diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index 15c441932..8f43dce95 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -26,8 +26,8 @@ import com.android.inputmethod.keyboard.internal.BogusMoveEventDetector;
 import com.android.inputmethod.keyboard.internal.GestureEnabler;
 import com.android.inputmethod.keyboard.internal.GestureStroke;
 import com.android.inputmethod.keyboard.internal.GestureStrokeParams;
+import com.android.inputmethod.keyboard.internal.GestureStrokePreviewParams;
 import com.android.inputmethod.keyboard.internal.GestureStrokeWithPreviewPoints;
-import com.android.inputmethod.keyboard.internal.GestureStrokeWithPreviewPoints.GestureStrokePreviewParams;
 import com.android.inputmethod.keyboard.internal.PointerTrackerQueue;
 import com.android.inputmethod.keyboard.internal.TypingTimeRecorder;
 import com.android.inputmethod.latin.Constants;
diff --git a/java/src/com/android/inputmethod/keyboard/internal/GestureStrokePreviewParams.java b/java/src/com/android/inputmethod/keyboard/internal/GestureStrokePreviewParams.java
new file mode 100644
index 000000000..6695476e1
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/GestureStrokePreviewParams.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard.internal;
+
+import android.content.res.TypedArray;
+
+import com.android.inputmethod.latin.R;
+
+public final class GestureStrokePreviewParams {
+    public final double mMinSamplingDistance; // in pixel
+    public final double mMaxInterpolationAngularThreshold; // in radian
+    public final double mMaxInterpolationDistanceThreshold; // in pixel
+    public final int mMaxInterpolationSegments;
+
+    private static final float DEFAULT_MIN_SAMPLING_DISTANCE = 0.0f; // dp
+    private static final int DEFAULT_MAX_INTERPOLATION_ANGULAR_THRESHOLD = 15; // in degree
+    private static final float DEFAULT_MAX_INTERPOLATION_DISTANCE_THRESHOLD = 0.0f; // dp
+    private static final int DEFAULT_MAX_INTERPOLATION_SEGMENTS = 4;
+
+    public GestureStrokePreviewParams(final TypedArray mainKeyboardViewAttr) {
+        mMinSamplingDistance = mainKeyboardViewAttr.getDimension(
+                R.styleable.MainKeyboardView_gestureTrailMinSamplingDistance,
+                DEFAULT_MIN_SAMPLING_DISTANCE);
+        final int interpolationAngularDegree = mainKeyboardViewAttr.getInteger(R.styleable
+                .MainKeyboardView_gestureTrailMaxInterpolationAngularThreshold, 0);
+        mMaxInterpolationAngularThreshold = (interpolationAngularDegree <= 0)
+                ? Math.toRadians(DEFAULT_MAX_INTERPOLATION_ANGULAR_THRESHOLD)
+                : Math.toRadians(interpolationAngularDegree);
+        mMaxInterpolationDistanceThreshold = mainKeyboardViewAttr.getDimension(R.styleable
+                .MainKeyboardView_gestureTrailMaxInterpolationDistanceThreshold,
+                DEFAULT_MAX_INTERPOLATION_DISTANCE_THRESHOLD);
+        mMaxInterpolationSegments = mainKeyboardViewAttr.getInteger(
+                R.styleable.MainKeyboardView_gestureTrailMaxInterpolationSegments,
+                DEFAULT_MAX_INTERPOLATION_SEGMENTS);
+    }
+}
diff --git a/java/src/com/android/inputmethod/keyboard/internal/GestureStrokeWithPreviewPoints.java b/java/src/com/android/inputmethod/keyboard/internal/GestureStrokeWithPreviewPoints.java
index 9ce204393..22407d8af 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/GestureStrokeWithPreviewPoints.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/GestureStrokeWithPreviewPoints.java
@@ -16,9 +16,6 @@
 
 package com.android.inputmethod.keyboard.internal;
 
-import android.content.res.TypedArray;
-
-import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.utils.ResizableIntArray;
 
 public final class GestureStrokeWithPreviewPoints extends GestureStroke {
@@ -39,39 +36,6 @@ public final class GestureStrokeWithPreviewPoints extends GestureStroke {
     private int mLastY;
     private double mDistanceFromLastSample;
 
-    public static final class GestureStrokePreviewParams {
-        public final double mMinSamplingDistance; // in pixel
-        public final double mMaxInterpolationAngularThreshold; // in radian
-        public final double mMaxInterpolationDistanceThreshold; // in pixel
-        public final int mMaxInterpolationSegments;
-
-        private static final float DEFAULT_MIN_SAMPLING_DISTANCE = 0.0f; // dp
-        private static final int DEFAULT_MAX_INTERPOLATION_ANGULAR_THRESHOLD = 15; // in degree
-        private static final float DEFAULT_MAX_INTERPOLATION_DISTANCE_THRESHOLD = 0.0f; // dp
-        private static final int DEFAULT_MAX_INTERPOLATION_SEGMENTS = 4;
-
-        private static double degreeToRadian(final int degree) {
-            return degree / 180.0d * Math.PI;
-        }
-
-        public GestureStrokePreviewParams(final TypedArray mainKeyboardViewAttr) {
-            mMinSamplingDistance = mainKeyboardViewAttr.getDimension(
-                    R.styleable.MainKeyboardView_gestureTrailMinSamplingDistance,
-                    DEFAULT_MIN_SAMPLING_DISTANCE);
-            final int interpolationAngularDegree = mainKeyboardViewAttr.getInteger(R.styleable
-                    .MainKeyboardView_gestureTrailMaxInterpolationAngularThreshold, 0);
-            mMaxInterpolationAngularThreshold = (interpolationAngularDegree <= 0)
-                    ? degreeToRadian(DEFAULT_MAX_INTERPOLATION_ANGULAR_THRESHOLD)
-                    : degreeToRadian(interpolationAngularDegree);
-            mMaxInterpolationDistanceThreshold = mainKeyboardViewAttr.getDimension(R.styleable
-                    .MainKeyboardView_gestureTrailMaxInterpolationDistanceThreshold,
-                    DEFAULT_MAX_INTERPOLATION_DISTANCE_THRESHOLD);
-            mMaxInterpolationSegments = mainKeyboardViewAttr.getInteger(
-                    R.styleable.MainKeyboardView_gestureTrailMaxInterpolationSegments,
-                    DEFAULT_MAX_INTERPOLATION_SEGMENTS);
-        }
-    }
-
     public GestureStrokeWithPreviewPoints(final int pointerId,
             final GestureStrokeParams strokeParams,
             final GestureStrokePreviewParams previewParams) {