Android – Bitmap cache takes a lot of memory

by

Images are also scaled according to the density so they can use a lot of memory.

For example, if the image file is in the drawable folder (which is mdpi density) and you run it on an xhdpi device, both the width and the height would double. Maybe this link could help you, or this one.

So in your example the bytes the image file would take are :

(1024*2)*(800*2)*4 = 13,107,200 bytes.

It would be even worse if you ran it on an xxhdpi device (like the HTC one and Galaxy S4) .

What can you do? Either put the image file in the correct density folder (drawable-xhdpi or drawable-xxhdpi) or put it in drawable-nodpi (or in the assets folder) and downscale the image according to your needs.

BTW you don’t have to set options.inJustDecodeBounds = false since it’s the default behavior. In fact you can set null for the bitmap options.

About down scaling you can use either google’s way or my way each has its own advantages and disadvantages.

About caching there are many ways to do it. The most common one is LRU cache. There is also an alternative I’ve created recently (link here or here) that allows you to cache a lot more images and avoid having OOM but it gives you a lot of responsibility.

More Related Contents:

  1. How can I pass a Bitmap object from one activity to another
  2. converting Java bitmap to byte array
  3. bitmap size exceeds Vm budget error android
  4. Android load from URL to Bitmap
  5. How can I print an image on a Bluetooth printer in Android?
  6. BitmapFactory.decodeResource returns a mutable Bitmap in Android 2.2 and an immutable Bitmap in Android 1.6
  7. How to change a bitmap’s opacity?
  8. how to save bitmap to android gallery
  9. Recycle ImageView’s Bitmap
  10. Image Orientation – Android
  11. Android : save a Bitmap to bmp file format
  12. BitmapFactory.decodeStream returning null when options are set
  13. Pixel-Perfect Collision Detection Android
  14. How I can convert a bitmap into PDF format in android [closed]
  15. PorterduffXfermode: Clear a section of a bitmap
  16. Read an Image/file from External storage Android
  17. How to load tiles from a large bitmap in Android?
  18. how to increase counter on radio button is checked ? Android [closed]
  19. Date String to Milliseconds [duplicate]
  20. Getting frames from Video Image in Android
  21. How to parse JSON Array (Not Json Object) in Android
  22. Registering a headset button click with BroadcastReceiver in Android
  23. String.equals() with multiple conditions (and one action on result) [duplicate]
  24. Android: Switch camera when button clicked
  25. How to change package name of an Android Application
  26. How to include the Spongy Castle JAR in Android?
  27. Android Color Notification Icon
  28. Android Studio Convert ISO string to “America/New_York” when adding to event to calendar
  29. What is the maximum amount of data that a String can hold in java? [duplicate]
  30. org.gradle.api.tasks.TaskExecutionException: Execution failed for task ‘:app:transformClassesWithDexForDebug’

Leave a Comment