Is there a published size for xhdpi application icons? Or do we just use the hdpi ones at 72x72?
The supporting multiple screens page contains this image:
the image shows that every assets for xhdpi has two times the size of a mdpi asset.
Also Hackbod gave an answer in the Google Groups
XHDPI_SIZE = (HDPI_SIZE) * (XHDPI_DENSITITY / HDPI_DENSITY)
In other words, 2x the mdpi size.
Launcher Icon : 96x96
Related
I did some research and found that there 6 different sizes required by Android to display images properly on all sorts of devices.
LDPI - 0.75x
MDPI - Original size
HDPI - 1.5x
XHDPI - 2.0x
XXHDPI - 3x
XXXHDPI - 4.0x
So suppose I have 100x100 image as a baseline (MDPI), then ldpi, hdpi, xhdpi, xxhdpi will be as follows.
LDPI - 75x75
HDPI - 150x150
XHDPI - 200x200
XXHDPI - 300x300
XXXHDPI - 400x400
But I have confusion as to what should be the baseline(mdpi). How do I select my baseline, does it have to be based on something? I can have different images in my app example a back arrow, home arrow, a background image(full screen), an Add icon and so on. But all these icons have to different sizes. So how can I choose my baseline size?
No need to choose, the mdpi(baseline) density means that one dp is roughly equal to one pixel. So we call it the baseline density.
If we provide icon with size by the definition. We will get all the icon image have same physical size on different density screen(ldpi,mdpi,xdpi and so on) with proper quality.
About the background image, I would recommend to put the background image to drawable-nodpi which the image just fill entire screen no matter the density, so just put it there to let the system don`t scale the image and save some memory resources to scale it.
reference Support different pixel densities
Check if this can help you,
Material design icons
As a general rule, when storing image resources for use in an Android project, should they be placed in the res/drawable or the res/mipmap folder?
Apologies for the simple question, I'm relatively new to Android development. The IDE I'm using is Android Studio 1.0.
My rule is that if an image will have noticeable changes in quality when they are scaled up or down depending on the android device should be stored in mipmap folders. Examples of such images would be icons, slider bar scrubbers or custom google map markers. Images that don't get affected by changes in scale can be put in the drawable res folder.
The graphic resources are stored in corresponding folders “drawable”. A store application icons are stored in the folders “mipmap”. To make the icon you have to make the files with the identical name which will be differ by resolution only and will be placed in the correspondent folders “mipmap”. Here are the the dimensions in pixels for each screen density:
LDPI 36×36.
MDPI 48×48.
TVDPI 64×64.
HDPI 72×72.
XHDPI 96×96.
XXHDPI 144×144.
XXXHDPI 192×192.
When the screen density is not important, I create a simple “drawable” folder and I store there all images. If the screen density is important it is possible to calculate the dimensions of the image, based on the ratio of the size of the base image to the appropriate screen ratio. For the base density is taken MDPI (48 × 48):
LDPI — MDPIx0.75.
HDPI — MDPIx1.5.
TVDPI — MDPIx1.33.
XHDPI — MDPIx2.
XXHDPI — MDPIx3.
XXXHDPI — MDPIx4.
At the time of publication in the convenience store (play.google.com), you will need also 512 × 512 icon and picture for advertisment of 1024 × 500.
In the manifest, do not forget to register R.mipmap.your_icon_name (default R.mipmap.ic_launcher) and the system will automatically select the icon under the screen density
Images that don't get affected by changes in scale can be put in the drawable folder.
If you are building different versions of your app for different densities, you should know about the “mipmap” resource directory. This is exactly like “drawable” resources, except it does not participate in density stripping when creating different apk targets.
Provide at least an xxxhdpi app icon because devices can display large app icons on the launcher.
It’s best practice to place your app icons in mipmap- folders (not the drawable- folders) because they are used at resolutions different from the device’s current density.
I'm completely confused to the core reading various articles to understand to get my app to fit in to different screen sizes. basically the issue i am having is to have a logo fit in to screens with different screen densities. I've got an image with a resolution of 1616x369 which fits in to Nexus 7" tablet and nexus 10" tablets I guess because they contain hdpi screen densities(which looks perfectly fine). but if I change the preview on eclipse to a 10" wxvga screen size which seem to contain an mdpi resolution the image gets pixelated. I know this is because I haven't specified an image in the mdpi folder for android to pick it up, hence it picks up the image from the hdpi folder. What I don't understand is to what resolutions should I create images for mdpi and ldpi folders based on my original image.
