如何以编程方式获取颜色属性的值 [英] How to get a value of color attribute programmatically

问题描述

当我使用resolveAttribute()找出?attr/colorControlNormal的颜色值时，我得到了236:

When I use resolveAttribute() to find out a color value of ?attr/colorControlNormal, I got 236:

TypedValue typedValue = new TypedValue();
getTheme().resolveAttribute(R.attr.colorControlNormal, typedValue, true);
int color = typedValue.data;
// 236 

---

但是当我将XML布局与以下TextView元素一起使用时:

---

But when I use an XML layout with the following TextView element:

<TextView
  android:id="@+id/textView"
  style="?android:attr/textAppearance"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:textColor="?attr/colorControlNormal"
  android:text="@null" />

...以及以下Java代码:

...and the following Java code:

View textView = findViewById(R.id.textView);
int color = ((TextView) textView).getCurrentTextColor();
// -1979711488

我的颜色值为-1979711488

为什么这些结果有所不同?我希望获得相同的颜色值，但事实并非如此.

Why those results vary? I expected to get same color values, but they are not.

第二种方法(我相信)返回正确的颜色值.为什么我的第一种方法是错误的?

The second approach (I believe) returns a correct color value. Why is my first approach wrong?

我希望获得?attr/colorControlNormal的颜色值，而无需使用实际元素.我该怎么办?

I would prefer to obtain the color value of ?attr/colorControlNormal without a need of using actual element. How can I do that?

推荐答案

我相信可以代替:

    TypedValue typedValue = new TypedValue();
    getTheme().resolveAttribute(R.attr.colorControlNormal, typedValue, true);
    int color = typedValue.data;

您应该这样做:

    TypedValue typedValue = new TypedValue();
    getTheme().resolveAttribute(R.attr.colorControlNormal, typedValue, true);
    int color = ContextCompat.getColor(this, typedValue.resourceId)

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