A simple ImageView that fades in/out when the image is changed, image loading powered by picasso

ListImageView.java

package com.triveous.recorder.ui.widget;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
import com.squareup.picasso.Picasso;
import com.squareup.picasso.Target;
// optional log to benchmark load times
import hugo.weaving.DebugLog;

/**
 * A simple ImageView that fades in and out when the enclosed image is changed
 * How much of the old imagei shown before the new one is shown can be controlled by changing the FADEIN/OUT constants
 * Sample invocation: 
 * Picasso.with(context).load(new File(filename)).resize(imageWidth, imageWidth).centerCrop().error(R.drawable.error).noFade().into((Target)listImageView);
 */
public class ListImageView extends ImageView implements Target {
    private static final int TIME_FADE_IN = 180;
    private static final int TIME_FADE_OUT = 180;

    public ListImageView(Context context) {
        super(context);
    }

    public ListImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ListImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onBitmapLoaded(final Bitmap bitmap, Picasso.LoadedFrom from) {
        animate().alpha(0.0f).setDuration(TIME_FADE_OUT).setListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animation) {

            }

            @Override
            public void onAnimationEnd(Animator animation) {
                setImageBitmap(bitmap);
                animate().alpha(1f).setDuration(TIME_FADE_IN);
            }

            @Override
            public void onAnimationCancel(Animator animation) {

            }

            @Override
            public void onAnimationRepeat(Animator animation) {

            }
        });
    }

    @Override
    public void onBitmapFailed(Drawable errorDrawable) {

    }

    @Override
    public void onPrepareLoad(Drawable placeHolderDrawable) {

    }
}