diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorBrightnessView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorBrightnessView.java
index 9b955ef..b2118e0 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorBrightnessView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorBrightnessView.java
@@ -171,7 +171,7 @@
         canvas.drawRect(mBorder, mBorder, mWidth - mBorder, mHeight - mBorder, mBarPaint1);
         canvas.drawLine(mDotX, mDotY, mWidth - mBorder, mDotY, mLinePaint1);
         canvas.drawLine(mBorder, mDotY, mDotX, mDotY, mLinePaint2);
-        if (mDotX != Float.NaN) {
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, mDotRadius, mDotPaint);
         }
     }
diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorHueView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorHueView.java
index 498f5a4..61b3621 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorHueView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorHueView.java
@@ -179,7 +179,7 @@
 
         canvas.drawLine(mDotX, mDotY, mWidth - mBorder, mDotY, mLinePaint1);
         canvas.drawLine(mBorder, mDotY, mDotX, mDotY, mLinePaint2);
-        if (mDotX != Float.NaN) {
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, mDotRadius, mDotPaint);
         }
     }
diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorOpacityView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorOpacityView.java
index ec15b5b..970a2ff 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorOpacityView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorOpacityView.java
@@ -171,7 +171,7 @@
         canvas.drawRect(mBorder, 0, mWidth - mBorder, mHeight, mBarPaint1);
         canvas.drawLine(mDotX, mDotY, mWidth - mBorder, mDotY, mLinePaint1);
         canvas.drawLine(mBorder, mDotY, mDotX, mDotY, mLinePaint2);
-        if (mDotX != Float.NaN) {
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, mDotRadius, mDotPaint);
         }
     }
diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorRectView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorRectView.java
index 07d7c71..92f4ad8 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorRectView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorRectView.java
@@ -170,8 +170,7 @@
         canvas.drawRect(rect, mWheelPaint3);
         canvas.drawRect(rect, mWheelPaint2);
 
-        if (mDotX != Float.NaN) {
-
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, mDotRadus, mDotPaint);
         }
     }
diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorSVRectView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorSVRectView.java
index fb8b4fc..6ebb48b 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorSVRectView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorSVRectView.java
@@ -126,8 +126,7 @@
         mRect.right -= mBorder;
         canvas.drawBitmap(mBitmap, null, mRect, mPaint1);
 
-        if (mDotX != Float.NaN) {
-
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, mDotRadus, mDotPaint);
         }
     }
diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorSaturationView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorSaturationView.java
index af4dfda..a29eee9 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorSaturationView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorSaturationView.java
@@ -170,7 +170,7 @@
         canvas.drawRect(mBorder, mBorder, mWidth - mBorder, mHeight - mBorder, mBarPaint1);
         canvas.drawLine(mDotX, mDotY, mWidth - mBorder, mDotY, mLinePaint1);
         canvas.drawLine(mBorder, mDotY, mDotX, mDotY, mLinePaint2);
-        if (mDotX != Float.NaN) {
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, mDotRadius, mDotPaint);
         }
     }
diff --git a/src/com/android/gallery3d/filtershow/colorpicker/ColorValueView.java b/src/com/android/gallery3d/filtershow/colorpicker/ColorValueView.java
index bbfd829..0ace5d0 100644
--- a/src/com/android/gallery3d/filtershow/colorpicker/ColorValueView.java
+++ b/src/com/android/gallery3d/filtershow/colorpicker/ColorValueView.java
@@ -148,7 +148,7 @@
         canvas.drawRect(mBorder, mBorder, mWidth - mBorder, mHeight - mBorder, mBarPaint1);
         canvas.drawLine(mDotX, mDotY, mDotX, mHeight - mBorder, mLinePaint2);
         canvas.drawLine(mDotX, mBorder, mDotX, mDotY, mLinePaint1);
-        if (mDotX != Float.NaN) {
+        if (!Float.isNaN(mDotX)) {
             canvas.drawCircle(mDotX, mDotY, dotRadus, mDotPaint);
         }
     }