I have a question about pixels and screen resolution of an Android device.

The app I developed was the time when Samsung Galaxy SIII was new. The images for my app had a resolution 2310x1300 (ratio 1.777 to fit screen). Samsung Galaxy SIII has a resolution of 1280x720. I choosed a higher resolution to have some margin for future devices with larger screens and higher DPI. But tha'ts not enough these days - Galaxy S6 has a resolution of 2560x1440, that is far higher than the resolution of my images. So I thought that the quality of the images for such a device would be deteriorated since the resolution of the images is lower than the resolution of the display. But when testing the app for the Galaxy S6 I cannot see any differences right now - the images scaled for the new device (image resolution of 2310x1300 used in a device with 2560x1440) is at least as good as for an older device with lower resolution.

Have I completely misunderstood how dpi and resolution works?

The images resources are under the /res/drawable/hdpi folder.

I have a question about pixels and screen resolution of an Android device.

The app I developed was at the time when Samsung Galaxy S III was new. The images for my app had a resolution 2310x1300 (ratio 1.777 to fit screen). Samsung Galaxy S III has a resolution of 1280x720. I chose a higher resolution to have some margin for future devices with larger screens and higher DPI. 

But that's not enough these days - Galaxy S6 has a resolution of 2560x1440, that is far higher than the resolution of my images. So I thought that the quality of the images for such a device would be deteriorated since the resolution of the images is lower than the resolution of the display. But when testing the app for the Galaxy S6 I cannot see any differences right now - the images scaled for the new device (image resolution of 2310x1300 used in a device with 2560x1440) is at least as good as for an older device with lower resolution.

Have I completely misunderstood how dpi and resolution works?

The images resources are under the /res/drawable/hdpi folder.

I have a question about pixels and screen resolution of an android device.

The app I developed was the time when Samsung galaxy sIII was new. The images for my app had a resolution 2310 * 1300 (ratio 1.777 to fit screen). Samsung galaxy SIII has a resolution of 1280 * 720. I choosed a higher resolution to have some margin for future devices with larger screens and higher dpi. But thats not enough these days - Galaxy S6 has a resolution of 2560 * 1440, that is far higher than the resoultion of my images. SO - I thought, the quality of the images for such a device would be deteriorated since the resolution of the images is lower than the resolution of the display. BUt when testing the app for galaxy s6 I CANNOT se any differences right now - the images scaled for the new device (image res. of 2310 * 1300 used in a devive with 2660 * 1440) is at least as good as for an older device with lower resoultion.

Have I completely missunderstood how dpi and resolution works?

The images resources is put in the drawable hdpi folder

cincerely

I have a question about pixels and screen resolution of an Android device.

The app I developed was the time when Samsung Galaxy SIII was new. The images for my app had a resolution 2310x1300 (ratio 1.777 to fit screen). Samsung Galaxy SIII has a resolution of 1280x720. I choosed a higher resolution to have some margin for future devices with larger screens and higher DPI. But tha'ts not enough these days - Galaxy S6 has a resolution of 2560x1440, that is far higher than the resolution of my images. So I thought that the quality of the images for such a device would be deteriorated since the resolution of the images is lower than the resolution of the display. But when testing the app for the Galaxy S6 I cannot see any differences right now - the images scaled for the new device (image resolution of 2310x1300 used in a device with 2560x1440) is at least as good as for an older device with lower resolution.

Have I completely misunderstood how dpi and resolution works?

The images resources are under the /res/drawable/hdpi folder.