ScaleInAnimationAdapter.java

/*
 * Copyright 2013 Niek Haarman
 *
 * 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 com.nhaarman.listviewanimations.swinginadapters.prepared;

import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;

import com.nhaarman.listviewanimations.swinginadapters.AnimationAdapter;
import com.nineoldandroids.animation.Animator;
import com.nineoldandroids.animation.ObjectAnimator;

public class ScaleInAnimationAdapter extends AnimationAdapter {

    private static final float DEFAULTSCALEFROM = 0.8f;
    private static final String SCALE_X = "scaleX";
    private static final String SCALE_Y = "scaleY";

    private final float mScaleFrom;
    private final long mAnimationDelayMillis;
    private final long mAnimationDurationMillis;

    public ScaleInAnimationAdapter(final BaseAdapter baseAdapter) {
        this(baseAdapter, DEFAULTSCALEFROM);
    }

    public ScaleInAnimationAdapter(final BaseAdapter baseAdapter, final float scaleFrom) {
        this(baseAdapter, scaleFrom, DEFAULTANIMATIONDELAYMILLIS, DEFAULTANIMATIONDURATIONMILLIS);
    }

    public ScaleInAnimationAdapter(final BaseAdapter baseAdapter, final float scaleFrom, final long animationDelayMillis, final long animationDurationMillis) {
        super(baseAdapter);
        mScaleFrom = scaleFrom;
        mAnimationDelayMillis = animationDelayMillis;
        mAnimationDurationMillis = animationDurationMillis;
    }

    @Override
    protected long getAnimationDelayMillis() {
        return mAnimationDelayMillis;
    }

    @Override
    protected long getAnimationDurationMillis() {
        return mAnimationDurationMillis;
    }

    @Override
    public Animator[] getAnimators(final ViewGroup parent, final View view) {
        ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, SCALE_X, mScaleFrom, 1f);
        ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, SCALE_Y, mScaleFrom, 1f);
        return new ObjectAnimator[]{scaleX, scaleY};
    }
}