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

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Which provides simple Item animations to RecyclerView items

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package jp.wasabeef.recyclerview.animators.adapters;

import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
 * 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 class AlphaInAnimationAdapter extends AnimationAdapter {

    private static final float DEFAULT_ALPHA_FROM = 0f;
    private final float mFrom;

    public AlphaInAnimationAdapter(RecyclerView.Adapter adapter) {
        this(adapter, DEFAULT_ALPHA_FROM);
    }

    public AlphaInAnimationAdapter(RecyclerView.Adapter adapter, float from) {
        super(adapter);
        mFrom = from;
    }

    @Override
    protected Animator[] getAnimators(View view) {
        return new Animator[]{ObjectAnimator.ofFloat(view, "alpha", mFrom, 1f)};
    }
}