问viewpager + picasso + photoview问题

EN

public class ImageViewerPagerAdapter extends PagerAdapter implements PhotoViewAttacher.OnViewTapListener {


Context context;
private int count;
private ArrayList<String> images;
private PhotoViewAttacher mAttacher;
private boolean shouldFit = false;


public ImageViewerPagerAdapter(Context context, int count, ArrayList<String> images, boolean shouldFit) {
    this.context = context;
    this.count = count;
    this.images = new ArrayList<>(images);
    this.shouldFit = shouldFit;

}


@Override
public int getCount() {
    return count;
}

@Override
public boolean isViewFromObject(View view, Object object) {
    return view == object;
}


@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    container.removeView((FrameLayout) object);
}


@Override
public Object instantiateItem(ViewGroup container, int position) {

    String imageUrl = images.get(position);
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.activity_image_viewpager_layout, container, false);
    final PhotoView imageView = (PhotoView) view.findViewById(R.id.image);
    if (shouldFit) {
        Picasso.with(context).load(imageUrl).into(imageView, new Callback() {
            @Override
            public void onSuccess() {

                if (mAttacher != null) {
                    mAttacher.update();
                } else {
                    mAttacher = new PhotoViewAttacher(imageView);
                    mAttacher.setOnViewTapListener(ImageViewerPagerAdapter.this);
                }

            }

            @Override
            public void onError() {

            }
        });
    } else {
        Picasso.with(context).load(imageUrl).into(imageView, new Callback() {
            @Override
            public void onSuccess() {
                if (mAttacher != null) {
                    mAttacher.update();
                } else {
                    mAttacher = new PhotoViewAttacher(imageView);
                    mAttacher.setOnViewTapListener(ImageViewerPagerAdapter.this);
                }
            }

            @Override
            public void onError() {

            }
        });
    }

    container.addView(view);


    return view;
}


@Override
public void onViewTap(View view, float v, float v1) {
    Toaster.make(context,"hello");
    ((ImageViewPagerActivity) context).animateToolbar();
}


}