Question

I am trying to extend a scalable image viewer in Android to use two images side-by side. To do this I am using Bitmap.createBitmap(int, int, Bitmap.Config). Unfortunately this seems to be crashing the VM.

The code is

    protected void combineBitmaps() {
        image0Width = bitmap0.getWidth();
        image0Height = bitmap0.getHeight();
        image1Width = bitmap1.getWidth();
        image1Height = bitmap1.getHeight();

//These methods just get correct values for image[0|1][Width|Height].
        int width = getCanvasWidth();
        int height = getCanvasHeight();

//THIS LINE CRASHES
        Bitmap bitmap_tmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

        bitmap = bitmap_tmp;

        Canvas combination = new Canvas(bitmap);

        combination.drawBitmap(bitmap0, 0f, getImage0VertOffset(), null);
        combination.drawBitmap(bitmap1, image0Width, getImage1VertOffset(), null);
    }

The value I am getting from getCanvasWidth() is 2464 and from getCanvasHeight() is 2048. The exception I am getting is

Unable to start activity ComponentInfo{com.tse.scview/com.tse.scview.ScalableViewWrapper}: android.view.InflateException: Binary XML file line #8: Error inflating class com.tse.scview.ScalableFacingPageView

where com.tse.scview.ScalableFacingPageView is the class we’re constructing (the constructor calls this function).

I’ve isolated everything from this line—the assignment of the bitmap to a class bitmap, the get width and height functions etc.—to determine that it IS in fact Bitmap.createBitmap that is causing the problem. Unfortunately I can’t work out what the problem is.

Update: as a sanity check I put in small values for the width and height (12 and 13 … well why not). It now works. So it’s a RAM problem, which is a pain for us, but effectively answers the question.

Answer 1

If I am reading your code and question correctly, the bitmap is 2464 x 2048 x 4 bytes. That’s 16 megabytes. And you are creating two of them. That’s 32 megabytes.