Develop Reference

How to make bitmap loading faster in Android?

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.

Set thumbnail to an Intent for VideoView

I have to play a video in one of my screens of Android and I am using Video View intent for the same. The video gets played but there is no thumbnail appearing on the launch of the screen.
My code is like this
#OnClick(R.id.icon_play)
protected void playVideo(){
String videoUrl="https://someUrl/Video/v07.mp4";
if(!videoUrl.isEmpty()) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(videoUrl));
intent.setDataAndType(Uri.parse(videoUrl), "video/mp4");
startActivity(intent);
}
}
By thumbnail, I mean that when the screen is launched each video should have an image of its own. (something like YouTube)
I tried seekTo() for attaching the thumbnail, but it didn't work.
Please Help. Thanks.

I solve the problem using MediaMetaDataRetriever.
The code goes like this-
public static Bitmap retriveVideoFrameFromVideo(String videoPath)
throws Throwable
{
Bitmap bitmap = null;
MediaMetadataRetriever mediaMetadataRetriever = null;
try
{
mediaMetadataRetriever = new MediaMetadataRetriever();
if (Build.VERSION.SDK_INT >= 14)
mediaMetadataRetriever.setDataSource(videoPath, new HashMap<String, String>());
else
mediaMetadataRetriever.setDataSource(videoPath);
// mediaMetadataRetriever.setDataSource(videoPath);
bitmap = mediaMetadataRetriever.getFrameAtTime(-1,MediaMetadataRetriever.OPTION_CLOSEST);
}
catch (Exception e)
{
e.printStackTrace();
throw new Throwable(
"Exception in retriveVideoFrameFromVideo(String videoPath)"
+ e.getMessage());
}
finally
{
if (mediaMetadataRetriever != null)
{
mediaMetadataRetriever.release();
}
}
return bitmap;
}
Note that : Because my video link was in the form of server URL, that's why createThumnailUtils was returning a null when video Url was passed through it.
The below code works fine when the video is coming from local storage.
Bitmap thumbnail = ThumbnailUtils.createVideoThumbnail("URL", MediaStore.Images.Thumbnails.MINI_KIND);
BitmapDrawable bitmapD = new BitmapDrawable(thumbnail);
VideoView.setBackground(Drawable bitmapD);
Hope this helps someone!!

Just looked at another example. Not 100% sure if it's going to work but worth a try.
Bitmap thumbnail = ThumbnailUtils.createVideoThumbnail("URL", MediaStore.Images.Thumbnails.MINI_KIND);
BitmapDrawable bitmapD = new BitmapDrawable(thumbnail);
VideoView.setBackground(Drawable bitmapD);
Please note, I have written this over phone so there might be spelling errors.
Let me know if this works or if you find another alternative

this may be used i am using this method for thumbnail image of video on my list view of video player..
Cursor cursor = mContext.getContentResolver().query(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, proj,
MediaStore.Video.Media.DISPLAY_NAME + "=?",
new String[]{localItem._display_name}, null);
cursor.moveToFirst();
long ids = cursor.getLong(cursor
.getColumnIndex(MediaStore.Video.Media._ID));
ContentResolver crThumb = mContext.getContentResolver();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
Bitmap curThumb = MediaStore.Video.Thumbnails.getThumbnail(
crThumb, ids, MediaStore.Video.Thumbnails.MICRO_KIND,
options);
itemHolder.thumbImage.setImageBitmap(curThumb);
curThumb = null;
cursor.close();
try this way it may be helpful
above ans is now deprecated.
new updated answer with fast one solution
we just have to give the video data path
Bitmap bmThumbnail;
bmThumbnail = ThumbnailUtils.createVideoThumbnail(arraylist.get(i)._data, MediaStore.Video.Thumbnails.MICRO_KIND);
itemHolder.thumbImage.setImageBitmap(bmThumbnail);
where arraylist.get(i)._data => path of video.
and best way is to use Glide or any other image lodging async library for smooth scrolling of listview.

Bitmap loading very slow

I'm using this method for loading albumArt in list
long thisAlbum = musicCursor.getLong(albumColumn);
Bitmap artWork = null;
Uri sArtworkUri = Uri
.parse("content://media/external/audio/albumart");
Uri albumArtUri = ContentUris.withAppendedId(sArtworkUri, thisAlbum);
try {
artWork = MediaStore.Images.Media.getBitmap(
musicResolver, albumArtUri);
artWork = Bitmap.createScaledBitmap(artWork, 150, 150, true);
} catch (FileNotFoundException exception) {
exception.printStackTrace();
artWork = BitmapFactory.decodeResource(getResources(),
R.drawable.no_cover);
} catch (IOException e) {
e.printStackTrace();
}
songsList.add(new Songs(thisId, thisTitle, thisArtist, artWork));
}
everything is working fine but when i open my activity it takes more then 10 seconds to load the activity and when i remove this bunch of code activity open as normally ,can anyone tell me please why it is happening and please tell me also what to do or any update for code

Instead of Bitmap I always use glide library(It gives smoothness to app)
So just add it in build.gradle(Module App)
compile 'com.github.bumptech.glide:glide:3.7.0
code to load image in imageview using glide
Glide.with(context).load(imagePath).crossFade().diskCacheStrategy(DiskCacheStrategy.ALL).thumbnail(0.5f).into(imageView);
I Hope It will Help You :)

You are trying to make the bitmap from the images from your phone.
I think the images in your phone are too large.
You can use Glide to make Bitmap for your local image.
Glide.with(mContext)
.load(new File(pictureUri.getPath())) // Uri of the picture
.asBitmap().
into(100, 100). // Width and height
get();
Remember to run this code within AsyncTask or Thread.
Hope it will helpfull to you.

How do I preload multiple images using Glide for later use

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.

Load Drawable object into ImageView using Picasso or Glide or any cashing library - Android

I need to load App icon into image view. It is too slow to load it in list view.
I tried to use Picasso or Glide to load it.
I could not find out how to load Drawable object (NOT FROM RESOURCES) into image view using any of those libraries?
The function for getting the drawable:
public Drawable getIcon() {
if (icon == null) {
icon = getResolveInfo().loadIcon(ctx.getPackageManager());
}
return icon;
}

You can do this
Drawable icon = ....
Bitmap bitmap = ((BitmapDrawable) icon).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] bitmapdata = stream.toByteArray();
Glide.with(context)
.load(bitmapdata)
.into(imageView);
But i am not sure that in this case the Glide (or Picasso) will be use the cache.

You can create your own RequestHandler for Picasso. There is a tutorial here.
For example,
class AppIconRequestHandler extends RequestHandler {
#Override
public boolean canHandleRequest(Request data) {
return true; // or do validation here
}
#Override
public Result load(Request request, int networkPolicy) {
// Not sure if DISK or correct or if it should be something else, but it works for me.
return new Result(yourApp.getIcon().bitmap, Picasso.LoadedFrom.DISK);
}
}
// When you want to show the icon
Picasso picasso = Picasso.Builder(context)
.addRequestHandler(new AppIconRequestHandler())
.build()
picasso.load(packageName)
.placeholder(placeholderIcon)
.into(imageView)
Don't forget to scale app icons, by the way! You can't rely on them to be small images and you may end up using a lot more ram than you need.

This one is using the Picasso library.
String url = "some url to your image";
ImageView thumbnail = (ImageView) findViewById(R.id.thumbnail);
Picasso.with(context).load(url).into(thumbnail);