| /* |
| * Copyright (C) 2010 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.animation; |
| |
| import android.content.Context; |
| import android.content.res.Resources; |
| import android.content.res.TypedArray; |
| import android.content.res.XmlResourceParser; |
| import android.content.res.Resources.NotFoundException; |
| import android.util.AttributeSet; |
| import android.util.TypedValue; |
| import android.util.Xml; |
| import android.view.animation.AnimationUtils; |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| |
| /** |
| * This class is used to instantiate animator XML files into Animator objects. |
| * <p> |
| * For performance reasons, inflation relies heavily on pre-processing of |
| * XML files that is done at build time. Therefore, it is not currently possible |
| * to use this inflater with an XmlPullParser over a plain XML file at runtime; |
| * it only works with an XmlPullParser returned from a compiled resource (R. |
| * <em>something</em> file.) |
| */ |
| public class AnimatorInflater { |
| |
| /** |
| * These flags are used when parsing AnimatorSet objects |
| */ |
| private static final int TOGETHER = 0; |
| private static final int SEQUENTIALLY = 1; |
| |
| /** |
| * Enum values used in XML attributes to indicate the value for mValueType |
| */ |
| private static final int VALUE_TYPE_FLOAT = 0; |
| private static final int VALUE_TYPE_INT = 1; |
| private static final int VALUE_TYPE_COLOR = 4; |
| private static final int VALUE_TYPE_CUSTOM = 5; |
| |
| /** |
| * Loads an {@link Animator} object from a resource |
| * |
| * @param context Application context used to access resources |
| * @param id The resource id of the animation to load |
| * @return The animator object reference by the specified id |
| * @throws android.content.res.Resources.NotFoundException when the animation cannot be loaded |
| */ |
| public static Animator loadAnimator(Context context, int id) |
| throws NotFoundException { |
| |
| XmlResourceParser parser = null; |
| try { |
| parser = context.getResources().getAnimation(id); |
| return createAnimatorFromXml(context, parser); |
| } catch (XmlPullParserException ex) { |
| Resources.NotFoundException rnf = |
| new Resources.NotFoundException("Can't load animation resource ID #0x" + |
| Integer.toHexString(id)); |
| rnf.initCause(ex); |
| throw rnf; |
| } catch (IOException ex) { |
| Resources.NotFoundException rnf = |
| new Resources.NotFoundException("Can't load animation resource ID #0x" + |
| Integer.toHexString(id)); |
| rnf.initCause(ex); |
| throw rnf; |
| } finally { |
| if (parser != null) parser.close(); |
| } |
| } |
| |
| private static Animator createAnimatorFromXml(Context c, XmlPullParser parser) |
| throws XmlPullParserException, IOException { |
| |
| return createAnimatorFromXml(c, parser, Xml.asAttributeSet(parser), null, 0); |
| } |
| |
| private static Animator createAnimatorFromXml(Context c, XmlPullParser parser, |
| AttributeSet attrs, AnimatorSet parent, int sequenceOrdering) |
| throws XmlPullParserException, IOException { |
| |
| Animator anim = null; |
| ArrayList<Animator> childAnims = null; |
| |
| // Make sure we are on a start tag. |
| int type; |
| int depth = parser.getDepth(); |
| |
| while (((type=parser.next()) != XmlPullParser.END_TAG || parser.getDepth() > depth) |
| && type != XmlPullParser.END_DOCUMENT) { |
| |
| if (type != XmlPullParser.START_TAG) { |
| continue; |
| } |
| |
| String name = parser.getName(); |
| |
| if (name.equals("objectAnimator")) { |
| anim = loadObjectAnimator(c, attrs); |
| } else if (name.equals("animator")) { |
| anim = loadAnimator(c, attrs, null); |
| } else if (name.equals("set")) { |
| anim = new AnimatorSet(); |
| TypedArray a = c.obtainStyledAttributes(attrs, |
| com.android.internal.R.styleable.AnimatorSet); |
| int ordering = a.getInt(com.android.internal.R.styleable.AnimatorSet_ordering, |
| TOGETHER); |
| createAnimatorFromXml(c, parser, attrs, (AnimatorSet) anim, ordering); |
| a.recycle(); |
| } else { |
| throw new RuntimeException("Unknown animator name: " + parser.getName()); |
| } |
| |
| if (parent != null) { |
| if (childAnims == null) { |
| childAnims = new ArrayList<Animator>(); |
| } |
| childAnims.add(anim); |
| } |
| } |
| if (parent != null && childAnims != null) { |
| Animator[] animsArray = new Animator[childAnims.size()]; |
| int index = 0; |
| for (Animator a : childAnims) { |
| animsArray[index++] = a; |
| } |
| if (sequenceOrdering == TOGETHER) { |
| parent.playTogether(animsArray); |
| } else { |
| parent.playSequentially(animsArray); |
| } |
| } |
| |
| return anim; |
| |
| } |
| |
| private static ObjectAnimator loadObjectAnimator(Context context, AttributeSet attrs) |
| throws NotFoundException { |
| |
| ObjectAnimator anim = new ObjectAnimator(); |
| |
