Backport Interpolator in PhoneCommon to enable some animation on Kitkat
am: 216bca2e12
* commit '216bca2e12c63b7146d0a8a400658955c1303aa4':
Backport Interpolator in PhoneCommon to enable some animation on Kitkat
diff --git a/src/com/android/phone/common/animation/AnimUtils.java b/src/com/android/phone/common/animation/AnimUtils.java
index 85c5a59..8124b7b 100644
--- a/src/com/android/phone/common/animation/AnimUtils.java
+++ b/src/com/android/phone/common/animation/AnimUtils.java
@@ -22,7 +22,8 @@
import android.view.View;
import android.view.ViewPropertyAnimator;
import android.view.animation.Interpolator;
-import android.view.animation.PathInterpolator;
+
+import com.android.phone.common.compat.PathInterpolatorCompat;
import java.lang.Float;
@@ -30,9 +31,12 @@
public static final int DEFAULT_DURATION = -1;
public static final int NO_DELAY = 0;
- public static final Interpolator EASE_IN = new PathInterpolator(0.0f, 0.0f, 0.2f, 1.0f);
- public static final Interpolator EASE_OUT = new PathInterpolator(0.4f, 0.0f, 1.0f, 1.0f);
- public static final Interpolator EASE_OUT_EASE_IN = new PathInterpolator(0.4f, 0, 0.2f, 1);
+ public static final Interpolator EASE_IN = PathInterpolatorCompat.create(
+ 0.0f, 0.0f, 0.2f, 1.0f);
+ public static final Interpolator EASE_OUT = PathInterpolatorCompat.create(
+ 0.4f, 0.0f, 1.0f, 1.0f);
+ public static final Interpolator EASE_OUT_EASE_IN = PathInterpolatorCompat.create(
+ 0.4f, 0, 0.2f, 1);
public static class AnimationCallback {
public void onAnimationEnd() {}
diff --git a/src/com/android/phone/common/compat/PathInterpolatorCompat.java b/src/com/android/phone/common/compat/PathInterpolatorCompat.java
new file mode 100644
index 0000000..7697bf3
--- /dev/null
+++ b/src/com/android/phone/common/compat/PathInterpolatorCompat.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2015 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.phone.common.compat;
+
+import android.graphics.Path;
+import android.graphics.PathMeasure;
+import android.view.animation.Interpolator;
+import android.view.animation.PathInterpolator;
+
+import com.android.contacts.common.compat.CompatUtils;
+
+public class PathInterpolatorCompat {
+ public static Interpolator create(float controlX1, float controlY1,
+ float controlX2, float controlY2) {
+ if (CompatUtils.isLollipopCompatible()) {
+ return new PathInterpolator(controlX1, controlY1, controlX2, controlY2);
+ }
+ return new PathInterpolatorBase(controlX1, controlY1, controlX2, controlY2);
+ }
+
+ private static class PathInterpolatorBase implements Interpolator {
+ /**
+ * Governs the accuracy of the approximation of the {@link Path}.
+ */
+ private static final float PRECISION = 0.002f;
+
+ private final float[] mX;
+ private final float[] mY;
+
+ public PathInterpolatorBase(Path path) {
+ final PathMeasure pathMeasure = new PathMeasure(path, false /* forceClosed */);
+
+ final float pathLength = pathMeasure.getLength();
+ final int numPoints = (int) (pathLength / PRECISION) + 1;
+
+ mX = new float[numPoints];
+ mY = new float[numPoints];
+
+ final float[] position = new float[2];
+ for (int i = 0; i < numPoints; ++i) {
+ final float distance = (i * pathLength) / (numPoints - 1);
+ pathMeasure.getPosTan(distance, position, null /* tangent */);
+
+ mX[i] = position[0];
+ mY[i] = position[1];
+ }
+ }
+
+ public PathInterpolatorBase(float controlX, float controlY) {
+ this(createQuad(controlX, controlY));
+ }
+
+ public PathInterpolatorBase(float controlX1, float controlY1,
+ float controlX2, float controlY2) {
+ this(createCubic(controlX1, controlY1, controlX2, controlY2));
+ }
+
+ @Override
+ public float getInterpolation(float t) {
+ if (t <= 0.0f) {
+ return 0.0f;
+ } else if (t >= 1.0f) {
+ return 1.0f;
+ }
+
+ // Do a binary search for the correct x to interpolate between.
+ int startIndex = 0;
+ int endIndex = mX.length - 1;
+ while (endIndex - startIndex > 1) {
+ int midIndex = (startIndex + endIndex) / 2;
+ if (t < mX[midIndex]) {
+ endIndex = midIndex;
+ } else {
+ startIndex = midIndex;
+ }
+ }
+
+ final float xRange = mX[endIndex] - mX[startIndex];
+ if (xRange == 0) {
+ return mY[startIndex];
+ }
+
+ final float tInRange = t - mX[startIndex];
+ final float fraction = tInRange / xRange;
+
+ final float startY = mY[startIndex];
+ final float endY = mY[endIndex];
+
+ return startY + (fraction * (endY - startY));
+ }
+
+ private static Path createQuad(float controlX, float controlY) {
+ final Path path = new Path();
+ path.moveTo(0.0f, 0.0f);
+ path.quadTo(controlX, controlY, 1.0f, 1.0f);
+ return path;
+ }
+
+ private static Path createCubic(float controlX1, float controlY1,
+ float controlX2, float controlY2) {
+ final Path path = new Path();
+ path.moveTo(0.0f, 0.0f);
+ path.cubicTo(controlX1, controlY1, controlX2, controlY2, 1.0f, 1.0f);
+ return path;
+ }
+ }
+
+}
+