Android - 使用picasso加载图像而不将其存储在缓存中

I want to use picasso to load an image from a url into a placeholder, but not store that image in cache - in other words, I want the image to be downloaded from the net directly to disk and then loaded from disk when needed. I understand there's a class called RequestCreator where you can specify memory policy - does anyone have an example of using picasso/requestcreator to do something like this?

我想使用picasso将图像从url加载到占位符中,但不将该图像存储在缓存中 - 换句话说,我希望将图像从网络直接下载到磁盘,然后在需要时从磁盘加载。我知道有一个名为RequestCreator的类,你可以在其中指定内存策略 - 有没有人有一个使用picasso / requestcreator做这样的事情的例子?

So.. something like:

所以...类似于:

RequestCreator requestCreator = new RequestCreator();
requestCreator.memoryPolicy(MemoryPolicy.NO_CACHE);
....

merged with:

Picasso.with(context).load(someurl).fit().placeholder(someplaceholder).into(sometarget)..

3 个解决方案

#1

Picasso supports this by it's skipMemoryCache() in the Picasso builder. An example is shown below.

Picasso通过Picasso构建器中的skipMemoryCache()来支持它。一个例子如下所示。

Picasso.with(context).load(imageUrl)
                .error(R.drawable.error)
                .placeholder(R.drawable.placeholder)
                .skipMemoryCache()
                .into(imageView);

With the new API you should use it like this so that it skips looking for it and storing it in the cache:

使用新API,您应该像这样使用它,以便它跳过查找它并将其存储在缓存中:

Picasso.with(context).load(imageUrl)
            .error(R.drawable.error)
            .placeholder(R.drawable.placeholder)
            .memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE)
            .into(imageView);

NO_CACHE

Skips memory cache lookup when processing a request.

处理请求时跳过内存缓存查找。

NO_STORE

Skips storing the final result into memory cache. Useful for one-off requests to avoid evicting other bitmaps from the cache.

跳过将最终结果存储到内存缓存中。对于一次性请求很有用,可以避免从缓存中驱逐其他位图。

#2

For picasso:2.71828 or above version use the following for skipping using disk cache networkPolicy(NetworkPolicy.NO_CACHE) :

对于picasso:2.71828或更高版本,使用以下内容跳过使用磁盘缓存networkPolicy(NetworkPolicy.NO_CACHE):

  Picasso.get()
            .load(camera_url)
            .placeholder(R.drawable.loader2)
            .networkPolicy(NetworkPolicy.NO_CACHE, NetworkPolicy.NO_STORE)
            .into(img_cam_view);

#3

just append this at the end of url.

只需将其附加到网址的末尾即可。

"?=" + System.currentTimeMillis();

#1