Rotating images on android. Is there a better way?

Question

I have an app that displays quite a few images for the user, and we\'ve been seeing a lot of error reports with OutOfMemoryError exception.

What we curr

Answer 1

When working with lots of Bitmaps be sure to call recycle() on them as soon as they are not needed. This call will instantly free memory associated with a particular bitmap.

In your case if you do not need the original bitmap after rotation, then recycle it. Something along the lines of:

Bitmap result = bmp;

// Check if image is a landscape image
if (bmp.getWidth() > bmp.getHeight()) {
    // Rotate it to show as a landscape
    Matrix m = image.getImageMatrix();
    m.postRotate(90);
    result = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), m, true);
    // rotating done, original not needed => recycle()
    bmp.recycle();
}

image.setImageBitmap(result);