package jp.wasabeef.recyclerview.adapters; import android.animation.Animator; import androidx.recyclerview.widget.RecyclerView; import android.view.View; import android.view.ViewGroup; import android.view.animation.Interpolator; import android.view.animation.LinearInterpolator; import jp.wasabeef.recyclerview.internal.ViewHelper; /** * Copyright (C) 2018 Wasabeef * * 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. */ public abstract class AnimationAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private RecyclerView.Adapter<RecyclerView.ViewHolder> mAdapter; private int mDuration = 300; private Interpolator mInterpolator = new LinearInterpolator(); private int mLastPosition = -1; private boolean isFirstOnly = true; public AnimationAdapter(RecyclerView.Adapter<RecyclerView.ViewHolder> adapter) { mAdapter = adapter; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { return mAdapter.onCreateViewHolder(parent, viewType); } @Override public void registerAdapterDataObserver(RecyclerView.AdapterDataObserver observer) { super.registerAdapterDataObserver(observer); mAdapter.registerAdapterDataObserver(observer); } @Override public void unregisterAdapterDataObserver(RecyclerView.AdapterDataObserver observer) { super.unregisterAdapterDataObserver(observer); mAdapter.unregisterAdapterDataObserver(observer); } @Override public void onAttachedToRecyclerView(RecyclerView recyclerView) { super.onAttachedToRecyclerView(recyclerView); mAdapter.onAttachedToRecyclerView(recyclerView); } @Override public void onDetachedFromRecyclerView(RecyclerView recyclerView) { super.onDetachedFromRecyclerView(recyclerView); mAdapter.onDetachedFromRecyclerView(recyclerView); } @Override public void onViewAttachedToWindow(RecyclerView.ViewHolder holder) { super.onViewAttachedToWindow(holder); mAdapter.onViewAttachedToWindow(holder); } @Override public void onViewDetachedFromWindow(RecyclerView.ViewHolder holder) { super.onViewDetachedFromWindow(holder); mAdapter.onViewDetachedFromWindow(holder); } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { mAdapter.onBindViewHolder(holder, position); int adapterPosition = holder.getAdapterPosition(); if (!isFirstOnly || adapterPosition > mLastPosition) { for (Animator anim : getAnimators(holder.itemView)) { anim.setDuration(mDuration).start(); anim.setInterpolator(mInterpolator); } mLastPosition = adapterPosition; } else { ViewHelper.clear(holder.itemView); } } @Override public void onViewRecycled(RecyclerView.ViewHolder holder) { mAdapter.onViewRecycled(holder); super.onViewRecycled(holder); } @Override public int getItemCount() { return mAdapter.getItemCount(); } public void setDuration(int duration) { mDuration = duration; } public void setInterpolator(Interpolator interpolator) { mInterpolator = interpolator; } public void setStartPosition(int start) { mLastPosition = start; } protected abstract Animator[] getAnimators(View view); public void setFirstOnly(boolean firstOnly) { isFirstOnly = firstOnly; } @Override public int getItemViewType(int position) { return mAdapter.getItemViewType(position); } public RecyclerView.Adapter<RecyclerView.ViewHolder> getWrappedAdapter() { return mAdapter; } @Override public long getItemId(int position) { return mAdapter.getItemId(position); } }