如何将颜色过滤器应用于所有孩子的视图 [英] How to apply a color filter to a view with all children

问题描述

如何使包含许多不同项目的视图统一变灰 - ImageViews、TextViews、背景图像.我是否必须单独将每件事变灰?或者有没有办法对所有人应用相同的颜色过滤器?

How do I grey out a view uniformly which contains many different items - ImageViews, TextViews, background image. Do I have to grey out each thing individually? Or is there a way to apply the same color filter to all?

推荐答案

除非其他人有更好的答案，否则我目前的方法是将每个项目单独灰显.

Unless somebody else has a better answer, my current method is greying out each item separatedly.

PorterDuffColorFilter greyFilter = new PorterDuffColorFilter(Color.GRAY, PorterDuff.Mode.MULTIPLY);
myLayout.getBackground().setColorFilter(greyFilter);
myImageView.setColorFilter(greyFilter);
myTextView.setTextColor(0xff777777);

对于更多或嵌套的孩子，可能适合使用 instanceof 的循环，但我不需要它.

For more or nested children probably a loop with instanceof would be suitable but I don't need it.

这个过滤器实际上不是灰色的，更好的过滤器在这里:Drawable =>灰度可以以同样的方式使用.

This filter isn't actually grey, a better filter is here: Drawable => grayscale Which can be used in the same way.

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