How to priorly get future Glide image size which will be stored in cache in Android/Java?

Question

In MainActivity, I\'m loading some images using glide into recyclerview according to imageview size.

See:

 @Override
    public void onBindViewHolder(P         


        

Answer 1

Better to preload all the images with .downloadOnly() instead of using any target. Then load images using FileProvider.

private class CacheImage extends AsyncTask<String,Void,File> {
        @Override
        protected File doInBackground(String... strings) {
            try {
                return Glide.with(getContext())
                        .load(strings[0])
                        .downloadOnly(Target.SIZE_ORIGINAL,Target.SIZE_ORIGINAL)
                        .get();
            } catch (Exception e) {
                Log.e(LOG_TAG,e.getMessage());
                return null;
            }
        }

        @Override
        protected void onPostExecute(File file) {
            if(file!=null){
               Uri file_uri = FileProvider.getUriForFile(getContext(),
                        getContext().getPackageName()+".images",file);
            }
        }
    }

And store the path alongside URL in SQLite. Now get the image_url using FileProvider from SQLite

Glide.with(imageView.getContext())
                .load(<image_url>)
                .asBitmap()
                .dontAnimate()
                .centerCrop()
                .override(<width>,<height>)
                .priority(Priority.IMMEDIATE)
                .diskCacheStrategy(DiskCacheStrategy.SOURCE)
                .skipMemoryCache(true)
                .into(imageView);

You may also need to add,

In manifest, inside <application>

<provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="{app package name}.images"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
    </provider>

Inside res/xml, as file_paths.xml,

<paths xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    <cache-path name="images" path="image_manager_disk_cache"
        tools:path="DiskCache.Factory.DEFAULT_DISK_CACHE_DIR" />
</paths>