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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* 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.internal.transition;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.TimeInterpolator;
import android.animation.TypeEvaluator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.transition.TransitionValues;
import android.transition.Visibility;
import android.util.AttributeSet;
import android.util.Property;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import com.android.internal.R;
/**
* EpicenterTranslateClipReveal captures the clip bounds and translation values
* before and after the scene change and animates between those and the
* epicenter bounds during a visibility transition.
*/
public class EpicenterTranslateClipReveal extends Visibility {
private static final String PROPNAME_CLIP = "android:epicenterReveal:clip";
private static final String PROPNAME_BOUNDS = "android:epicenterReveal:bounds";
private static final String PROPNAME_TRANSLATE_X = "android:epicenterReveal:translateX";
private static final String PROPNAME_TRANSLATE_Y = "android:epicenterReveal:translateY";
private static final String PROPNAME_TRANSLATE_Z = "android:epicenterReveal:translateZ";
private static final String PROPNAME_Z = "android:epicenterReveal:z";
private final TimeInterpolator mInterpolatorX;
private final TimeInterpolator mInterpolatorY;
private final TimeInterpolator mInterpolatorZ;
public EpicenterTranslateClipReveal() {
mInterpolatorX = null;
mInterpolatorY = null;
mInterpolatorZ = null;
}
public EpicenterTranslateClipReveal(Context context, AttributeSet attrs) {
super(context, attrs);
final TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.EpicenterTranslateClipReveal, 0, 0);
final int interpolatorX = a.getResourceId(
R.styleable.EpicenterTranslateClipReveal_interpolatorX, 0);
if (interpolatorX != 0) {
mInterpolatorX = AnimationUtils.loadInterpolator(context, interpolatorX);
} else {
mInterpolatorX = TransitionConstants.LINEAR_OUT_SLOW_IN;
}
final int interpolatorY = a.getResourceId(
R.styleable.EpicenterTranslateClipReveal_interpolatorY, 0);
if (interpolatorY != 0) {
mInterpolatorY = AnimationUtils.loadInterpolator(context, interpolatorY);
} else {
mInterpolatorY = TransitionConstants.FAST_OUT_SLOW_IN;
}
final int interpolatorZ = a.getResourceId(
R.styleable.EpicenterTranslateClipReveal_interpolatorZ, 0);
if (interpolatorZ != 0) {
mInterpolatorZ = AnimationUtils.loadInterpolator(context, interpolatorZ);
} else {
mInterpolatorZ = TransitionConstants.FAST_OUT_SLOW_IN;
}
a.recycle();
}
@Override
public void captureStartValues(TransitionValues transitionValues) {
super.captureStartValues(transitionValues);
captureValues(transitionValues);
}
@Override
public void captureEndValues(TransitionValues transitionValues) {
super.captureEndValues(transitionValues);
captureValues(transitionValues);
}
private void captureValues(TransitionValues values) {
final View view = values.view;
if (view.getVisibility() == View.GONE) {
return;
}
final Rect bounds = new Rect(0, 0, view.getWidth(), view.getHeight());
values.values.put(PROPNAME_BOUNDS, bounds);
values.values.put(PROPNAME_TRANSLATE_X, view.getTranslationX());
values.values.put(PROPNAME_TRANSLATE_Y, view.getTranslationY());
values.values.put(PROPNAME_TRANSLATE_Z, view.getTranslationZ());
values.values.put(PROPNAME_Z, view.getZ());
final Rect clip = view.getClipBounds();
values.values.put(PROPNAME_CLIP, clip);
}
@Override
public Animator onAppear(ViewGroup sceneRoot, View view,
TransitionValues startValues, TransitionValues endValues) {
if (endValues == null) {
return null;
}
final Rect endBounds = (Rect) endValues.values.get(PROPNAME_BOUNDS);
final Rect startBounds = getEpicenterOrCenter(endBounds);
final float startX = startBounds.centerX() - endBounds.centerX();
final float startY = startBounds.centerY() - endBounds.centerY();
final float startZ = 0 - (float) endValues.values.get(PROPNAME_Z);
// Translate the view to be centered on the epicenter.
view.setTranslationX(startX);
view.setTranslationY(startY);
view.setTranslationZ(startZ);
final float endX = (float) endValues.values.get(PROPNAME_TRANSLATE_X);
final float endY = (float) endValues.values.get(PROPNAME_TRANSLATE_Y);
final float endZ = (float) endValues.values.get(PROPNAME_TRANSLATE_Z);
final Rect endClip = getBestRect(endValues);
final Rect startClip = getEpicenterOrCenter(endClip);
// Prepare the view.
view.setClipBounds(startClip);
final State startStateX = new State(startClip.left, startClip.right, startX);
final State endStateX = new State(endClip.left, endClip.right, endX);
final State startStateY = new State(startClip.top, startClip.bottom, startY);
final State endStateY = new State(endClip.top, endClip.bottom, endY);
return createRectAnimator(view, startStateX, startStateY, startZ, endStateX, endStateY,
endZ, endValues, mInterpolatorX, mInterpolatorY, mInterpolatorZ);
}
@Override
public Animator onDisappear(ViewGroup sceneRoot, View view,
TransitionValues startValues, TransitionValues endValues) {
if (startValues == null) {
return null;
}
final Rect startBounds = (Rect) endValues.values.get(PROPNAME_BOUNDS);
final Rect endBounds = getEpicenterOrCenter(startBounds);
final float endX = endBounds.centerX() - startBounds.centerX();
final float endY = endBounds.centerY() - startBounds.centerY();
final float endZ = 0 - (float) startValues.values.get(PROPNAME_Z);
final float startX = (float) endValues.values.get(PROPNAME_TRANSLATE_X);
final float startY = (float) endValues.values.get(PROPNAME_TRANSLATE_Y);
final float startZ = (float) endValues.values.get(PROPNAME_TRANSLATE_Z);
final Rect startClip = getBestRect(startValues);
final Rect endClip = getEpicenterOrCenter(startClip);
// Prepare the view.
