将十六进制颜色值(# ffffff)转换为整数值

我正在从一个服务器接收十六进制颜色值(在这种形式下，#xxxxxx，例如黑色的 #000000)

如何将其转换为整数值？

我试着做 Integer.valueOf("0x" + passedColor.substring(1, passedColor.length()))来得到一个更好的 0x000000结果，但是这里没有解释为 int，还有其他的建议吗？

我收到一个错误: 08-03 21:06:24.673: ERROR/AndroidRuntime(20231): java.lang.NumberFormatException: unable to parse '0x00C8FBFE' as integer

我使用的是 Android SDK 的 setBackgroundColor(int color)函数，它采用一个整数颜色值——正如您可能已经猜到的那样。

这是这个问题的反面: 在 Android 中如何将一个颜色整数转换为十六进制字符串？

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Integer.parseInt(myString.replaceFirst("#", ""), 16)
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I have the same problem that I found some color in form of #AAAAAA and I want to conver that into a form that android could make use of. I found that you can just use 0xFFAAAAAA so that android could automatically tell the color. Notice the first FF is telling alpha value. Hope it helps

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最佳答案

The real answer is to use:

Color.parseColor(myPassedColor) in Android, myPassedColor being the hex value like #000 or #000000 or #00000000.

However, this function does not support shorthand hex values such as #000.

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I was facing the same problem. This way I was able to solved it. As CQM said, using Color.parseColor() is a good solution to this issue.

Here is the code I used:

this.Button_C.setTextColor(Color.parseColor(prefs.getString("color_prefs", String.valueOf(R.color.green))));

In this case my target was to change the Button's text color (Button_C) when I change the color selection from my Preferences (color_prefs).

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The real answer is this simplest and easiest ....

String white = "#ffffff";
int whiteInt = Color.parseColor(white);
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Try this, create drawable in your resource...

<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="@color/white"/>
<size android:height="20dp"
android:width="20dp"/>
</shape>

then use...

 Drawable mDrawable = getActivity().getResources().getDrawable(R.drawable.bg_rectangle_multicolor);
mDrawable.setColorFilter(Color.parseColor(color), PorterDuff.Mode.SRC_IN);
mView1.setBackground(mDrawable);

with color... "#FFFFFF"

if the color is transparent use... setAlpha

mView1.setAlpha(x); with x float 0-1 Ej (0.9f)

Good Luck

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Answer is really simple guys, in android if you want to convert hex color in to int, just use android Color class, example shown as below

this is for light gray color

Color.parseColor("#a8a8a8");

Thats it and you will get your result.

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Based on CQM's answer and on ovokerie-ogbeta's answer to another question I've come up with this solution: 

if (colorAsString.length() == 4) { // #XXX
colorAsString = colorAsString.replaceAll("#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])", "#$1$1$2$2$3$3");
}


int color = Color.parseColor(colorAsString);
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Get Shared Preferences Color Code in String then Convert to integer and add layout-background color:

    sharedPreferences = getSharedPreferences(mypref, Context.MODE_PRIVATE);
String sw=sharedPreferences.getString(name, "");
relativeLayout.setBackgroundColor(Color.parseColor(sw));
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if you can pass the values as static const, you can convert the hex value to an Android (android.graphics.Color) using this online converter and put the color reference in the const, ie: color converter give me this value for this color #EE5670 = 0xFFEE5670.

static const Color redColor = const Color(0xFFEE5670);

https://convertingcolors.com/hex-color-EE5670.html?search=#EE5670


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