I have many images that I want to preload and use later on. I want to make it so that I can load an image, hide it, and then load it again whenever I want.
https://github.com/bumptech/glide/wiki/Loading-and-Caching-on-Background-Threads#into
I have tried following this, but it doesn't work.
Here is my code:
private void loadImage() throws ExecutionException, InterruptedException {
FutureTarget<File> future = Glide.with(this)
.load(R.drawable.image1)
.downloadOnly(500, 500);
File cacheFile = future.get();
Bitmap myBitmap = Glide.with(this)
.load(cacheFile)
.asBitmap()
.centerCrop()
.into(500, 500)
.get();
Glide.with(this).load(myBitmap).into(image_name);
}
I tried using Picasso because I read that this can easily be done in it, but the images take really long to load in Picasso.
Related
I have a code that loads the thumbnail of the image and feeds it to glide. Then glide will load in the holder. but, As I am loading the thumbnail it returns a bitmap. SO, I am passing bitmap to glide. But, this takes nearly 30sec for initial loading. I mean in the gallery there are lots of photos. So, when the gallery is opened it won't show images for 30sec at all. And then it will show the bitmaps.
on the other hand, if I use URI to feed to glide it will load it immediately. But, Images are being loaded in recycler view. So, only some images will be loaded at the time.
After some images are loaded. When we swipe up and see other photos loading speed then obviously bitmap fed images are loaded way faster than URI fed images. But, bitmap takes 30sec of initial loading time.
Is there any way to make this bitmap load faster?
...
while (cursor.moveToNext()) {
Log.d("FetchImages(): ", " Started");
Bitmap thumbBitmap = null;
int _thumpId = cursor.getInt(column_index_data);
Uri uri1 = ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, _thumpId);
Size thumbSize = new Size(150, 150);
try {
thumbBitmap = getApplicationContext().getContentResolver().loadThumbnail(uri1, thumbSize, null);
} catch (IOException e) {e.printStackTrace();}
ImageModel ImageModel = new ImageModel();
ImageModel.setBitmap(thumbBitmap);
arrayList.add(ImageModel);
}
Log.d("FetchImages(): ", " Ended");
runOnUiThread(() -> {
Adapter Adapter = new Adapter(getApplicationContext(), arrayList, MainActivity.this);
recyclerView.setAdapter(Adapter);
cursor.close();
Log.d("FetchImages(): ", " RecyclerView Adapter attached");
});
...
Glide .with(context) .load(url).apply(new RequestOptions().override(150, 150)) //for resizing .into(imageView);
No need to create bitmap it takes more computation .
Glide is more faster and efficient.
And still if you want to use bitmap then use AsycTask so it wont block main thread and program will not hang.
I have recyclerview and in every row I have an image that I load with firebase storage. It seems like the image loading is affecting the scrolling performance of the recyclerView.
I am using glide to load the images that I got from firebase inside onBindViewHolder by calling imageLoadGlide method like this:
//Download image from firebase Storage and set gameImage("ImageView") image.
private void imageLoadGlide(DocumentSnapshot documentSnapshot, final QuestionsHolder questionsHolder) {
//for firebase storage
FirebaseStorage storage = FirebaseStorage.getInstance();
// Create a storage reference from our app
StorageReference storageRef = storage.getReference();
storageRef.child(documentSnapshot
.get("image").toString())
.getDownloadUrl()
.addOnSuccessListener(new OnSuccessListener<Uri>() {
#Override
public void onSuccess(Uri uri) {
//this part is loading image from url library
Glide
.with(context.getApplicationContext()) // pass Context
.load(uri)// pass the image url
.centerCrop() // optional scaletype
.crossFade() //optional - to enable image crossfading
.transform(new CircleTransform(context))//transfoms the imageView onto circle with the custon class CircleTransform
.into(questionsHolder.gameImage); // the ImageView to which the image is to be loaded
//stop the loading bar from spinning
questionsHolder.loadProgress.setVisibility(View.GONE);
}
});
}
The download works fine but it makes the scrolling super slow.
I have no idea why this is happening because I compress the images before uploading them so I don't think that this is a problem of image weight.
The image compress is made like this :
Bitmap bitmap = ((BitmapDrawable) questionImage.getDrawable()).getBitmap();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 10, baos);
byte[] data = baos.toByteArray();
UploadTask uploadTask = mountainImagesRef.putBytes(data);
Any ideas on why this is happening and how can I avoid this?
