我正在寻找一种方法来改变TextView中Activity中单个单词的文字颜色。
例如，有了这个：
String first = "This word is ";
String next = "red"
TextView t = (TextView) findViewById(R.id.textbox);
t.setText(first + next);
如何将next文字的颜色更改为红色？
答案 0 :(得分：154)
我知道最简单的方法就是使用html。
String first = "This word is ";
String next = "<font color='#EE0000'>red</font>";
t.setText(Html.fromHtml(first + next));
但这会要求你在（如果？）想要改变颜色时重建TextView，这可能会造成麻烦。
答案 1 :(得分：70)
t.setText(first + next, BufferType.SPANNABLE);
Spannable s = (Spannable)t.getText();
int start = first.length();
int end = start + next.length();
s.setSpan(new ForegroundColorSpan(0xFFFF0000), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
你必须使用spannable这也可以让你增加一些文字的大小，使它变得粗体等....甚至放入一些图像。
答案 2 :(得分：26)
Use SpannableStringBuilder like this :
SpannableStringBuilder builder = new SpannableStringBuilder();
SpannableString str1= new SpannableString("Text1");
str1.setSpan(new ForegroundColorSpan(Color.RED), 0, str1.length(), 0);
builder.append(str1);
SpannableString str2= new SpannableString(appMode.toString());
str2.setSpan(new ForegroundColorSpan(Color.GREEN), 0, str2.length(), 0);
builder.append(str2);
TextView tv = (TextView) view.findViewById(android.R.id.text1);
tv.setText( builder, TextView.BufferType.SPANNABLE);
答案 3 :(得分：2)
如果要更改String文本中特定TextView的所有实例的状态（不区分大小写），可以使用StringBuilder和SpannableString之类的这样：
StringBuilder textBuilder = new StringBuilder(myTextView.getText().toString());
StringBuilder searchedTextBuilder = new StringBuilder((mySearchedString));
SpannableString spannableString = new SpannableString(myTextView.getText().toString());
int counter = 0;
int index = 0;
for (int i = 0;i < textBuilder.length() - mySearchedString.length() - 1;i++)
{
counter = 0;
if (Character.toLowerCase(textBuilder.charAt(i)) == Character.toLowerCase(searchedTextBuilder.charAt(index)))
{
counter++;
index++;
for (int j = 1,z = i + 1;j < mySearchedString.length() - 1;j++,z++)
{
if (Character.toLowerCase(textBuilder .charAt(z)) == Character.toLowerCase(searchedTextBuilder .charAt(index)))
{
counter++;
index++;
}
else
{
index++;
if (index % mySearchedString.length() == 0)
{
index = 0;
}
break;
}
}
if (counter == mySearchedString.length() - 1) // A match
{
spannableString.setSpan(new ForegroundColorSpan(Color.RED), i,
i + mySearchedString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); // Do the change you want(In this case changing the fore ground color to red)
index = 0;
continue;
}
else
{
index = 0;
continue;
}
}
}
myTextView.setText(spannableString);
}
TextView文字存储在StringBuilder。StringBuilder。TextView SpannableString文字存储起来
String文本中的所有TextView个实例，并在到达时更改它们。TextView的文字值设置为SpannableString。答案 4 :(得分：1)
对于长字符串，你可以使用它：
String help = getString(R.string.help);
help = help.replace("some word", "<font color='#EE0000'>some word</font>");
txtDesc.setText(Html.fromHtml(help));
答案 5 :(得分：1)
我在Kotlin中为自己的用例实现了一个实用程序功能，也许对其他人有用。
fun getCusomTextWithSpecificTextWithDiffColor(textToBold: String, fullText: String,
targetColor: Int) =
SpannableStringBuilder(fullText).apply {
setSpan(ForegroundColorSpan(targetColor),
fullText.indexOf(textToBold),
(fullText.indexOf(textToBold) + textToBold.length),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
}
我如何使用它：
context?.let {
infoMessage.text = AppUtils.getCusomTextWithSpecificTextWithDiffColor(
wordAsBold,
completeSentence, ContextCompat.getColor(it, R.color.white))
}
答案 6 :(得分：0)
使用情况：
makeTextBold("Your order is accepted","accepted", textView);
