RecyclerView 需要的动画资源

package it.gmariotti.recyclerview.itemanimator; /* * This code is cloned from DefaultItemAnimator provided by support library v7-recyclerView * * Copyright (C) 2014 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. */ import android.support.v4.view.ViewCompat; import android.support.v4.view.ViewPropertyAnimatorListener; import android.support.v7.widget.RecyclerView; import android.view.View; import java.util.ArrayList; /** * This implementation of {@link android.support.v7.widget.RecyclerView.ItemAnimator} provides basic * animations on remove, add, and move events that happen to the items in * a RecyclerView. * * @see android.support.v7.widget.RecyclerView#setItemAnimator(android.support.v7.widget.RecyclerView.ItemAnimator) */ public abstract class BaseItemAnimator extends RecyclerView.ItemAnimator { /** * RecyclerView */ protected RecyclerView mRecyclerView; public BaseItemAnimator(RecyclerView recyclerView){ mRecyclerView = recyclerView; } private ArrayList<RecyclerView.ViewHolder> mPendingRemovals = new ArrayList<RecyclerView.ViewHolder>(); private ArrayList<RecyclerView.ViewHolder> mPendingAdditions = new ArrayList<RecyclerView.ViewHolder>(); private ArrayList<MoveInfo> mPendingMoves = new ArrayList<MoveInfo>(); private ArrayList<RecyclerView.ViewHolder> mAdditions = new ArrayList<RecyclerView.ViewHolder>(); private ArrayList<MoveInfo> mMoves = new ArrayList<MoveInfo>(); protected ArrayList<RecyclerView.ViewHolder> mAddAnimations = new ArrayList<RecyclerView.ViewHolder>(); protected ArrayList<RecyclerView.ViewHolder> mMoveAnimations = new ArrayList<RecyclerView.ViewHolder>(); protected ArrayList<RecyclerView.ViewHolder> mRemoveAnimations = new ArrayList<RecyclerView.ViewHolder>(); private static class MoveInfo { public RecyclerView.ViewHolder holder; public int fromX, fromY, toX, toY; private MoveInfo(RecyclerView.ViewHolder holder, int fromX, int fromY, int toX, int toY) { this.holder = holder; this.fromX = fromX; this.fromY = fromY; this.toX = toX; this.toY = toY; } } @Override public void runPendingAnimations() { boolean removalsPending = !mPendingRemovals.isEmpty(); boolean movesPending = !mPendingMoves.isEmpty(); boolean additionsPending = !mPendingAdditions.isEmpty(); if (!removalsPending && !movesPending && !additionsPending) { // nothing to animate return; } // First, remove stuff for (RecyclerView.ViewHolder holder : mPendingRemovals) { animateRemoveImpl(holder); } mPendingRemovals.clear(); // Next, move stuff if (movesPending) { mMoves.addAll(mPendingMoves); mPendingMoves.clear(); Runnable mover = new Runnable() { @Override public void run() { for (MoveInfo moveInfo : mMoves) { animateMoveImpl(moveInfo.holder, moveInfo.fromX, moveInfo.fromY, moveInfo.toX, moveInfo.toY); } mMoves.clear(); } }; if (removalsPending) { View view = mMoves.get(0).holder.itemView; ViewCompat.postOnAnimationDelayed(view, mover, getRemoveDuration()); } else { mover.run(); } } // Next, add stuff if (additionsPending) { mAdditions.addAll(mPendingAdditions); mPendingAdditions.clear(); Runnable adder = new Runnable() { public void run() { for (RecyclerView.ViewHolder holder : mAdditions) { animateAddImpl(holder); } mAdditions.clear(); } }; if (removalsPending || movesPending) { View view = mAdditions.get(0).itemView; ViewCompat.postOnAnimationDelayed(view, adder, (removalsPending ? getRemoveDuration() : 0) + (movesPending ? getMoveDuration() : 0)); } else { adder.run(); } } } @Override public boolean animateAdd(final RecyclerView.ViewHolder holder) { prepareAnimateAdd(holder); mPendingAdditions.add(holder); return true; } protected abstract void prepareAnimateAdd(final RecyclerView.ViewHolder holder); protected abstract void animateAddImpl(final RecyclerView.ViewHolder holder); @Override public boolean animateRemove(final RecyclerView.ViewHolder holder) { mPendingRemovals.add(holder); return true; } protected abstract void animateRemoveImpl(final RecyclerView.ViewHolder holder); @Override public boolean animateMove(final RecyclerView.ViewHolder holder, int fromX, int fromY, int toX, int toY) { final View view = holder.itemView; int deltaX = toX - fromX; int deltaY = toY - fromY; if (deltaX == 0 && deltaY == 0) { dispatchMoveFinished(holder); return false; } if (deltaX != 0) { ViewCompat.setTranslationX(view, -deltaX); } if (deltaY != 0) { ViewCompat.setTranslationY(view, -deltaY); } mPendingMoves.add(new MoveInfo(holder, fromX, fromY, toX, toY)); return true; } protected void animateMoveImpl(final RecyclerView.ViewHolder holder, int fromX, int fromY, int toX, int toY) { final View view = holder.itemView; final int deltaX = toX - fromX; final int deltaY = toY - fromY; ViewCompat.animate(view).cancel(); if (deltaX != 0) { ViewCompat.animate(view).translationX(0); } if (deltaY != 0) { ViewCompat.animate(view).translationY(0); } // TODO: make EndActions end listeners instead, since end actions aren't called when // vpas are canceled (and can't end them. why?) // need listener functionality in VPACompat for this. Ick. ViewCompat.animate(view).setDuration(getMoveDuration()).setListener(new VpaListenerAdapter() { @Override public void onAnimationCancel(View view) { if (deltaX != 0) { ViewCompat.setTranslationX(view, 0); } if (deltaY != 0) { ViewCompat.setTranslationY(view, 0); } } @Override public void onAnimationEnd(View view) { dispatchMoveFinished(holder); mMoveAnimations.remove(holder); dispatchFinishedWhenDone(); } }).start(); mMoveAnimations.add(holder); } @Override public void endAnimation(RecyclerView.ViewHolder item) { final View view = item.itemView; ViewCompat.animate(view).cancel(); if (mPendingMoves.contains(item)) { ViewCompat.setTranslationY(view, 0); ViewCompat.setTranslationX(view, 0); dispatchMoveFinished(item); mPendingMoves.remove(item); } if (mPendingRemovals.contains(