High dpi image drawing performance issues on canvas (android)

Asked Mar 23 '17 at 05:18

Active Mar 23 '17 at 05:18

Viewed 326 times

I download a image with following properties using AsyncTask and then resize and down sample using the logic in this url. In addition image loaded in ARGB_8888 config to in memory (image is a jpg file).

When I segment this image to small images and draw those segments to a canvas, drawbitmap() is significantly slow.

Questions

Is 600 dpi the issue?
Does'nt the down sampling take care of dpi scaling?
What is the best dpi for an app running on phones and tablets.

edited May 23 '17 at 12:10

Community

asked Mar 23 '17 at 05:18

pats

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in Android Devices its very devices to device. – Chetan Joshi Mar 23 '17 at 05:28
The images are stored in a remote server. Its hard store images for each device dpi. My issue is performance – pats Mar 23 '17 at 05:36
so you need to scale image each time according available space in device screen .other wise its leads to OOM Exception. – Chetan Joshi Mar 23 '17 at 05:40
Thanks, I do down sampling as mentioned. Dont get OOM issue, the issue is drawbitmap() is slow. – pats Mar 23 '17 at 05:44

High dpi image drawing performance issues on canvas (android)

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