以編程方式將文本顏色設置為主要的 android textview

Question

如何以編程方式將TextView的文本顏色設置為?android:textColorPrimary ？

我已經嘗試了下面的代碼，但它將 textColorPrimary 和 textColorPrimaryInverse 的文本顏色始終設置為白色（它們都不是白色，我已經通過 XML 進行了檢查）。

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

最后我使用以下代碼來獲取主題的主要文本顏色 -

// 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

您需要檢查屬性是否已解析為資源或顏色值。

textColorPrimary的默認值不是Color而是ColorStateList ，它是一種資源。

Kotlin 解決方案

@ColorInt
fun Context.resolveColorAttr(@AttrRes colorAttr: Int): Int {
    val resolvedAttr = resolveThemeAttr(colorAttr)
    // resourceId is used if it's a ColorStateList, and data if it's a color reference or a hex color
    val colorRes = if (resolvedAttr.resourceId != 0) resolvedAttr.resourceId else resolvedAttr.data
    return ContextCompat.getColor(this, colorRes)
}

fun Context.resolveThemeAttr(@AttrRes attrRes: Int): TypedValue {
    val typedValue = TypedValue()
    theme.resolveAttribute(attrRes, typedValue, true)
    return typedValue
}

用法

@ColorInt val color = context.resolveColorAttr(android.R.attr.textColorPrimaryInverse)

Answer 3

kotlin 中的擴展版本

@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 4

這是 另一個回復的 kotlin 版本。 我只是添加它以防有人需要它。 對我來說效果很好。

fun resolveThemeAttr(context: Context, @AttrRes attrRes: Int): TypedValue {
    val theme = context.theme
    val typedValue = TypedValue()
    theme.resolveAttribute(attrRes, typedValue, true)
    return typedValue
}
@ColorInt
fun resolveColorAttr(context: Context, @AttrRes colorAttr: Int): Int {
    val resolvedAttr = resolveThemeAttr(context, colorAttr)
    // resourceId is used if it's a ColorStateList, and data if it's a color reference or a hex color
    val colorRes = if (resolvedAttr.resourceId != 0)
            resolvedAttr.resourceId
        else
            resolvedAttr.data
    return ContextCompat.getColor(context, colorRes)
}

用：

@ColorInt val color = resolveColorAttr(view.context,
    android.R.attr.textColorPrimary)

Answer 5

這是我的解決方案：

@ColorInt
fun Context.getColorCompat(@ColorRes colorRes: Int) =  ContextCompat.getColor(this, colorRes)
@ColorInt
fun Fragment.getColorCompat(@ColorRes colorRes: Int) = activity!!.getColorCompat(colorRes)

@ColorInt
fun Activity.getColorCompatFromAttr(@AttrRes colorAttrRes: Int) = getColorCompat(getResIdFromAttribute(this, colorAttrRes))
@ColorInt
fun Fragment.getColorCompatFromAttr(@AttrRes colorAttrRes: Int) = activity!!.getColorCompatFromAttr(colorAttrRes)

getResIdFromAttribute

    @JvmStatic
    fun getResIdFromAttribute(activity: Activity, @AttrRes attr: Int): Int {
        if (attr == 0)
            return 0
        val typedValue = TypedValue()
        activity.theme.resolveAttribute(attr, typedValue, true)
        val resourceId = typedValue.resourceId
        return if (resourceId != 0)
            resourceId
        else typedValue.data
    }