I'm trying to clear the cache memory of Picasso via Android coding.
Can anyone please help me in this issue..?
I have tried using the following code, but this was not useful in my case:
Picasso.with(getActivity()).load(data.get(pos).getFeed_thumb_image()).skipMemoryCache().into(image);
请改用:
Picasso.with(getContext()).load(data.get(pos).getFeed_thumb_image()).memoryPolicy(MemoryPolicy.NO_CACHE).into(image);
Remove cache of Picasso like this.
public class Clear {
public static void clearCache (Picasso p) {
p.cache.clear();
}
}
This util class can clear the cache for you. You just have to call it:
Clear.clearCache(Picasso.with(context));
EDIT :
The class Clear must be in the package :
package com.squareup.picasso;
Because cache is not accessible from outside that package. Like in this answer: https://stackoverflow.com/a/23544650/4585226
if you are trying to load an image through Json(from db) try clearing the networkCache for a better result.
Picasso.with(context).load(uri).networkPolicy(NetworkPolicy.NO_CACHE)
.memoryPolicy(MemoryPolicy.NO_CACHE)
.placeholder(R.drawable.bv_logo_default).stableKey(id)
.into(viewImage_imageView);
When activity destroy, unfortunately bitmap was not recycled if we're using Picasso. I try to programmatically recycle bitmap, what's loaded in to image view. There is a way to reference to loaded bitmap by using Target
.
Target mBackgroundTarget = new Target() {
Bitmap mBitmap;
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
if (bitmap == null || bitmap.isRecycled())
return;
mBitmap = bitmap;
mBgImage.setImageBitmap(bitmap);
mHandler.post(new Runnable() {
@Override
public void run() {
// Do some animation
}
});
}
@Override
public void onBitmapFailed(Drawable errorDrawable) {
recycle();
}
@Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
/**
* Recycle bitmap to free memory
*/
private void recycle() {
if (mBitmap != null && !mBitmap.isRecycled()) {
mBitmap.recycle();
mBitmap = null;
System.gc();
}
}
};
And when Activity destroy, I call onBitmapFailed(null)
to recycle loaded bitmap.
@Override
protected void onDestroy() {
super.onDestroy();
try {
if (mBackgroundTarget != null) {
mBackgroundTarget.onBitmapFailed(null);
Picasso.with(context).cancelRequest(mBackgroundTarget);
}
} catch (Exception e) {
e.printStackTrace();
}
}
But remember, DON'T CACHE IMAGE IN MEMORY by this case, It will cause Use recycled bitmap exception.
Picasso.with(context)
.load(imageUrl)
.resize(width, height)
.memoryPolicy(MemoryPolicy.NO_CACHE)
.into(mBackgroundTarget);
Hope this help.
Instead of clearing the complete cache if one wants to refresh the image with the given Uri. try this Picasso.with(context).invalidate(uri);
it internally removes the key from the cache maintained by Picasso.
Excerpt from Picasso.java
/** * Invalidate all memory cached images for the specified {@code uri}. * * @see #invalidate(String) * @see #invalidate(File) */ public void invalidate(Uri uri) { if (uri == null) { throw new IllegalArgumentException("uri == null"); } cache.clearKeyUri(uri.toString()); }
/** * Invalidate all memory cached images for the specified {@code uri}. * * @see #invalidate(String) * @see #invalidate(File) */ public void invalidate(Uri uri) { if (uri == null) { throw new IllegalArgumentException("uri == null"); } cache.clearKeyUri(uri.toString()); }
If you keep reference of your custom Downloader
implementation you can clear cache.
public class PicassoUtil {
private static Picasso sInstance;
private static OkHttp22Downloader sDownloader;
public static Picasso getPicasso(Context context){
if(sInstance == null) {
sDownloader = new OkHttp22Downloader(context)
Picasso.Builder builder = new Picasso.Builder(context);
builder.downloader(sDownloader);
sInstance = builder.build(sDownloader);
}
return sInstance;
}
public static void clearCache(){
if(sDownloader != null){
sDownloader.clearCache();
}
}
}
It is important to have access to your http client and its Cache
. In my implementation there is access to the cache, hence clearing cache with clearCache()
method.
i had the same problem. It worked for me. I used Picasso in RecycleView inside a dialog . When i closed dialog, picasso doesnt clear cache. But while you are using the dialog it clears image cache . However there is some cache that is not cleared. Maybe the cache that was not cleared is the last you seen in dialog before dialog.dismiss().
use this memoryPolicy(MemoryPolicy.NO_CACHE,MemoryPolicy.NO_STORE)
Picasso.with(activity).load(file).resize(100,100).centerCrop().memoryPolicy(MemoryPolicy.NO_CACHE,MemoryPolicy.NO_STORE).into(contactImage, new com.squareup.picasso.Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
}
});
Picasso.with(this.getContext()).load(gamePlayer.getPlayerProfileUrl()).skipMemoryCache().into(iv);
这也有效
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