from lint: Scoped storage is enforced on Android 10+ (or Android 11+ if using requestLegacyExternalStorage). In particular, WRITE_EXTERNAL_STORAGE will no longer provide write access to all files; it will provide the equivalent of READ_EXTERNAL_STORAGE instead.

The MANAGE_EXTERNAL_STORAGE permission can be used to manage all files, but it is rarely necessary and most apps on Google Play are not allowed to use it. Most apps should instead migrate to use scoped storage. To modify or delete files, apps should request write access from the user as described at https://goo.gle/android-mediastore-createwriterequest.

To learn more, read these resources: Play policy: https://goo.gle/policy-storage-help Allowable use cases: https://goo.gle/policy-storage-usecases
More info: https://goo.gle/android-storage-usecases

They should comply with a open license (public domain, creative commons, ..). Where can we find them? We can finetune them for the purpose.

Since the project is not too difficult we add them afterwards. Not very test driven, but works too.

So far only black&white pictures bundled with the app can be colored. It may be nice to color any picture the user provides. This would include some way of:

• Choosing the picture
• Make it black & white
• Start the color dialog with this converted picture
• Save it afterwards at a convenient location

Do we want that and how should it look like exactly?

Simultaneously with google play (or even before) publish it on F-Droid.

See also: https://f-droid.org/en/tutorials/create-repo/

both open source and closed-source. Note what they do better in this issue and propose new issues/tasks from it.

1-3 star ratings (initially none), show stars on the covers

Star rating (1-3 stars), initially none

Currently the app has png compressed black and white images of continuous lines and then using a custom fill algorithm for the coloring. It's not too difficult and works well except for very large images and complicated shapes where filling can take a bit longer.

Instead if could convert the white areas in the images to shapes and then use underlying filling capabilities of the OS. This may not be faster actually, but probably would use less memory and less code and might potentially scale better on a high resolution screen. It would also mean that the images must be stored differently (as collection of shapes instead).

It's a bit like rasterized images versus vector graphics.

• Just shows the coloring page
• No possibility to go back (unless one taps some corners or so)
• Chooses a new coloring page after a while, when one is finished

Hi, my name is Valeria. I'm a graphic designer and I'd like to collaborate on your open source project and propose free logo/icon design for your app. If it's something you're interested in, please, let me know!
Best,
Valeria

previously, this is nice project.
Can you add gradient color to coloring image?
Thank you.

Natural order in json file, but maybe choose different sort order (by stars, see #21 and #22, alphabetically, by last used, least used, ...)

Add license information.

Ideally one could save every picture and continue coloring later. Maybe there should be some support in the app to store and retrieve/continue work in progress.

I wonder how one could prepare/convert any image (colored, non-continuous lines) to something that could be a good coloring template.

A good coloring template is:

• Black and White only and the black lines separate a certain number (10-100) of not too small, compact regions

Possible ways to achieve that good be:

• Edge detection
• Mapping to color levels
• Local averaging (similar to stained glass)
• Artificial intelligence?

Some apps (mostly commercial apps) have these notifications that kind of remember you to use the app when you haven't used for a long time. This can be nice but it can also be annoying.

Is this an option for this app and if so how?

Legitimate uses I can imagine are:

• Work in progress is left unfinished for a certain time
• You haven't used the app for a certain time (but limit to at most one reminder)
• New content is available (after an update, new content should be substantial)

With Travis CI or someting similar?

Currently I think they have to be black and white. However, we could even have colored templates, if white just defines the areas where an image can be filled.

After the app is stable, usable and somewhat polished, put it out on google play, then follow it there.

What other prerequisites are needed?

See also: https://play.google.com/apps/publish/signup/

The about page shows a Html file and it should include an introduction, a short explanation, credits and a link to the github page. Create it.

• Animals
• Faces
• Mandalas
• Patterns
• ...

Translate the string contents and the description to other languages once, the app is ready to be published.

Languages I can get people to check: German, Spanish, Italian, Russian, Portuguese, Chinese, Japanese, Swedish.

And encode as easy - medium - difficult depending on number of areas.