diff --git a/src/com/loopj/android/image/SmartImage.java b/src/com/loopj/android/image/SmartImage.java
index 12e0749..7c0e60a 100644
--- a/src/com/loopj/android/image/SmartImage.java
+++ b/src/com/loopj/android/image/SmartImage.java
@@ -4,5 +4,6 @@
 import android.graphics.Bitmap;
 
 public interface SmartImage {
+    // 是一个接口
     public Bitmap getBitmap(Context context);
 }
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