Can I change device DPI programmatically?

Question

I was wondering if I can change device which decides which layout it should choose or which graphic it should choose/scale. This change should only affect my application of course. Can I set somehow device DPI?

The reason why I'm doing that is this phone: http://www.gsmarena.com/samsung_p1000_galaxy_tab-3370.php it has very bad DPI od 240DPI while it's only 170PPI and should be recognized as 160DPI device. I have quite big graphic for layout-large which looks great on mdpi, but on hdpi they doesn't fit, they are just to big.

Maybe you have another solution than changing device DPI?

Answer 1

Yes it is possible. The following will set the dpi to 240. Although you have to refresh the activity somehow e.g. restart application.

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
metrics.density = 1.5f;
metrics.densityDpi = 240;
metrics.heightPixels = 1104;
metrics.widthPixels = 1920;
metrics.scaledDensity = 1.5f;
metrics.xdpi = 254.0f;
metrics.ydpi = 254.0f;
getResources().getDisplayMetrics().setTo(metrics);