Question

I’m making an app for 1.6 and I’m having a problem with android image scaling, I have a picture that’s 480×295.

On a medium screen this appears correctly, but on a large screen (480×800 or 480×854) it doesn’t fill the screen, it android makes the image 1.5x bigger, which is only 720×442.

As 800 is actually 1.67 and 854 is 1.78, I can obviously just include large images for the drawable-hdpi folder, but the image is already 1.5mb, which is larger than people seem to like, and I can’t use app2sd as I want to support 1.6.

Any suggestions?

I can only think of three options:
1) Include the larger images (but that limits sales probably, and obviously increases the apk size)

2) Make 2 versions, seems a good solution, just harder to implement.

3) Change to 1.5, and handle all my scaling myself.

EDIT:
More details:
I’m drawing using canvas and surfaceview
Image loading code:

backgroundBMP = BitmapFactory.decodeResource(getResources(), R.drawable.background, null);

And the drawing code:

canvas.drawBitmap(backgroundBMP, 0, 0, null);

Answer 1

If you wanna scale your Bitmap you can do that by using canvas.scale(scaleX, scaleY); before canvas.drawBitmap(). You could calculate the aspect ratio and use that as your scale value.

One important thing to add is that you can use the “Move to SD card” feature using <uses-sdk android:minSdkVersion="3" /> and still support lower Android versions, specified by minSdkVersion.