如何根据覆盖的ImageView的颜色更改文本的颜色? [英] How can I change the color of my text based on the color of the ImageView it overlays?
问题描述
因此,我在用户上传的 ImageView
上设置了带有白色文本标签的透明按钮.如果用户上传的图片大部分是白色的,则按钮很难看清,即使不是完全看不见.
有人知道获取 ImageView
的源图片/可绘制对象的平均颜色的方法吗?如果可以,可以将其与某个阈值进行比较,可以尝试...如果可以,可以将按钮上文本的颜色更改为该颜色的反色..或其他东西?
只是在这里随便吐痰.
当然,如果有人知道更好的方法,将不胜感激更多信息,谢谢!
您可以使用
So I've got transparant buttons with white text labels set up over a user uploaded ImageView
. If the user uploads an image that is mostly white, then the buttons are hard to see if not completely invisible.
Does anyone know of a way to get the average color of a ImageView
's source picture/drawable? If I can do this, I can compare it to a certain threshold I can trial and error for... If I can get this, then I can change the color of the text on my buttons to the inverted version of this color...or something??
Just idea spitting here..
And of course, if someone knows a better way, more info would be much appreciated, thanks!!
You could use the Palette class.
From the developers guide:
You can retrieve the prominent colors from the image using the getter methods in the
Palette
class, such asPalette.getVibrantColor()
.
Palette.from()
expects a Bitmap
param, so you'll have to get it from your ImageView
.
Something like this should work:
Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
Palette colorPalette = Palette.from(bitmap).generate();
And then you can call the appropriate methods on this Palette
instance to get the prominent colors, for example:
int darkVibrantColor = colorPalette.getDarkVibrantColor(someDefaultColor);
Check out this example screenshot on how the Palette
class recognizes colors:
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