如何使用在values/colors.xml文件中定义的颜色更改TextView的背景颜色? [英] How to change a TextView's background color with a color defined in my values/colors.xml file?

问题描述

我正在使用Eclipse开发一个Android项目.我想使用我在res/values/colors.xml中定义的一种颜色来更改TextView的背景颜色.这些颜色都可以通过使用R.color.color_name来获得.

I am working on an Android project using Eclipse. I want to change the background color of a TextView using one of the colors I've defined in res/values/colors.xml. These colors are all available by using R.color.color_name.

我的问题是，这根本行不通.更改为我定义的颜色之一始终会使TextView的背景设置为其默认颜色，在这种情况下为黑色.如果我使用Java的内置颜色之一，则效果很好.我认为这是一个颜色定义问题，涉及到我实际上如何在XML中定义颜色的问题，但是我不确定.

My problem is that this simply won't work. Changing to one of my defined colors always leaves the TextView's background set to its default color, in this case, black. If I use one of Java's built-in colors, it works fine. I'm thinking it's a color definition problem, something involving how I actually define my colors in my XML, but I'm not sure.

// This works:
weight1.setBackgroundColor(Color.BLACK);

// This does not work:
weight2.setBackgroundColor(R.color.darkgrey);

// Color Definition: (this is in a separate xml file, not in my Java code)
<color name = "darkgrey">#A9A9A9</color>

推荐答案

它不起作用，因为您正在将背景颜色设置为键本身(这是一个十六进制值，如 0x7f050008 )而不是它的价值.要使用它的价值，请尝试:

It isn't working because you're setting the background color to the key itself (which is an hexadecimal value like 0x7f050008) instead of its value. To use it's value, try:

weight2.setBackgroundColor(getResources().getColor(R.color.darkgrey));

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