Glide Bitmap Pool is a memory management library for reusing the bitmap memory. As it reuses bitmap memory , so no more GC calling again and again , hence smooth running application. It uses inBitmap while decoding the bitmap on the supported android versions. All the version use-cases has been handled to optimize it better.
- Glide , Fresco and Android Networking uses Bitmap Pool Concept to load images efficiently.
An Image heavy Application decodes many images , so there will be continuous allocation and deallocation of memory in application , and that results in very frequent calling of GC(Garbage Collector). And finally because of very frequent calling of GC , the application UI freezes. Use Bitmap pool to avoid continuous allocation and deallocation of memory in application and reduce GC overhead that will result in smooth running application. Suppose we have to load few bitmap in Android Application. When we load bitmapOne , it will allocate the memory for bitmapOne. Then if we don’t need bitmapOne , do not recycle bitmap (as if you recycle, it will make GC to be called) , so use this bitmapOne as an inBitmap for bitmapTwo so that , the same memory can be reused for bitmapTwo. In this way , we can avoid continuous allocation and deallocation of memory in application and reduce GC overhead. But the problem is that there are few restrictions as android version less than Honeycomb does not supports it , few android version less than Kitkat only when we use inSampleSize = 1 , above that it supports completely and few other issues. So , all these types of cases are handled in this library
Glide Bitmap Pool can be included in any Android or Java application.
Glide Bitmap Pool supports Android 2.3 (Gingerbread) and later.
Add this in your build.gradle
compile 'com.amitshekhar.android:glide-bitmap-pool:0.0.1'
Then initialize it in onCreate() Method of application class, :
GlideBitmapPool.initialize(10 * 1024 * 1024); // 10mb max memory size
Bitmap bitmap = GlideBitmapFactory.decodeFile(filePath);
Bitmap bitmap = GlideBitmapFactory.decodeResource(getResources(), R.drawable.testImage);
Bitmap bitmap = GlideBitmapFactory.decodeFile(filePath,100,100);
GlideBitmapPool.putBitmap(bitmap);
Bitmap bitmap = GlideBitmapPool.getBitmap(width, height, config);
GlideBitmapPool.clearMemory();
GlideBitmapPool.trimMemory(level);
// ------ decoding -------
// old code
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.test1);
// new code
Bitmap bitmap = GlideBitmapFactory.decodeResource(getResources(), R.drawable.test1);
// ------ recycling -------
// old code
bitmap.recycle();
// new code
GlideBitmapPool.putBitmap(bitmap);
// ------ creating a bitmap -------
// old code
Bitmap bitmap = Bitmap.create(width, height, config);
// new code
Bitmap bitmap = GlideBitmapPool.getBitmap(width, height, config);
// Do not use bitmap.recycle();
// use GlideBitmapPool.putBitmap(bitmap); as it will put bitmap in the pool for further reuse.
// Do not use Bitmap.create(width, height, config);
// use GlideBitmapPool.getBitmap(width, height, config); as it returns bitmap from the pool that can be reused.
- Glide - As it uses the same bitmap pool that is used by Glide
- Managing Bitmap Memory
- Loading Large Bitmaps Efficiently
- More Optimization with further updates.
Copyright (C) 2016 Amit Shekhar
Copyright (C) 2011 Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Just make pull request. You are in!