Question

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？

Answer 1

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。

Answer 2

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。

Answer 3

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);

Answer 4

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);

}

将整个TextView文字存储在StringBuilder。
将搜索到的字符串存储在StringBuilder。
将TextView

SpannableString

进行简单的操作，找到String文本中的所有TextView个实例，并在到达时更改它们。
将TextView的文字值设置为SpannableString。

Answer 5

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));

Answer 6

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))
    }

Answer 7

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);
}

Answer 8

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);

Answer 9

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
        )
    }
}

在TextView中更改一个单词的文本颜色

9 个答案: