我认为你不能。但是你可以根据自己的喜好“格式化”字符串:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="button_text">Add item</string>
    <string name="message_text">You don't have any items yet! Add one by pressing the %1$s button.</string>
</resources>

在代码中:

Resources res = getResources();
String text = String.format(res.getString(R.string.message_text),
                            res.getString(R.string.button_text));

除了以上Francesco Laurita的回答https://stackoverflow.com/a/39870268/9400836

似乎有一个编译错误“&entity被引用，但未声明”，可以通过引用外部声明来解决，就像这样

res - raw entities耳鼻喉科。

<!ENTITY appname "My App Name">

res /价值/ strings.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE resources [
    <!ENTITY appname SYSTEM "/raw/entities.ent">
]>
<resources>
    <string name="app_name">&appname;</string>
</resources

虽然它编译和运行，但它有一个空值。也许有人知道怎么解决。我会发表评论，但最低声誉是50。

在xml中插入一个经常使用的字符串(例如应用程序名称)而不使用Java代码的好方法: 源

    <?xml version="1.0" encoding="utf-8"?>
    <!DOCTYPE resources [
      <!ENTITY appname "MyAppName">
      <!ENTITY author "MrGreen">
    ]>

<resources>
    <string name="app_name">&appname;</string>
    <string name="description">The &appname; app was created by &author;</string>
</resources>

更新:

你甚至可以定义你的实体全局，例如:

res /生/ entities.ent:

<!ENTITY appname "MyAppName">
<!ENTITY author "MrGreen">

res /价值/ string.xml:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE resources [
    <!ENTITY % ents SYSTEM "./res/raw/entities.ent">
    %ents;   
]>

<resources>
    <string name="app_name">&appname;</string>
    <string name="description">The &appname; app was created by &author;</string>
</resources>

我已经创建了一个小库，允许您在构建时解析这些占位符，因此您不必添加任何Java/Kotlin代码来实现您想要的结果。

基于你的例子，你必须像这样设置你的字符串:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="button_text">Add item</string>
    <string name="message_text">You don't have any items yet! Add one by pressing the ${button_text} button.</string>
</resources>

然后插件将负责生成以下内容:

<!-- Auto generated during compilation -->
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="message_text">You don't have any items yet! Add one by pressing the Add item button.</string>
</resources>

它也适用于本地化和风味字符串，生成的字符串将保持自己更新，每当你改变你的模板或它的值。

更多信息请访问:https://github.com/LikeTheSalad/android-stem

您可以使用字符串占位符(%s)，并在运行时使用java替换它们

<resources>
<string name="button_text">Add item</string>
<string name="message_text">Custom text %s </string>
</resources>

在Java中

String final = String.format(getString(R.string.message_text),getString(R.string.button_text));

然后将它设置到它使用字符串的地方

我认为你不能。但是你可以根据自己的喜好“格式化”字符串:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="button_text">Add item</string>
    <string name="message_text">You don't have any items yet! Add one by pressing the %1$s button.</string>
</resources>

在代码中:

Resources res = getResources();
String text = String.format(res.getString(R.string.message_text),
                            res.getString(R.string.button_text));