Android: BitmapFactory.decodeStream() out of memory with a 400KB file with 2MB free heap

by

Android library is not so smart for loading images, so you have to create workarounds for this.

In my tests, Drawable.createFromStream uses more memory than BitmapFactory.decodeStream.

You may change the Color scheme to reduce memory (RGB_565), but the image will lose quality too:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Config.RGB_565;
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);

Reference: http://developer.android.com/reference/android/graphics/Bitmap.Config.html

You can also load a scaled image, which will decrease a lot the memory usage, but you have to know your images to not lose too much quality of it.

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);

Reference: http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html

To define the inSampleSize dynamically, you may want to know the image size to take your decision:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
bitmap = BitmapFactory.decodeStream(stream, null, options);
int imageHeight = options.outHeight;
int imageWidth = options.outWidth;

options.inJustDecodeBounds = false;
// recreate the stream
// make some calculation to define inSampleSize
options.inSampleSize = ?;
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);

You can customize the inSampleSize according to the screen size of the device. To get the screen size, you can do:

DisplayMetrics metrics = new DisplayMetrics();
((Activity) activity).getWindowManager().getDefaultDisplay().getMetrics(metrics);
int screenWidth = metrics.widthPixels;
int screenHeight =metrics.heightPixels;

Other tutorials:
– http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
– http://developer.android.com/training/displaying-bitmaps/index.html

More Related Contents:

  1. Detect application heap size in Android
  2. Android heap size on different phones/devices and OS versions
  3. Android Gradle Could not reserve enough space for object heap
  4. How to analyze memory using android studio
  5. Suggestions to avoid bitmap Out of Memory error
  6. EditText causing memory leak
  7. Invalid heap address and fatal signal 11
  8. Android Understanding Heap Sizes
  9. Passing data between a fragment and its container activity
  10. Get Selected Item Using Checkbox in Listview
  11. Using Alarmmanager to start a service at specific time
  12. How to set background color of a View
  13. Google Play Services Library update and missing symbol @integer/google_play_services_version
  14. How to handle cookies in httpUrlConnection using cookieManager
  15. Didn’t find class “com.google.firebase.provider.FirebaseInitProvider”?
  16. How to enable TLS 1.2 support in an Android application (running on Android 4.1 JB)
  17. Android: android.content.res.Resources$NotFoundException: String resource ID #0x5
  18. Why does AlertDialog.Builder(Context context) only accepts Activity as a parameter?
  19. Use Roboto font in app with minimum API level 14
  20. Threading Example in Android [closed]
  21. FindClass from any thread in Android JNI
  22. Passing touch events to the parent view
  23. getSize() giving me errors
  24. Play Youtube HTML5 embedded Video in Android WebView
  25. Passing a List to another Activity in Android
  26. How do I change the tint of an ImageButton on focus/press
  27. Go to settings screen
  28. Hide Year field in Android DatePicker?
  29. How to override the enter activity animation if it is stated by launcher
  30. Android : Draw Circle With Text Inside

Leave a Comment