显示一个＆QUOT;载入中...＆QUOT;图像，同时图像毕加索的后台加载 [英] Show an "Loading..." image while background loading of image with Picasso

问题描述

我使用的毕加索的图像后台加载（列表视图和ImagePager）。我可以设置加载图像和errorimage与毕加索，但我无法在后台加载，以显示加载中形象。

I am using Picasso for background loading of images (list view and ImagePager). I can set loading image and errorimage with Picasso, but I am unable to show a "loading in progress" Image during background loading.

有没有人一个想法如何完成这件事？在我PagerAdapter类，我有以下方法：

Has anybody an idea how to get this done? In my PagerAdapter Class I have the following method:

        @Override
public Object instantiateItem(ViewGroup container, int position) {
    ImageView imageView = new ImageView(context);
    int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_medium);
    imageView.setPadding(padding, padding, padding, padding);
    imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

    // Set default Image before loading real image
    imageView.setImageResource(R.drawable.img_def);

    imageView.setId(imgViewId);
    imageView.setClickable(true);
    imageView.setOnClickListener(this);
    ((ViewPager) container).addView(imageView, 0);

    // Set default Image before loading real image
    Picasso.with(context).load(R.drawable.img_def).into(imageView);

    // Load real image with Picasso and show error image if failed
    Picasso.with(context).load(GalImgUrls[position]).error(R.drawable.no_img).into(imageView);

    return imageView;
}

然而，它并没有显示正在加载...的形象。任何解决方案/想法？

However, it does not show the "loading..." image. Any solutions/ideas?

谢谢！

推荐答案

看起来像我找到了解决自己。使用占位符的形象：

Looks like I found a solution myself. Use "placeholder" image:

       Picasso.with(context).load(tnu).error(R.drawable.no_img).placeholder(R.drawable.img_def).into(holder.immoPic);

作品般的魅力......

Works like charm....

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