以编程方式更改TextInputLayout强调颜色

问题描述

我有一个简单的TextInputLayout包含一个EditText视图。

I've got a simple TextInputLayout containing an EditText View.

现在我想知道如何改变口音颜色（下划线，hintTextColor时高亮）
我在TextInputLayout中找不到合适的方法。

Now I wonder how to change the accent color (underline, hintTextColor when highlighted) programmatically.I can't seem to find a suitable method inside TextInputLayout.

有任何建议吗？提前感谢。

Any suggestions? Thanks in advance.

推荐答案

IMHO InputTextLayout不能以编程方式更改标签颜色，因为它是按照样式设置的。我检查了InputTextLayout的源代码并编写了这个创建访问私有颜色成员的Hack帮助方法：

IMHO InputTextLayout can not change label color programmatically, because it is set by style. I examined source code of InputTextLayout and wrote this hack helper method which create access to private color member:

public static void setInputTextLayoutColor(EditText editText, @ColorInt int color) {
    TextInputLayout til = (TextInputLayout) editText.getParent();
    try {
        Field fDefaultTextColor = TextInputLayout.class.getDeclaredField("mDefaultTextColor");
        fDefaultTextColor.setAccessible(true);
        fDefaultTextColor.set(til, new ColorStateList(new int[][]{{0}}, new int[]{ color }));

        Field fFocusedTextColor = TextInputLayout.class.getDeclaredField("mFocusedTextColor");
        fFocusedTextColor.setAccessible(true);
        fFocusedTextColor.set(til, new ColorStateList(new int[][]{{0}}, new int[]{ color }));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

mFocusedTextColor用于设置内部CollapsingTextHelper.mCollapsedTextColor

mFocusedTextColor is used for set internal CollapsingTextHelper.mCollapsedTextColor which sets color of label.

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