I have an application where you have an image and you can add
different filters to it. I also have undo and redo buttons that work
by having a picture of every change.so they can be undone. This
worked perfectly in 2.3 but in 4.0 when I press undo the previous
picture that is drawn looks the same as the very last frame as if it
was being changed when the new picture was added.
So in 2.3 I had an array of pictures that always contained the
original pictures that I put in.
In 4.0 the pictures in the array change to match the last picture that
I added.
Here is some example code.
newpixels is the new array of pixels for the image to be set to.
public void addNewPicture(int[] newpixels)
{
Bitmap newbitmap = Bitmap.createBitmap(canvaswidth,
canvasheight, mybitmap.getConfig());
newbitmap.setPixels(newpixels, 0, canvaswidth, 0, 0,
canvaswidth, canvasheight);
Picture picture = new Picture();
Canvas c= picture.beginRecording(canvaswidth,
canvasheight);
c.drawBitmap(newbitmap, 0, 0, null);
picture.endRecording();
picturearray.add(picture);
}
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