jp.wasabeef.recyclerview.animators.adapters.AnimationAdapter Maven / Gradle / Ivy

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package jp.wasabeef.recyclerview.animators.adapters;

import android.animation.Animator;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;

import jp.wasabeef.recyclerview.animators.internal.ViewHelper;

/**
 * Copyright (C) 2015 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 {

    private RecyclerView.Adapter mAdapter;
    private int mDuration = 300;
    private Interpolator mInterpolator = new LinearInterpolator();
    private int mLastPosition = -1;

    private boolean isFirstOnly = true;

    public AnimationAdapter(RecyclerView.Adapter adapter) {
        mAdapter = adapter;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return mAdapter.onCreateViewHolder(parent, viewType);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        mAdapter.onBindViewHolder(holder, position);

        if (!isFirstOnly || position > mLastPosition) {
            for (Animator anim : getAnimators(holder.itemView)) {
                anim.setDuration(mDuration).start();
                anim.setInterpolator(mInterpolator);
            }
            mLastPosition = position;
        } else {
            ViewHelper.clear(holder.itemView);
        }
    }

    @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);
    }
}