PorterduffXfermode: Clear a section of a bitmap

by

The problem is hardware acceleration. Turn it OFF for the particular View that you are painting with CLEAR. If you’re using a custom view, do this in the constructors:

if (android.os.Build.VERSION.SDK_INT >= 11) 
{
     setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}

You can also call setLayerType on a view reference.

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. How to draw circle by canvas in Android?
  10. Recycle ImageView’s Bitmap
  11. Android Center text on canvas
  12. Android – Bitmap cache takes a lot of memory
  13. Image Orientation – Android
  14. Android : save a Bitmap to bmp file format
  15. How to draw a filled triangle in android canvas?
  16. BitmapFactory.decodeStream returning null when options are set
  17. Pixel-Perfect Collision Detection Android
  18. How I can convert a bitmap into PDF format in android [closed]
  19. Read an Image/file from External storage Android
  20. How to load tiles from a large bitmap in Android?
  21. How to add rectangles on top of existing rectangle in canvas
  22. Show an alertDialog from another Activity Android
  23. Delete data from ArrayList with a For-loop
  24. android.util.AndroidRuntimeException: requestFeature() must be called before adding content
  25. Android – Setting a Timeout for an AsyncTask?
  26. Playing BG Music Across Activities in Android
  27. Android – Copy assets to internal storage
  28. TCP\IP client – EHOSTUNREACH (No route to host)
  29. java.lang.NullPointerException: Attempt to invoke virtual method on a null object reference [duplicate]
  30. This view is not constrained

Leave a Comment