I'm not exact sure where I got this information from, but I believe there is a link to it within the Iconography | Android Development documentation.
Density Launcher Action Bar Small/Contextual Notification
mdpi 48x48 px 32x32 px 16x16 px 24x24 px
hdpi 72x72 px 48x48 px 24x24 px 36x36 px
tvdpi (use hdpi) (use hdpi) (use hdpi) (use hdpi)
xhdpi 96x96 px 64x64 px 32x32 px 48x48 px
xxhdpi 144x144 px 96x96 px 48x48 px 72x72 px
The size of the images changes depending what type of image you want.
Launcher icons
Action bar and tab icons
Notification icons
Navigation drawer indicator
Generic icons
Depending of where you will use your image it changes the size, so have the correct set for what you are using.
Then don't forget to copy the image to the folders ldpi, mdpi and so on. If you do this right,you will not get images pixelated.
Just go to this site
http://romannurik.github.io/AndroidAssetStudio/index.html
Click in what type of image you want and generate, select one image for example and download, then you can see the correct sizes. Hope it helps you.
I am working on a Android Project.
I put the images (320*480) into the mdpi -folder. There are some information in Android developer site that 480*800 tablets(7") also takes images from the mdpi- folder. When the 7" tablet takes images form that mdpi- folder it become smaller. There is only one mdpi- folder so how do i exactly manage it .
You should read the Android developer documentation on Providing Alternative Resources.
From my answer to this similar question:
The ImageView will render the image inside of it at the correct resolution for the device. As per the documentation on providing resources, you must make sure that you provide resources at the correct DPI for each of the resolution types. Android will pick the best resource resolution for you, but if only one resource exists then it will pick that one and try to render at the device resolution.
So, find out the correct DPI for your device, and add the image (at the correct DPI) into that folder and it should appear at the correct size. If the image is placed in the wrong folder then it will appear a different size. Another useful link is the Density Independence documentation.
Note: let's assume your device is an HDPI device. The res/drawables/drawable-hdpi folder might not exit in your project but you can just add it in manually.
Don't mix up screen size with screen density. There are qualifiers related to screen size (e.g. small, normal, large, ...) and qualifiers related to density (e.g. ldpi, mdpi, ...).
You can even combine these qualifiers, for example in drawable-normal-mdpi you can put resources that will be used on devices with normal screen (phones) with a mdpi density.
you should create ldpi, hdpi, xhpi folder too. And you need to copy your image with same name by calculating its ratio.
ldpi - mdpi - hdpi - xhdpi
3 4 6 8
There is a 3:4:6:8 scaling ratio between the four primary densities
(ignoring the tvdpi density). So, a 9x9 bitmap in ldpi is 12x12 in
mdpi, 18x18 in hdpi and 24x24 in xhdpi.
If you decide that your image resources don't look good enough on a
television or other certain devices and want to try tvdpi resources,
the scaling factor is 1.33*mdpi. For example, a 100px x 100px image
for mdpi screens should be 133px x 133px for tvdpi.
I have created four versions of my launcher icon for ldpi, mdpi, hdpi and xhdpi devices. They are of dimensions 36x36, 48x48, 72x72 and 96x96.
I'm wondering what will happen when using a large screen. Consdering large screens are rouglhy 7" + in size a ldpi, large screen will surely not want a 32x32 icon image, located in a drawable-ldpi folder.
I cannot find anything on the dev guide that indicates what icon sizes to assign to large and xlarge devices. Presumably I would put a larger copy of the icon in the drawable-large and drawable-xlarge folder. However, I do not know what sizes to use. Does anyone have any recommendations?
Google provide an online tool called Android Assest Studio which creates the launcher icons in the correct size for you. http://android-ui-utils.googlecode.com/hg/asset-studio/dist/icons-launcher.html
A 7-10" tablet doesn't need anything unusually large. You don't need anything bigger than a 96x96 launcher icon for this use case. There is a table in the Launcher Icons section of the design docs that shows which sizes correspond to which densities.
Have a look at the Declaring Tablet Layouts section of the design docs for more info on how to organize resources for 7-10" screens. (Note that the resource used will depend on the screen density, it is possible that a 7" tablet will have an mdpi screen.)