view.setClipBounds(startClip);
final State startStateX = new State(startClip.left, startClip.right, startX);
final State endStateX = new State(endClip.left, endClip.right, endX);
final State startStateY = new State(startClip.top, startClip.bottom, startY);
final State endStateY = new State(endClip.top, endClip.bottom, endY);
return createRectAnimator(view, startStateX, startStateY, startZ, endStateX, endStateY,
endZ, endValues, mInterpolatorX, mInterpolatorY, mInterpolatorZ);
}
private Rect getEpicenterOrCenter(Rect bestRect) {
final Rect epicenter = getEpicenter();
if (epicenter != null) {
return epicenter;
}
final int centerX = bestRect.centerX();
final int centerY = bestRect.centerY();
return new Rect(centerX, centerY, centerX, centerY);
}
private Rect getBestRect(TransitionValues values) {
final Rect clipRect = (Rect) values.values.get(PROPNAME_CLIP);
if (clipRect == null) {
return (Rect) values.values.get(PROPNAME_BOUNDS);
}
return clipRect;
}
private static Animator createRectAnimator(final View view, State startX, State startY,
float startZ, State endX, State endY, float endZ, TransitionValues endValues,
TimeInterpolator interpolatorX, TimeInterpolator interpolatorY,
TimeInterpolator interpolatorZ) {
final StateEvaluator evaluator = new StateEvaluator();
final ObjectAnimator animZ = ObjectAnimator.ofFloat(view, View.TRANSLATION_Z, startZ, endZ);
if (interpolatorZ != null) {
animZ.setInterpolator(interpolatorZ);
}
final StateProperty propX = new StateProperty(StateProperty.TARGET_X);
final ObjectAnimator animX = ObjectAnimator.ofObject(view, propX, evaluator, startX, endX);
if (interpolatorX != null) {
animX.setInterpolator(interpolatorX);
}
final StateProperty propY = new StateProperty(StateProperty.TARGET_Y);
final ObjectAnimator animY = ObjectAnimator.ofObject(view, propY, evaluator, startY, endY);
if (interpolatorY != null) {
animY.setInterpolator(interpolatorY);
}
final Rect terminalClip = (Rect) endValues.values.get(PROPNAME_CLIP);
final AnimatorListenerAdapter animatorListener = new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
view.setClipBounds(terminalClip);
}
};
final AnimatorSet animSet = new AnimatorSet();
animSet.playTogether(animX, animY, animZ);
animSet.addListener(animatorListener);
return animSet;
}
private static class State {
int lower;
int upper;
float trans;
public State() {}
public State(int lower, int upper, float trans) {
this.lower = lower;
this.upper = upper;
this.trans = trans;
}
}
private static class StateEvaluator implements TypeEvaluator {
private final State mTemp = new State();
@Override
public State evaluate(float fraction, State startValue, State endValue) {
mTemp.upper = startValue.upper + (int) ((endValue.upper - startValue.upper) * fraction);
mTemp.lower = startValue.lower + (int) ((endValue.lower - startValue.lower) * fraction);
mTemp.trans = startValue.trans + (int) ((endValue.trans - startValue.trans) * fraction);
return mTemp;
}
}
private static class StateProperty extends Property {
public static final char TARGET_X = 'x';
public static final char TARGET_Y = 'y';
private final Rect mTempRect = new Rect();
private final State mTempState = new State();
private final int mTargetDimension;
public StateProperty(char targetDimension) {
super(State.class, "state_" + targetDimension);
mTargetDimension = targetDimension;
}
@Override
public State get(View object) {
final Rect tempRect = mTempRect;
if (!object.getClipBounds(tempRect)) {
tempRect.setEmpty();
}
final State tempState = mTempState;
if (mTargetDimension == TARGET_X) {
tempState.trans = object.getTranslationX();
tempState.lower = tempRect.left + (int) tempState.trans;
tempState.upper = tempRect.right + (int) tempState.trans;
} else {
tempState.trans = object.getTranslationY();
tempState.lower = tempRect.top + (int) tempState.trans;
tempState.upper = tempRect.bottom + (int) tempState.trans;
}
return tempState;
}
@Override
public void set(View object, State value) {
final Rect tempRect = mTempRect;
if (object.getClipBounds(tempRect)) {
if (mTargetDimension == TARGET_X) {
tempRect.left = value.lower - (int) value.trans;
tempRect.right = value.upper - (int) value.trans;
} else {
tempRect.top = value.lower - (int) value.trans;
tempRect.bottom = value.upper - (int) value.trans;
}
object.setClipBounds(tempRect);
}
if (mTargetDimension == TARGET_X) {
object.setTranslationX(value.trans);
} else {
object.setTranslationY(value.trans);
}
}
}
}
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