使用Picasso加载多个图像-Android

user3421416 发表于 Dev

用户名

我正在尝试使用Picasso库从某些URL加载多个图像。

到目前为止，我已经尝试了以下代码：

 for(int i = 0; i < friends.size(); i++)
   {
       final Profile profile = friends.get(i);
       String url = profile.getUserImageUrl();


       Picasso.with(getContext()).load(url).into(new Target() {
           // It doesn't reach any of the code below ....!! 

           @Override
           public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from)    {
               profile.setUserImage(bitmap);
               counter++;

               if(counter >= friends.size() - 1)
                   cards();
           }

           @Override
           public void onBitmapFailed(Drawable drawable) {
               Log.e("App", "Failed to load company logo in onBitmapFailed method");
           }

           @Override
           public void onPrepareLoad(Drawable drawable) {
               Log.e("App","Failed to load company logo in onBitmapFailed method");
           }

       });
   }

此代码无效。当我运行此代码时，它不会到达Target界面内的任何行。有人对为什么有任何想法？

迈克尔·德索托

也许我在这里错过了一些东西，但我认为into()只接受ImageView和可选Callback。你能做这样的事情：

Picasso
    .with(getContext())
    .load(profile.getUserImageUrl())
    .into(imageView, new Callback()
    {
        @Override
        public void onSuccess()
        {
            // Update card
        }

        @Override
        public void onError()
        {
            Log.e("App","Failed to load company logo");
        }
    });

但是，让我们尝试一下：我猜您正在尝试将配置文件图像添加到一堆现有视图中，或者在遍历所有配置文件时动态地尝试创建这些视图。这是两种情况的解决方案：

for (int i = 0; i < friends.size(); i++)
{
    Profile profile = friends.get(i);
    if (profile != null)
    {
        /** Either find an existing view like this: **/

        // You're assembling a resource ID here.
        String resourceName = "profile_" + profile.getId(); // Assuming you have an ID.
        int resourceId = getResources().getIdentifier(resourceName, "id", getActivity().getPackageName());

        // Use it to get the image view in your activity's layout.
        ImageView imageView = (ImageView) findViewById(resourceId);
        if (imageView != null)
        {
            Picasso
                    .with(this)
                    .load(profile.getUserImageUrl())
                    .into(imageView);
        }

        /** Or inflate a View like this: **/

        // Get a containing view. You should move this above your
        // loop--it's here so I can keep these blocks together.
        FrameLayout frameLayout = (FrameLayout) findViewById(R.layout.frame_layout);

        // This is a layout that contains your image view and
        // any other views you want associated with a profile.
        View view = LayoutInflater.from(this).inflate(R.layout.profile_layout, null, false);

        // You're finding the view based from the inflated layout, not the activity layout
        ImageView imageView = (ImageView) view.findViewById(R.id.image_view);
        if (imageView != null)
        {
            Picasso
                    .with(this)
                    .load(profile.getUserImageUrl())
                    .into(imageView);
        }

        frameLayout.addView(view);
    }
}