| loadAnimator(context, attrs, anim); |
| |
| TypedArray a = |
| context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.PropertyAnimator); |
| |
| String propertyName = a.getString(com.android.internal.R.styleable.PropertyAnimator_propertyName); |
| |
| anim.setPropertyName(propertyName); |
| |
| a.recycle(); |
| |
| return anim; |
| } |
| |
| /** |
| * Creates a new animation whose parameters come from the specified context and |
| * attributes set. |
| * |
| * @param context the application environment |
| * @param attrs the set of attributes holding the animation parameters |
| */ |
| private static ValueAnimator loadAnimator(Context context, AttributeSet attrs, ValueAnimator anim) |
| throws NotFoundException { |
| |
| TypedArray a = |
| context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Animator); |
| |
| long duration = a.getInt(com.android.internal.R.styleable.Animator_duration, 0); |
| |
| long startDelay = a.getInt(com.android.internal.R.styleable.Animator_startOffset, 0); |
| |
| int valueType = a.getInt(com.android.internal.R.styleable.Animator_valueType, |
| VALUE_TYPE_FLOAT); |
| |
| if (anim == null) { |
| anim = new ValueAnimator(); |
| } |
| TypeEvaluator evaluator = null; |
| |
| int valueFromIndex = com.android.internal.R.styleable.Animator_valueFrom; |
| int valueToIndex = com.android.internal.R.styleable.Animator_valueTo; |
| |
| boolean getFloats = (valueType == VALUE_TYPE_FLOAT); |
| |
| TypedValue tvFrom = a.peekValue(valueFromIndex); |
| boolean hasFrom = (tvFrom != null); |
| int fromType = hasFrom ? tvFrom.type : 0; |
| TypedValue tvTo = a.peekValue(valueToIndex); |
| boolean hasTo = (tvTo != null); |
| int toType = hasTo ? tvTo.type : 0; |
| |
| if ((hasFrom && (fromType >= TypedValue.TYPE_FIRST_COLOR_INT) && |
| (fromType <= TypedValue.TYPE_LAST_COLOR_INT)) || |
| (hasTo && (toType >= TypedValue.TYPE_FIRST_COLOR_INT) && |
| (toType <= TypedValue.TYPE_LAST_COLOR_INT))) { |
| // special case for colors: ignore valueType and get ints |
| getFloats = false; |
| anim.setEvaluator(new ArgbEvaluator()); |
| } |
| |
| if (getFloats) { |
| float valueFrom; |
| float valueTo; |
| if (hasFrom) { |
| if (fromType == TypedValue.TYPE_DIMENSION) { |
| valueFrom = a.getDimension(valueFromIndex, 0f); |
| } else { |
| valueFrom = a.getFloat(valueFromIndex, 0f); |
| } |
| if (hasTo) { |
| if (toType == TypedValue.TYPE_DIMENSION) { |
| valueTo = a.getDimension(valueToIndex, 0f); |
| } else { |
| valueTo = a.getFloat(valueToIndex, 0f); |
| } |
| anim.setFloatValues(valueFrom, valueTo); |
| } else { |
| anim.setFloatValues(valueFrom); |
| } |
| } else { |
| if (toType == TypedValue.TYPE_DIMENSION) { |
| valueTo = a.getDimension(valueToIndex, 0f); |
| } else { |
| valueTo = a.getFloat(valueToIndex, 0f); |
| } |
| anim.setFloatValues(valueTo); |
| } |
| } else { |
| int valueFrom; |
| int valueTo; |
| if (hasFrom) { |
| if (fromType == TypedValue.TYPE_DIMENSION) { |
| valueFrom = (int) a.getDimension(valueFromIndex, 0f); |
| } else if ((fromType >= TypedValue.TYPE_FIRST_COLOR_INT) && |
| (fromType <= TypedValue.TYPE_LAST_COLOR_INT)) { |
| valueFrom = a.getColor(valueFromIndex, 0); |
| } else { |
| valueFrom = a.getInt(valueFromIndex, 0); |
| } |
| if (hasTo) { |
| if (toType == TypedValue.TYPE_DIMENSION) { |
| valueTo = (int) a.getDimension(valueToIndex, 0f); |
| } else if ((toType >= TypedValue.TYPE_FIRST_COLOR_INT) && |
| (toType <= TypedValue.TYPE_LAST_COLOR_INT)) { |
| valueTo = a.getColor(valueToIndex, 0); |
| } else { |
| valueTo = a.getInt(valueToIndex, 0); |
| } |
| anim.setIntValues(valueFrom, valueTo); |
| } else { |
| anim.setIntValues(valueFrom); |
| } |
| } else { |
| if (hasTo) { |
| if (toType == TypedValue.TYPE_DIMENSION) { |
| valueTo = (int) a.getDimension(valueToIndex, 0f); |
| } else if ((toType >= TypedValue.TYPE_FIRST_COLOR_INT) && |
| (toType <= TypedValue.TYPE_LAST_COLOR_INT)) { |
| valueTo = a.getColor(valueToIndex, 0); |
| } else { |
| valueTo = a.getInt(valueToIndex, 0); |
| } |
| anim.setIntValues(valueTo); |
| } |
| } |
| } |
| |
| anim.setDuration(duration); |
| anim.setStartDelay(startDelay); |
| |
| if (a.hasValue(com.android.internal.R.styleable.Animator_repeatCount)) { |
| anim.setRepeatCount( |
| a.getInt(com.android.internal.R.styleable.Animator_repeatCount, 0)); |
| } |
| if (a.hasValue(com.android.internal.R.styleable.Animator_repeatMode)) { |
| anim.setRepeatMode( |
| a.getInt(com.android.internal.R.styleable.Animator_repeatMode, |
| ValueAnimator.RESTART)); |
| } |
| if (evaluator != null) { |
| anim.setEvaluator(evaluator); |
| } |
| |
| final int resID = |
| a.getResourceId(com.android.internal.R.styleable.Animator_interpolator, 0); |
| if (resID > 0) { |
| anim.setInterpolator(AnimationUtils.loadInterpolator(context, resID)); |
| } |
| a.recycle(); |
| |
| return anim; |
| } |
| } |
