我不知道如何使TextView上的特定文本变成粗体。
是这样的
txtResult.setText(id+" "+name);
我希望输出是这样的:
1111年尼尔
id和名称是我从数据库中检索值的变量,我想将id改为粗体,但只有id,所以名称不会受到影响,我不知道如何做到这一点。
我不知道如何使TextView上的特定文本变成粗体。
是这样的
txtResult.setText(id+" "+name);
我希望输出是这样的:
1111年尼尔
id和名称是我从数据库中检索值的变量,我想将id改为粗体,但只有id,所以名称不会受到影响,我不知道如何做到这一点。
当前回答
我创建了一个静态方法来设置文本粗体的TextView和EditText部分
public static void boldPartOfText(View mView, String contentData, int startIndex, int endIndex){
if(!contentData.isEmpty() && contentData.length() > endIndex) {
final SpannableStringBuilder sb = new SpannableStringBuilder(contentData);
final StyleSpan bss = new StyleSpan(Typeface.BOLD); // Span to make text bold
final StyleSpan iss = new StyleSpan(Typeface.NORMAL); //Span to make text normal
sb.setSpan(iss, 0, startIndex, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
sb.setSpan(bss, startIndex, endIndex, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // make first 4 characters Bold
sb.setSpan(iss,endIndex, contentData.length()-1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
if(mView instanceof TextView)
((TextView) mView).setText(sb);
else if(mView instanceof EditText)
((EditText) mView).setText(sb);
}
}
另一个更定制的代码
/*typeFaceStyle can be passed as
Typeface.NORMAL = 0;
Typeface.BOLD = 1;
Typeface.ITALIC = 2;
Typeface.BOLD_ITALIC = 3;*/
public static void boldPartOfText(View mView, String contentData, int startIndex, int endIndex,int typeFaceStyle){
if(!contentData.isEmpty() && contentData.length() > endIndex) {
final SpannableStringBuilder sb = new SpannableStringBuilder(contentData);
final StyleSpan bss = new StyleSpan(typeFaceStyle); // Span to make text bold
final StyleSpan iss = new StyleSpan(Typeface.NORMAL); //Span to make text italic
sb.setSpan(iss, 0, startIndex, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
sb.setSpan(bss, startIndex, endIndex, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // make first 4 characters Bold
sb.setSpan(iss,endIndex,contentData.length()-1,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
if(mView instanceof TextView)
((TextView) mView).setText(sb);
else if(mView instanceof EditText)
((EditText) mView).setText(sb);
}
}
其他回答
以防有人使用数据绑定。我们可以像这样定义绑定适配器
@BindingAdapter("html")
fun setHtml(view: TextView, html: String) {
view.setText(HtmlCompat.fromHtml(html, HtmlCompat.FROM_HTML_MODE_LEGACY))
}
然后我们可以在TextView上使用它
app:html="@{@string/bold_text}"
bold_text在哪里
<string name="bold_text"><![CDATA[Part of text is <b>bold</b>]]></string>
这是我的完整的解决方案,动态字符串值与大小写检查。
/**
* Makes a portion of String formatted in BOLD.
*
* @param completeString String from which a portion needs to be extracted and formatted.<br> eg. I am BOLD.
* @param targetStringToFormat Target String value to format. <br>eg. BOLD
* @param matchCase Match by target character case or not. If true, BOLD != bold
* @return A string with a portion formatted in BOLD. <br> I am <b>BOLD</b>.