Here is onBindViewHolder for #Vadim Eksler request:
#Override
public void onBindViewHolder(#NonNull final QuestionsHolder holder, final int position) {
holder.gameImage.setImageBitmap(null);
setInfoForViews(holder, result.get(position));
imageLoadGlide(result.get(position), holder);
setOnClicksListners(holder, position);
setRankTextView(position, holder);
if (position == result.size() - 1 && !endOfDocs && next != null) {
loadMoreDocs(position);
}
}
This answer is based on all the comments together.
So as mentioned in the comments what I did wrong is that every time that onBindViewHolder was called I have pulled the image from firebase again and again - this causes poorly recyclerView performance.
What I did to fix it:
I have used flyweight design pattern to load the image only for the first time from firebase and after that simply recycle this image for the next time onBindViewHolder will get called.
First I created a map as a global variable:
private Map<String, Bitmap> flyweight = new HashMap<>();
after that when the image is loaded from the first time I will save it for later when onBindViewHolder will get called again:
Inside onBindViewHolder :
if (flyweight.get(result.get(position).get("image").toString()) == null) {
imageLoadGlide(result.get(position), holder); // load the image
} else {
//recycle the image that i already have
holder.gameImage.setImageBitmap(flyweight.get(result.get(position).get("image").toString()));
}
And the last thing is to add my image to the map that I created after the image is successfully pulled :
flyweight.put(documentSnapshot.get("image").toString(), resource);
I want to show a video thumbnail in an ImageView from a video path on storage. Is there a function that takes a video path and returns a bitmap of a thumbnail? I get the video path by this code:
public ArrayList<String> getAllMedia() {
HashSet<String> videoItemHashSet = new HashSet<>();
String[] projection = {MediaStore.Video.VideoColumns.DATA, MediaStore.Video.Media.DISPLAY_NAME};
Cursor cursor = getContext().getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, projection, null, null, null);
try {
cursor.moveToFirst();
do {
videoItemHashSet.add((cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA))));
} while(cursor.moveToNext());
cursor.close();
} catch(Exception e) {
e.printStackTrace();
}
ArrayList<String> downloadedList = new ArrayList<>(videoItemHashSet);
return downloadedList;
}
It is the default way to create a thumbnail.
For Mini Kind
Bitmap thumb;
//MINI_KIND, size: 512 x 384 thumbnail
thumb = ThumbnailUtils.createVideoThumbnail(filePath, MediaStore.Video.Thumbnails.MINI_KIND);
img_tumbnail.setImageBitmap(thumb);
For Micro Kind
Bitmap thumb;
//MICRO_KIND, size: 96 x 96 thumbnail
thumb= ThumbnailUtils.createVideoThumbnail(filePath, Thumbnails.MICRO_KIND);
img_tumbnail.setImageBitmap(thumb);
Also, you can use Glide for Url as well as Video path of Device.
Glide.with(context).with(this)
.asBitmap()
.load(videoFilePath) // or URI/path
.into(imgView); //imageview to set thumbnail to
also, you can resize thumbnail by using .override(50,50) with Glide.
Use Glide lib
to show thumbnail from local storage
String filePath = "/storage/emulated/0/Pictures/example_video.mp4";
GlideApp
.with(context)
.asBitmap()
.load(Uri.fromFile(new File(filePath)))
.into(imageViewGifAsBitmap);
You can use ThumbnailUtils to load video thumb in 3 format:
MINI_KIND : Good for media detail view
FULL_SCREEN_KIND : Good for header
MICRO_KIND : Good for recycleView
Ex:
holder.videoThumb.setImageBitmap(ThumbnailUtils.createVideoThumbnail(getItem(position).videoURL, MediaStore.Images.Thumbnails.MICRO_KIND))
The biggest drawback is that ThumbnailUtils operate on UI thread so if you try to use this method in a recycleView then it gone make your app skip frames. Your RecycleView will have laggy scroll and if you have more than 7 items then your app will start throwing ANR.
That means you need to create AsyncTask or Threads which again might lead to memory leaks.
Conclusion; Glide is better in loading video thumbs.
Here DiskCacheStrategy.RESULT is important parameter which worked for me and give a smooth fast scroll in recycle view.
Glide.with(context).load(getItem(position).videoURL)
.asBitmap()
.placeholder(R.drawable.app_icon)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.RESULT)
.into(holder.videoThumb)
I have 3rd method to set thumbnail of image/video.
