michaelevans / colorart

iTunes 11-style color matching code for Android

##About

ColorArt is a library that uses an image to create a themed image/text display. It's a port of the idea found on the Panic Blog to work on Android.

##Usage

(ColorArt is supported on Android 2.1+.)

Add ColorArt as a dependency to your build.gradle file:

compile 'org.michaelevans.colorart:library:0.0.3'

Then you can use the library like this:

// get a bitmap and analyze it
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.album);
ColorArt colorArt = new ColorArt(bitmap);

// get the colors
colorArt.getBackgroundColor()
colorArt.getPrimaryColor()
colorArt.getSecondaryColor()
colorArt.getDetailColor()

###FadingImageView

mFadingImageView.setBackgroundColor(colorArt.getBackgroundColor(), FadingImageView.FadeSide.LEFT);

This will set the fading edge on the left side, with that background color. You can also enable/disable the fade with:

mImageView.setFadeEnabled(true/false);

##Screenshots

##License

Copyright 2015 Michael Evans

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

colorart's Issues

Colors on Android 4.X.X and 5.X.X differs

Same code, same bitmaps, but if you're to open app on android up to 4.4 and android 5.0 and more, achieved colors would differs a lot.

add spaces between ### and titles

.. If you do so, your markdown starts to show up properly)
Cooooooool library! =)

Also, I'm interested, do you use some kind of random heuristics points or just scan the whole bitmap to calculate most dominant colors? (so that the algorithm complexity is O(n^2) ?)

Having problems getting correct colors.

It seems that the algorithm you're using has a tough time picking out reds. I'm using your library to pick out colors for albums and here is the first example of something going not as expected.

The background color is pretty good. It could be a little darker to reflect that the album background isn't pure white. My main issue is with the primary color here. There are pretty much only two colors on the album, white and red. The red doesn't show up in any of the colors, be it primary, secondary, or detail color. In all of these examples, the colors are as follows:

• Background color is from ColorArt.getBackgroundColor()
• Song title is ColorArt.getPrimaryColor()
• Artist is ColorArt.getSecondaryColor()
• The time played and time left textviews are ColorArt.getPrimaryColor()
• The progress bar on the seekbar is ColorArt.getSecondaryColor()
• The draggable thumb on the seekbar is ColorArt.getPrimaryColor()

Here's another example

The background color is a dark brown/green. Ideally it would be a red or a white as those are the two most dominant colors in the image and they also touch the borders.

Yet another example:

For this album cover, the background color is good. What's weird is that the primary color is pink. There isn't really pink on the album cover, though there is a bit of red in the reflection of the sunglasses. It would make more sense for the primary color to be a black, white or brown.

Moar example:

There should be red/magenta as the primary color.

Last example:

Nix the purple/lilac. Use the reds/oranges/light blues/blacks or whites. The background color should definitely be white here as that is also the background color of the album. Red or orange would work as well.

EDIT:

I found some more weird occurrences. In the following image, there shouldn't be any light blue.

In the following image, there should not be pink.

In the future, similar to Chris Banes's ColorFinder, it would be nice to have a secondary text color which is either black or white depending on the brightness of the background color to ensure high visibility/readability.

Error:(47, 0) Could not find property '' on DefaultExternalModuleDependency{group='org.michaelevans.colorart', name='library', version='0.0.2', configuration='default'}.

Any ideaa?

compile 'org.michaelevans.colorart:library:0.0.2'

Remove Apache commons collections dependency

It would be great to remove the dependency on the Apache commons collections, which is a fairly large library.

NullPointerException in findTextColors()

I could trigger an NPE in findTextColors(), line 164

            } else if (mSecondaryColor == null) {
NPE HERE  =>   if (!isDistinctColor(mPrimaryColor, currentColor) ||        
                        !isContrastingColor(currentColor, mBackgroundColor)) {
                    continue;

mPrimaryColor can be null, hence the NPE since isDistinctColor() expects an int as first parameter.

remove android:allowBackup

Manifest merger failed : Attribute application@allowBackup value=(false) from AndroidManifest.xml:28:9-36
is also present at [org.michaelevans.colorart:library:0.0.3] AndroidManifest.xml:12:9-35 value=(true).
Suggestion: add 'tools:replace="android:allowBackup"' to element at AndroidManifest.xml:23:5-58:19 to override.

Include examples of setting UI drawables from ColorArt colors

Hi,

Not so much a bug, more a doc feature request. It would be useful to include some examples of using ColorArt to set the color of other Android UI elements.

E.g., see nikclayton/android-squeezer@6ba7f1d (lines 1310 onwards) for an example of how to adjust the colors on a ProgressBar (track, and thumb) based on the colors determined by ColorArt.

Best, N

ColorArt mainActivity run directly

download ColorArt run mainActivity

ColorArt Application Sorry,ColorArt is stopping

Crashes when working with images that has transparent pixels

java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.ComparableTimSort.mergeLo(ComparableTimSort.java:710)
at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:447)
at java.util.ComparableTimSort.mergeCollapse(ComparableTimSort.java:372)
at java.util.ComparableTimSort.sort(ComparableTimSort.java:178)
at java.util.ComparableTimSort.sort(ComparableTimSort.java:142)
at java.util.Arrays.sort(Arrays.java:1973)
at java.util.Collections.sort(Collections.java:1867)
at org.michaelevans.colorart.library.ColorArt.findTextColors(ColorArt.java:154)
at org.michaelevans.colorart.library.ColorArt.analyzeImage(ColorArt.java:49)
at org.michaelevans.colorart.library.ColorArt.(ColorArt.java:44)