Android中的strings.xml字符串中的粗体字

Question

我在strings.xml的一个字符串中有一个长文本.我想大胆并改变该文本中某些单词的颜色.

我该怎么做？

Answer 1

您基本上可以在字符串资源中使用html标记,如:

<resource>
    <string name="styled_welcome_message">We are <b><i>so</i></b> glad to see you.</string>
</resources>

并使用Html.fromHtml或使用spannable,检查我发布的链接.

旧的类似问题:TextView中是否可以有多个样式？

Answer 2

在字符串资源中使用html标签: -

<resources>
<string name="string_resource_name"><![CDATA[<b> Your text </b>]]> </string>
</resources>

并从字符串资源获取粗体文本,如: -

private Spanned getSpannedText(String text) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            return Html.fromHtml(text, Html.FROM_HTML_MODE_COMPACT);
        } else {
            return Html.fromHtml(text);
        }
    }


 String s = format(context.getResources().getString(R.string.string_resource_name));
 textView.setText(getSpannedText(s));

Answer 3

正如David Olsson所说,您可以在字符串资源中使用HTML:

<resource>
    <string name="my_string">A string with <i>actual</i> <b>formatting</b>!</string>
</resources>

然后,如果你使用getText(R.string.my_string)而不是getString(R.string.my_string)你得到一个CharSequence而不是一个String包含格式嵌入.

Answer 4

在 kotlin 中，您可以在资源（活动|片段|上下文）上创建扩展函数，将您的字符串转换为 html span

例如

fun Resources.getHtmlSpannedString(@StringRes id: Int): Spanned = getString(id).toHtmlSpan()

fun Resources.getHtmlSpannedString(@StringRes id: Int, vararg formatArgs: Any): Spanned = getString(id, *formatArgs).toHtmlSpan()

fun Resources.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int): Spanned = getQuantityString(id, quantity).toHtmlSpan()

fun Resources.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int, vararg formatArgs: Any): Spanned = getQuantityString(id, quantity, *formatArgs).toHtmlSpan()

fun String.toHtmlSpan(): Spanned = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    Html.fromHtml(this, Html.FROM_HTML_MODE_LEGACY)
} else {
    Html.fromHtml(this)
}

用法

//your strings.xml
<string name="greeting"><![CDATA[<b>Hello %s!</b><br>]]>This is newline</string>

//in your fragment or activity
resources.getHtmlSpannedString(R.string.greeting, "World")

编辑更多扩展

fun Context.getHtmlSpannedString(@StringRes id: Int): Spanned = getString(id).toHtmlSpan()

fun Context.getHtmlSpannedString(@StringRes id: Int, vararg formatArgs: Any): Spanned = getString(id, *formatArgs).toHtmlSpan()

fun Context.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int): Spanned = resources.getQuantityString(id, quantity).toHtmlSpan()

fun Context.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int, vararg formatArgs: Any): Spanned = resources.getQuantityString(id, quantity, *formatArgs).toHtmlSpan()


fun Activity.getHtmlSpannedString(@StringRes id: Int): Spanned = getString(id).toHtmlSpan()

fun Activity.getHtmlSpannedString(@StringRes id: Int, vararg formatArgs: Any): Spanned = getString(id, *formatArgs).toHtmlSpan()

fun Activity.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int): Spanned = resources.getQuantityString(id, quantity).toHtmlSpan()

fun Activity.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int, vararg formatArgs: Any): Spanned = resources.getQuantityString(id, quantity, *formatArgs).toHtmlSpan()


fun Fragment.getHtmlSpannedString(@StringRes id: Int): Spanned = getString(id).toHtmlSpan()

fun Fragment.getHtmlSpannedString(@StringRes id: Int, vararg formatArgs: Any): Spanned = getString(id, *formatArgs).toHtmlSpan()

fun Fragment.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int): Spanned = resources.getQuantityString(id, quantity).toHtmlSpan()

fun Fragment.getQuantityHtmlSpannedString(@PluralsRes id: Int, quantity: Int, vararg formatArgs: Any): Spanned = resources.getQuantityString(id, quantity, *formatArgs).toHtmlSpan()

Answer 5

来自 Android 官方网站的简单且最新的答案（使用%s或%1$s等占位符）：来源

首先，您将像这样添加字符串strings.xml：

<string name="welcome">Welcome to <b>Android</b> %1$s, %2$s!</string>

在这里，您将把<b 之前的 b 替换为<

要像这样：

<string name="welcome">Welcome to &lt;b>Android&lt;/b> %1$s, %2$s!</string>

在 kotlin 代码中，您将进行扩展以从 html 解析字符串：

fun String.fromHtml(): Spanned {
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    // FROM_HTML_MODE_LEGACY is the behaviour that was used for versions below android N
    // we are using this flag to give a consistent behaviour
    Html.fromHtml(this, Html.FROM_HTML_MODE_LEGACY)
} else {
    Html.fromHtml(this)
 }
}

然后像这样使用它：

val escapedString: String = TextUtils.htmlEncode("programmers & friends")
val textView : TextView = findViewById(R.id.myTextView)
textView.text = getString(R.string.welcome, "Studio", escapedString).fromHtml()

输出：欢迎来到Android Studio，程序员和朋友们！

Answer 6

字符串.xml

<string name="my_text"><Data><![CDATA[<b>Your text</b>]]></Data></string>

设置

textView.setText(Html.fromHtml(getString(R.string.activity_completed_text)));