Improve detail scene

app/src/main/java/com/hippo/animation/DurationInterpolator.java

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+/*
+ * Copyright 2015 Hippo Seven
+ *
+ * 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.hippo.animation;
+
+import android.animation.TimeInterpolator;
+
+public class DurationInterpolator implements TimeInterpolator {
+
+    private float mDuration;
+
+    public DurationInterpolator(float duration) {
+        mDuration = duration;
+    }
+
+    @Override
+    public float getInterpolation(float input) {
+        if (input > mDuration) {
+            return (input - mDuration) / (1 - mDuration);
+        } else {
+            return 0f;
+        }
+    }
+}