问题描述
我有一个普通的 EditText 字段，我想以编程方式更改其下划线颜色.
I have an ordinary EditText field that I would like to programmatically change the underline color for.
<EditText
android:id="@+id/edit_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"/>
其他答案建议像这样更改背景颜色滤镜:
Other answers suggest changing the background color filter like so:
editText.getBackground().setColorFilter(color, PorterDuff.Mode.SRC_IN);
但是，运行该应用程序时我看不到任何变化.更改背景本身:
However, I don't see any change when I run the app. Changing the background itself:
editText.setBackground(color)
将整个 EditText 更改为 color -不是我想要的！
changes the entire EditText to color - not what I want!
如何以编程方式更改 EditText ， AppCompatEditText 或 TextInputEditText 的下划线颜色?我正在使用支持库的25.0.1版本.
How do I programmatically change the underline color for an EditText, AppCompatEditText or TextInputEditText? I am using version 25.0.1 of the Support Library.
推荐答案
您需要在 EditText backgroundTintList (或 supportBackgroundTintList )>到 ColorStateList 的实例，该实例仅包含您希望将色调更改为的颜色.一种向后兼容的简单方法如下:
You need to set the backgroundTintList (or supportBackgroundTintList) on the EditText to an instance of ColorStateList containing only the color you wish to change the tint to. An easy way to do this in a backwards-compatible way looks like this:
ColorStateList colorStateList = ColorStateList.valueOf(color);
editText.setSupportBackgroundTintList(colorStateList);
这将为 EditText 提供所需的下划线颜色.
This will give the EditText the desired underline color.
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