makeTextBold("Your order is canceled","canceled", textView);
功能
：public static void makeTextBold(String sentence, String word, AppCompatTextView textView) {
SpannableStringBuilder builder = new SpannableStringBuilder();
int startIndex = sentence.indexOf(word.toLowerCase().trim());
int endIndex = startIndex + word.toLowerCase().trim().length();
SpannableString spannableString = new SpannableString(sentence);
StyleSpan boldSpan = new StyleSpan(Typeface.BOLD);
spannableString.setSpan(boldSpan, startIndex, endIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //To make text Bold
spannableString.setSpan(new ForegroundColorSpan(Color.RED), startIndex, endIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //To change color of text
builder.append(spannableString);
textView.setText(builder, TextView.BufferType.SPANNABLE);
}
答案 7 :(得分：0)
我认为这更具可读性 用于为字符串中的单词着色 也许还可以提高一点效率，因为您只需编写一次
String str = YOUR_STRING
Spannable s = new SpannableString(str);
int start = str.indexOf(err_word_origin);
int end = start + err_word_origin.length();
s.setSpan(new ForegroundColorSpan(Color.BLUE), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
YOUR_TEXT_VIEW.setText(s , TextView.BufferType.SPANNABLE);
答案 8 :(得分：0)
我的解决方案扩展：
Row(
children: [
Expanded(
child: SizedBox(
height: 80,
child: category.categoryList != null ? category.categoryList.length > 0 ? ListView.builder(
itemCount: category.categoryList.length,
padding: EdgeInsets.only(left: Dimensions.PADDING_SIZE_SMALL),
physics: BouncingScrollPhysics(),
scrollDirection: Axis.horizontal,
itemBuilder: (context, index) {
return Padding(
padding: EdgeInsets.only(right: Dimensions.PADDING_SIZE_SMALL),
child: InkWell(
onTap: () => Navigator.pushNamed(context, Routes.getCategoryRoute(
category.categoryList[index].id, category.categoryList[index].image,
category.categoryList[index].name.replaceAll(' ', '-'),
)),
child: Column(children: [
ClipOval(
child: FadeInImage.assetNetwork(
placeholder: Images.placeholder_image,
image: Provider.of<SplashProvider>(context, listen: false).baseUrls != null
? '${Provider.of<SplashProvider>(context, listen: false).baseUrls.categoryImageUrl}/${category.categoryList[index].image}':'',
width: 65, height: 65, fit: BoxFit.cover,
),
),
Text(
category.categoryList[index].name,
style: rubikMedium.copyWith(fontSize: Dimensions.FONT_SIZE_SMALL),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
]),
),
);
},
) : Center(child: Text(getTranslated('no_category_avl', context))) : CategoryShimmer(),
),
),
ResponsiveHelper.isMobile(context)? SizedBox(): category.categoryList != null ? Column(
children: [
InkWell(
onTap: (){
showDialog(context: context, builder: (con) => Dialog(
child: Container(height: 550, width: 600, child: CategoryPopUp())
));
},
child: Padding(
padding: EdgeInsets.only(right: Dimensions.PADDING_SIZE_SMALL),
child: CircleAvatar(
radius: 35,
backgroundColor: Theme.of(context).primaryColor,
child: Text(getTranslated('view_all', context), style: TextStyle(fontSize: 14,color: Colors.white)),
),
),
),
SizedBox(height: 10,)
],
): CategoryAllShimmer()
],
),
用法
fun coloredText(
baseText: String,
coloredText: String,
targetColor: Int
): SpannableStringBuilder {
val transformText = "$baseText $coloredText"
return SpannableStringBuilder(transformText).apply {
setSpan(
ForegroundColorSpan(targetColor),
transformText.indexOf(coloredText),
(transformText.indexOf(coloredText) + coloredText.length),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
)
}
}