
-        boolean sampleSizeChanged = false;
+    public int setDesiredSize(int width, int height) {
         final int sample = getDesiredSample(width, height);
         if (sample != getSampleSize()) {
-            sampleSizeChanged = true;
             final boolean tempRunning = isRunning();
             workerHandler.removeCallbacks(renderTask);
             workerHandler.post(new Runnable() {
@@ -458,7 +456,7 @@ public void run() {
                 }
             });
         }
-        return sampleSizeChanged;
+        return sample;
     }
 
     protected int getDesiredSample(int desiredWidth, int desiredHeight) {