如何在Android中为Button文本加下划线? [英] How to Underline Text of Button in Android?

问题描述

我有一个透明的按钮，带有图标和文本.

I have a button which is transparent and has an icon and text.

我想在按钮的文本下划线，但我无法执行此操作.

I want to underline the text of the button but i have not been able to do this.

下面是我的xml代码:

Below is my xml code:

<Button
     android:id="@+id/parkButton"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:drawableStart="@drawable/park"
     android:text="@string/button_name"
     android:background="@android:color/transparent"
     android:textColor="@android:color/black"/>

字符串文件具有:

<resources>
    <string name="button_name"><u>Parking Areas</u></string>
</resources>

此方法适用于TextView，但不适用于Button. 有什么建议吗?

This approach works in TextView, but not in Button. Any suggestion?

推荐答案

仅代码

Java:

Button button = (Button) findViewById(R.id.park);
button.setPaintFlags(button.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);

科特琳:

val button = findViewById<Button>(R.id.park);
button.paintFlags = button.paintFlags or Paint.UNDERLINE_TEXT_FLAG

带有静态文本的资源字符串(仅xml)

如果您的资源中包含静态文本，则还可以在strings.xml中使用以下方法:

If you have a static text in your resources you could also use the following approach in your strings.xml:

<string name="underlined_text"><u>I\'m underlined</u></string>

带有动态文本(XML +代码)的资源字符串

如果您使用动态文本，但不喜欢第一种方法(这也不是最好的恕我直言)，则还可以使用以下方法:

If you're using dynamic text but don't like the first approach (which isn't the best imho either), you could also use following:

strings.xml

strings.xml

<string name="underlined_dynamic_text"><u>%s</u></string>

Java:

button.setText(getString(R.string.underlined_dynamic_text, "I'm underlined");

科特琳:

button.text = getString(R.string.underlined_dynamic_text, "I'm underlined")

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