Slow App with Background image

Question

I am making a small game for android. It is working smoothly when its working on a white background but when i want to put a background image, its becoming slower and slower. Fi

Answer 1

Recently i had the same issue and no answer helped me.But after playing with codes so many hours i found an amazing solution.What you have to do is copy your background image to all the drawable folders (drawable-hdpi,drawable-xhdpi...etc.) and thats it. And also my background image is png with 590kb file size. Be careful with image size because higher the size is slower the app. Hope this help to someone. :-)

Answer 2

The main reason you're noticing the lag is because the image needs to because you need to copy your background image to all the drawable folders (drawable-hdpi,drawable-xhdpi...etc.) . I use the Android Studio plugin named Android Drawable Importer for automating. Works like a charm.

Answer 3

For excellent performance use tiled background you can find nice explanation for it here

Answer 4

its pretty late but if someone else have the same problem ; on the draw it may try to resize again, you can use no-dpi (drawable-nodpi / drawable-sw600dp-nodpi) folder to skip resizing which requires so much cpu and time.

also something else may cause this , which i assume you forget to recycle old your bitmaps.

Answer 5

I was in the same position as you. I have a very simple app and it has lags when i add some background. Try this app 9-patch-resizer - Transform the image dimensions for all screens

And then comes this tool, that takes a xhdpi PNG file, or 9.png file, and generates ldpi, mdpi and hdpi png files automatically.

When it transoforms the image , move the each file to its own project folder (resources/mipmap-hdpi ,mipmap-xhdpi ...etc)

Answer 6

Background image Resolution to maintain smoothness

DPI	Size in Pixels
xxxhdpi	1280x1920
xxhdpi	960x1600
xhdpi	640x960
hdpi	480x800
mdpi	320x480
ldpi	240x320

You need to use background pictures matching the resolution as above to avoid lagging or being slow down.!

If you use high resolution images which exceeds the above restrictions would actually cause this issue and it's advisable to use only png