| /* |
| * Copyright (C) 2008 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 android.view.animation.cts; |
| |
| import com.android.cts.view.R; |
| |
| |
| import android.app.Activity; |
| import android.content.res.XmlResourceParser; |
| import android.test.ActivityInstrumentationTestCase2; |
| import android.util.AttributeSet; |
| import android.util.Xml; |
| import android.view.View; |
| import android.view.animation.AccelerateInterpolator; |
| import android.view.animation.AlphaAnimation; |
| import android.view.animation.Animation; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.Interpolator; |
| import android.view.animation.Transformation; |
| |
| public class AccelerateInterpolatorTest |
| extends ActivityInstrumentationTestCase2<AnimationTestCtsActivity> { |
| |
| public AccelerateInterpolatorTest() { |
| super("com.android.cts.view", AnimationTestCtsActivity.class); |
| } |
| |
| private Activity mActivity; |
| private static final float ALPHA_DELTA = 0.001f; |
| |
| /** It is defined in R.anim.accelerate_alpha */ |
| private static final long ACCELERATE_ALPHA_DURATION = 1000; |
| |
| @Override |
| protected void setUp() throws Exception { |
| super.setUp(); |
| mActivity = getActivity(); |
| } |
| |
| public void testConstructor() { |
| new AccelerateInterpolator(); |
| |
| new AccelerateInterpolator(1.0f); |
| |
| XmlResourceParser parser = mActivity.getResources().getAnimation(R.anim.accelerate_alpha); |
| AttributeSet attrs = Xml.asAttributeSet(parser); |
| new AccelerateInterpolator(mActivity, attrs); |
| } |
| |
| public void testAccelerateInterpolator() { |
| final View animWindow = mActivity.findViewById(R.id.anim_window); |
| |
| // XML file of R.anim.accelerate_alpha |
| // <alpha xmlns:android="http://schemas.android.com/apk/res/android" |
| // android:interpolator="@android:anim/accelerate_interpolator" |
| // android:fromAlpha="0.1" |
| // android:toAlpha="0.9" |
| // android:duration="1000" /> |
| final Animation anim = AnimationUtils.loadAnimation(mActivity, R.anim.accelerate_alpha); |
| |
| assertEquals(ACCELERATE_ALPHA_DURATION, anim.getDuration()); |
| assertTrue(anim instanceof AlphaAnimation); |
| |
| // factor is 1.0f |
| Interpolator interpolator = new AccelerateInterpolator(1.0f); |
| anim.setInterpolator(interpolator); |
| assertFalse(anim.hasStarted()); |
| |
| AnimationTestUtils.assertRunAnimation(getInstrumentation(), animWindow, anim); |
| |
| Transformation transformation = new Transformation(); |
| long startTime = anim.getStartTime(); |
| anim.getTransformation(startTime, transformation); |
| float alpha1 = transformation.getAlpha(); |
| assertEquals(0.1f, alpha1, ALPHA_DELTA); |
| |
| anim.getTransformation(startTime + 250, transformation); |
| float alpha2 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + 500, transformation); |
| float alpha3 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + 750, transformation); |
| float alpha4 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + ACCELERATE_ALPHA_DURATION, transformation); |
| float alpha5 = transformation.getAlpha(); |
| assertEquals(0.9f, alpha5, ALPHA_DELTA); |
| |
| // check accelerating delta alpha |
| float delta1 = alpha2 - alpha1; |
| float delta2 = alpha3 - alpha2; |
| float delta3 = alpha4 - alpha3; |
| float delta4 = alpha5 - alpha4; |
| assertTrue(delta1 < delta2); |
| assertTrue(delta2 < delta3); |
| assertTrue(delta3 < delta4); |
| |
| // factor is 1.5f, it starts even slower and ends even faster than 1.0f |
| interpolator = new AccelerateInterpolator(1.5f); |
| anim.setInterpolator(interpolator); |
| |
| AnimationTestUtils.assertRunAnimation(getInstrumentation(), animWindow, anim); |
| |
| transformation = new Transformation(); |
| startTime = anim.getStartTime(); |
| anim.getTransformation(startTime, transformation); |
| float alpha6 = transformation.getAlpha(); |
| assertEquals(0.1f, alpha1, ALPHA_DELTA); |
| |
| anim.getTransformation(startTime + 250, transformation); |
| float alpha7 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + 500, transformation); |
| float alpha8 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + 750, transformation); |
| float alpha9 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + ACCELERATE_ALPHA_DURATION, transformation); |
| float alpha10 = transformation.getAlpha(); |
| assertEquals(0.9f, alpha5, ALPHA_DELTA); |
| |
| // check accelerating delta alpha |
| float delta5 = alpha7 - alpha6; |
| float delta6 = alpha8 - alpha7; |
| float delta7 = alpha9 - alpha8; |
| float delta8 = alpha10 - alpha9; |
| assertTrue(delta5 < delta6); |
| assertTrue(delta6 < delta7); |
| assertTrue(delta7 < delta8); |
| |
| // check whether it starts even slower |
| assertTrue(delta5 < delta1); |
| } |
| |
| public void testGetInterpolation() { |
| final float input = 0.25f; |
| Interpolator interpolator1 = new AccelerateInterpolator(1.0f); |
| // factor is 2.0f, it starts even slower and ends even faster than 1.0f |
| Interpolator interpolator2 = new AccelerateInterpolator(2.0f); |
| |
| float delta1 = interpolator1.getInterpolation(input); |
| float delta2 = interpolator2.getInterpolation(input); |
| |
| // check whether it starts even slower |
| assertTrue(delta2 < delta1); |
| |
| // call directly |
| Interpolator interpolator = new AccelerateInterpolator(); |
| |
| float alpha1 = interpolator.getInterpolation(0f); |
| float alpha2 = interpolator.getInterpolation(0.25f); |
| float alpha3 = interpolator.getInterpolation(0.5f); |
| float alpha4 = interpolator.getInterpolation(0.75f); |
| float alpha5 = interpolator.getInterpolation(1f); |
| // check accelerating and decelerating delta alpha |
| // starts and ends slowly, accelerates through middle |
| float delta3 = alpha2 - alpha1; |
| float delta4 = alpha3 - alpha2; |
| float delta5 = alpha4 - alpha3; |
| float delta6 = alpha5 - alpha4; |
| assertTrue(delta3 < delta4); |
| assertTrue(delta4 < delta5); |
| assertTrue(delta5 < delta6); |
| } |
| } |