Hope it will help you.
1) ThumbnailUtils --> Effective but Slow
Bitmap thumb = ThumbnailUtils.createVideoThumbnail(thumbPath, MediaStore.Video.Thumbnails.MINI_KIND);
holder.ivThumb.setImageBitmap(thumb);
2) FFmpegMediaMetadataRetriever --> Very Effective but Slow
FFmpegMediaMetadataRetriever retriever = new FFmpegMediaMetadataRetriever();
try {
retriever.setDataSource(thumbPath);
thumb.setImageBitmap(retriever.getFrameAtTime(0));
} catch (Exception ex) {
// Assume this is a corrupt file
}
3) Glide --> Effective and Fast
RequestOptions options = new RequestOptions()
.centerCrop()
.placeholder(android.R.drawable.stat_notify_error)
.error(android.R.drawable.stat_notify_error);
Glide.with(context)
.load(thumPath)
.apply(options)
.into(thumb);
If anyone is looking for a Kotlin version. You can try this extension function.
It is using coil.
/**
* https://github.com/coil-kt/coil/issues/413
*/
fun ImageView.setThumbnail(uri: Uri, frameMillis: Long = 2000) {
val imageLoader = ImageLoader.Builder(context)
.componentRegistry {
add(VideoFrameFileFetcher(context))
add(VideoFrameUriFetcher(context))
}.build()
val request = ImageRequest.Builder(context)
.data(uri)
.videoFrameMillis(frameMillis)
.target(this)
.fetcher(VideoFrameUriFetcher(context))
.build()
findViewTreeLifecycleOwner()?.lifecycleScope?.launch(Dispatchers.Main) {
imageLoader.execute(request)
}
}
In some devices not working for me without FileDescriptorBitmapDecoder
So I used following code with FileDescriptorBitmapDecoder
public static void loadLocalVideoThumbanail(Context context, String path, final ImageView imageView) {
try {
if (path == null || path.isEmpty())
return;
BitmapPool bitmapPool = Glide.get(context).getBitmapPool();
int microSecond = 1000000;// 1st second as an example
VideoBitmapDecoder videoBitmapDecoder = new VideoBitmapDecoder(microSecond);
FileDescriptorBitmapDecoder fileDescriptorBitmapDecoder = new FileDescriptorBitmapDecoder(videoBitmapDecoder, bitmapPool, DecodeFormat.PREFER_ARGB_8888);
Glide.with(context).load(path).asBitmap().thumbnail(0.6f)
.diskCacheStrategy(DiskCacheStrategy.RESULT)
.dontAnimate()
.videoDecoder(fileDescriptorBitmapDecoder)
.override(200,200)
.into(imageView);
} catch (Exception e) {
MyLog.e(TAG, "LoadImage: ", e);
}
}
#Override
public void onBindViewHolder(final ViewHolder holder ,int position) {
Glide.with(c)
.load(images.get(position))
.placeholder(R.mipmap.ic_launcher)
.into(holder.img);
holder.img.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
try{
String fileName = "bitmap.png";
FileOutputStream stream = c.openFileOutput(fileName,Context.MODE_PRIVATE);
Intent showBigPicture = new Intent(c,showBigPicture.class);
Bitmap bitmapImage = BitmapFactory.decodeFile(images.get(position));
bitmapImage.compress(Bitmap.CompressFormat.PNG,100,stream);
stream.close();
bitmapImage.recycle();
showBigPicture.putExtra("image",fileName);
c.startActivity(showBigPicture);
}catch (Exception e){
e.printStackTrace();
}
}
});
}
this is showing in logCat " Unable to decode stream: java.io.FileNotFoundException: android.support.v7.widget.AppCompatImageView{e22d977 V.ED..C. ...P.... 0,0-540,890 #7f0b0061 app:id/img}: open failed: ENOENT (No such file or directory)"
I believe you want to follow this answer on saving Bitmap images. I believe the reason you're getting a FileNotFoundException is because you're providing the URI to a file that doesn't exist yet to the decodeFile function that's quite possibly a URL from what I can tell. In short, to save a bitmap:
Create a new File(filename)
Decode file using getName on the File from step 1
Create FileOutputStream from File
Compress the bitmap image into the FileOutputStream
From what I can surmise from your question, it looks as though you're showing a images in a RecyclerView and when an image is clicked, you want to open another activity which shows a version of the full image. If that's close to your use-case, and you're using Glide, I would recommend taking advantage of its built-in automatic caching feature to reduce network calls instead of manually saving the file.
