以编程方式将文本颜色设置为主要的android textview

Question

如何TextView以?android:textColorPrimary编程方式设置my的文本颜色？

我已经尝试了下面的代码,但它为textColorPrimary和textColorPrimaryInverse设置文本颜色始终为白色(两者都不是白色,我已通过XML检查).

TypedValue typedValue = new TypedValue();
Resources.Theme theme = getActivity().getTheme();
theme.resolveAttribute(android.R.attr.textColorPrimaryInverse, typedValue, true);
int primaryColor = typedValue.data;

mTextView.setTextColor(primaryColor);

Answer 1

最后,我使用以下代码来获取主题的主要文本颜色 -

// Get the primary text color of the theme
TypedValue typedValue = new TypedValue();
Resources.Theme theme = getActivity().getTheme();
theme.resolveAttribute(android.R.attr.textColorPrimary, typedValue, true);
TypedArray arr =
        getActivity().obtainStyledAttributes(typedValue.data, new int[]{
                android.R.attr.textColorPrimary});
int primaryColor = arr.getColor(0, -1);

Answer 2

kotlin 中的扩展版本

@ColorInt
fun Context.getColorResCompat(@AttrRes id: Int): Int {
    val resolvedAttr = TypedValue()
    this.theme.resolveAttribute(id, resolvedAttr, true)
    val colorRes = resolvedAttr.run { if (resourceId != 0) resourceId else data }
    return ContextCompat.getColor(this, colorRes)
}

用法：

textView.setTextColor(mActivity.getColorResCompat(android.R.attr.textColorPrimary))

Answer 3

您需要检查属性是否已解析为资源或颜色值.

textColorPrimary的默认值不是Color,而是ColorStateList,它是一种资源.

@ColorInt public static int resolveColorAttr(Context context, @AttrRes int colorAttr) {
  TypedValue resolvedAttr = resolveThemeAttr(context, colorAttr);
  // resourceId is used if it's a ColorStateList, and data if it's a color reference or a hex color
  int colorRes = resolvedAttr.resourceId != 0 ? resolvedAttr.resourceId : resolvedAttr.data;
  return ContextCompat.getColor(context, colorRes);
}

public static TypedValue resolveThemeAttr(Context context, @AttrRes int attrRes) {
  Theme theme = context.getTheme();
  TypedValue typedValue = new TypedValue();
  theme.resolveAttribute(attrRes, typedValue, true);
  return typedValue;
}

用法:

@ColorInt int color = resolveColorAttr(context, android.R.attr.textColorPrimaryInverse);