如何在 Kotlin for Android 上使用setTextColor(hexaValue)，

出身背景

在Java中，我可以使用TextView的标准十六进制值直接更改TextView的文本 colored颜色 :

    textView.setTextColor(0xffffffff); //white
    textView.setTextColor(0x00000000); //transparent
    textView.setTextColor(0xff000000); //black
    textView.setTextColor(0xff0000ff); //blue
    //etc...

Very easy...

问题

On Kotlin, if I try to write such a thing, I get with a weird build error:

Error:(15, 18) None of the following functions can be called with the arguments supplied: public open fun setTextColor(p0: ColorStateList!): Unit defined in android.widget.TextView public open fun setTextColor(p0: Int): Unit defined in android.widget.TextView

我试过的是

I tried to search about this over the Internet, and I couldn't see anything special about hexa-decimal values. Seems the same like on Java:

https://kotlinlang.org/docs/reference/basic-types.html个

Then I decided to just write in Java, and convert to Kotlin. The result is very unreadable in terms of the color value:

    textView.setTextColor(-0x1) //white
    textView.setTextColor(0x00000000) //transparent
    textView.setTextColor(-0x1000000) //black
    textView.setTextColor(-0xffff01) //blue

在我看来，用于Kotlin的整数的十六进制值似乎是有符号的，而在Java上它会自动转换为有符号的，因此这会导致值的翻转，并且需要在需要时设置负号.

我能想到的唯一一件事，仍然能让它读得很好的，就是这样的东西:

textView.setTextColor(Integer.parseUnsignedInt("ffff0000",16));

However, this has multiple disadvantages:

1. 时间要长得多.
2. It converts a String, so it's much less efficient
3. Most importantly: it works only from API 26 (Android O) , which currently is active on about 1% of Android devices worldwide.

The questions

为什么会这样？

What exactly can I do to make it the most readable, without string conversions, and work on all Android versions (minSdkVersion 14 in my case) ?