我使用毕加索图像下载我的应用程序。我在一个情况下，我需要先访问该位图前，它加载到ImageView的。在Downloader.Response类的presence似乎在暗示这是可能的，但我找不到任何用途的例子。我不想写一堆更code以异步方式处理这一特殊情况下，如果有可能做的毕加索。谁能告诉我该怎么办呢？

I'm using Picasso to download images for my app. I'm in a situation where I need to access the Bitmap first before it's loaded into the ImageView. The presence of the Downloader.Response class seems to suggest this is possible, but I can't find any use examples. I don't want to write a bunch more code to asynchronously handle this one particular case if it's possible to do with Picasso. Can anyone show me how to do it?

推荐答案

万一有人找到了答案，在github上很纳闷：

Found the answer on github in case anyone is wondering:

private Target target = new Target() {
      @Override
      public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {       
      }
      @Override
      public void onBitmapFailed() {
      }
}

private void someMethod() {
   Picasso.with(this).load("url").into(target);
}

@Override 
public void onDestroy() {  // could be in onPause or onStop
   Picasso.with(this).cancelRequest(target);
   super.onDestroy();
}

建议不要使用匿名回调，并用一个实例变量为目标，而不是一职。

The post recommends not using an anonymous callback, and instead using an instance variable for target.