By default, disk and memory-based caching is enabled in Glide as long as the same filename, path, or URL are used to obtain the image on each Glide.load(...). If you'd like to manipulate how the caching occurs, use the DiskCacheStrategy enum to control that every time you load the image:
Glide.with(c)
.load(images.get(position))
.diskCacheStrategy(DiskCacheStrategy.SOURCE) # Will cache the source downloaded image before any transformations are applied
.placeholder(R.mipmap.ic_launcher)
.into(holder.img);
If you still want to save the file for other reasons, use a SimpleTarget instead of loading directly into your ImageView like so:
Glide.with(c)
.load(images.get(position))
.diskCacheStrategy(DiskCacheStrategy.SOURCE) # Will cache the source downloaded image before any transformations are applied
.placeholder(R.mipmap.ic_launcher)
.asBitmap()
.into(new SimpleTarget<GlideDrawable>() {
#Override
public void onResourceReady(Bitmap bitmap, GlideAnimation anim) {
holder.img.setImageDrawable(new BitmapDrawable(bitmap));
saveImage(bitmap); # This being an encapsulation of the steps outlined earlier
}
});
I have spent a lot of time trolling through multiple different threads concerning this topic, but I have yet to find an answer that works well with my code (Android SDK 23, in 2016). A lot of the answers are deprecated, and others just flat-out don't work like they're supposed to, and I was wondering if I could get a solid answer on this:
I am trying to include a Pokemon sprite (static image) in my program from Serebii. nums is a variable indicating the Pokemon's dex number (this one functions correctly, I promise). And this code is running in the main UI thread, which I know is frowned upon, but right now I'm trying to get the image loading, and then the smoothness of the app down. I don't really need a Bitmap, per se, but I need my ImageView to update and display the image given by the URL. How do I do it?
URL url = null;
try {
url = new URL("http://www.serebii.net/xy/pokemon/" + nums + ".png");
} catch (MalformedURLException e) {
e.printStackTrace();
}
Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
mImageView.setImageBitmap(bmp);
Just use Picasso library, it will do all your image loading. You only need to provide the url of the image correctly.
String url = "http://www.serebii.net/xy/pokemon/" + nums + ".png";
Picasso.with(yourContext)
.load(url)
.into(mImageView);
You can use Picasso Library to load images.
a) Add Gradle into your project.
compile 'com.squareup.picasso:picasso:2.5.2'
b) Usage
Picasso.with(context).load("http://www.serebii.net/xy/pokemon/" + nums + ".png").into(imageView);
Also there are another libraries, you can use like
Fresco by Facebook, Universal Image loader
You can try using Picasso as:
Picasso.with(context)
.load(url)
.into(imageview);
Or use Universal Image loader as:
ImageLoader imageLoader = new ImageLoader(context);
imageLoader.displayImage(imageUri, imageView);
Use the Piassco library for it..Library link
For setting the Bitmap on the ImageView
Picasso.with(getContext()).load("your url").into(new Target() {
#Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
//do what ever you want with your bitmap
imgView.setImageBitmap(loadedImage);///imgView is use to set the image in it
}
#Override
public void onBitmapFailed(Drawable errorDrawable) {
}
#Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
});
And another method of Picasso :-
Picasso.with(this)
.load("your_image_url")
.placeholder(R.drawable.no_image)
.error(android.R.drawable.stat_notify_error)
.networkPolicy(NetworkPolicy.OFFLINE)//user this for offline support
.into(YOUR_IMAEGVIEW);
OR
You can also use the Universal Image Loader..Here is the link Universal image loader
ImageLoader imageLoader = ImageLoader.getInstance(); // Get singleton instance
ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(getActivity()));
imageLoader = com.nostra13.universalimageloader.core.ImageLoader.getInstance();
DisplayImageOptions options = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.YOUR_DRAWABLE)
.showImageForEmptyUri(R.drawable.YOUR_DRAWABLE)
.showImageOnFail(R.drawable.YOUR_DRAWABLE)
.cacheInMemory(true)
.cacheOnDisk(true)
.considerExifParams(true)
.build();
imageLoader.displayImage("your_image_url", YOUR_IMAGEVIEW, null);