*/
public static SpannableStringBuilder formatAStringPortionInBold(String completeString, String targetStringToFormat, boolean matchCase) {
//Null complete string return empty
if (TextUtils.isEmpty(completeString)) {
return new SpannableStringBuilder("");
}
SpannableStringBuilder str = new SpannableStringBuilder(completeString);
int start_index = 0;
//if matchCase is true, match exact string
if (matchCase) {
if (TextUtils.isEmpty(targetStringToFormat) || !completeString.contains(targetStringToFormat)) {
return str;
}
start_index = str.toString().indexOf(targetStringToFormat);
} else {
//else find in lower cases
if (TextUtils.isEmpty(targetStringToFormat) || !completeString.toLowerCase().contains(targetStringToFormat.toLowerCase())) {
return str;
}
start_index = str.toString().toLowerCase().indexOf(targetStringToFormat.toLowerCase());
}
int end_index = start_index + targetStringToFormat.length();
str.setSpan(new StyleSpan(BOLD), start_index, end_index, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
return str;
}
如。completeString = "I am BOLD"
情况下,我 if *targetStringToFormat* = "bold" and *matchCase* = true
返回“I am BOLD”(因为BOLD != BOLD)
案例二世 if *targetStringToFormat* = "bold" and *matchCase* = false
返回“I am BOLD”
应用:
myTextView.setText(formatAStringPortionInBold("I am BOLD", "bold", false))
希望有帮助!
找到了一种方法,如果你想处理多种语言的本地化,这很无聊,但它是有效的,让我们假设我们想要这样:
英文:
没有付款记录
西班牙语:
没有付款记录
你必须创建3个字符串
中文:
<string name="start_string">There are no</string>
<string name="middle_string">payments</string>
<string name="end_string">registered.</string>
<string name="string_format" translatable="false">%1$s %2$s %3$s</string>
西班牙语:
<string name="start_string">No hay</string>
<string name="middle_string">pagos</string>
<string name="end_string">registrados</string>
现在你可以这样做:
val startSpanPosition = getString(R.string.start_string).length
val endSpanPosition = startSpanPosition + getString(R.string.middle_string).length
val mySpannableString = SpannableStringBuilder(String.format(getString(R.string.string_format),
getString(R.string.start_string), getString(R.string.middle_string))), getString(R.string.end_string)))
mySpannableString.setSpan(StyleSpan(Typeface.BOLD), spanStartPosition, endSpanPosition, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
这里有一个更好的解决方案,如果你想使多个文本粗体。我改进了Eitan的代码。谢谢你搞清楚。
public static SpannableStringBuilder makeSectionOfTextBold(String text, String... textToBold) {
SpannableStringBuilder builder = new SpannableStringBuilder(text);
for (String textItem :
textToBold) {
if (textItem.length() > 0 && !textItem.trim().equals("")) {
//for counting start/end indexes
String testText = text.toLowerCase(Locale.US);
String testTextToBold = textItem.toLowerCase(Locale.US);
int startingIndex = testText.indexOf(testTextToBold);
int endingIndex = startingIndex + testTextToBold.length();
if (startingIndex >= 0 && endingIndex >= 0) {
builder.setSpan(new StyleSpan(Typeface.BOLD), startingIndex, endingIndex, 0);
}
}
}
return builder;
}
wtsang02答案是最好的方法,因为,Html.fromHtml("")现在已弃用。这里我要稍微加强一下,以方便那些在动态地将第一个单词加粗方面有问题的人,不管句子的大小。
首先让我们创建一个方法来获取第一个单词:
private String getFirstWord(String input){
for(int i = 0; i < input.length(); i++){
if(input.charAt(i) == ' '){
return input.substring(0, i);
}
}
return input;
}
现在假设你有一个像这样的长字符串:
String sentence = "friendsAwesomeName@gmail.com want's to be your friend!"
你希望你的句子是yourAwesomeName@gmail.com想成为你的朋友! 你所要做的就是-获取firstWord并获取它的长度以使firstWord加粗,就像这样:
String myFirstWord = getFirstWord(sentence);
int start = 0; // bold will start at index 0
int end = myFirstWord.length(); // and will finish at whatever the length of your first word
现在按照wtsang02的步骤来做,就像这样:
SpannableStringBuilder fancySentence = new SpannableStringBuilder(sentence);
fancySentence.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(fancySentence);
就是这样!现在你应该可以在长句或短句中加粗任意大小的单词了。