如何在java/安卓中更改字符串中特定字符的颜色？

Question

我有一根绳子

String text= //Some String That I know
String textToBeColored = //Some Letter User enters at run time

如何更改用户在运行时在字符串中输入的特定字母的颜色

Answer 1

你可以用简单的方法来做这件事

SpannableStringBuilder builder = new SpannableStringBuilder();

String red = "user's word is red";
SpannableString redSpannable= new SpannableString(red);
redSpannable.setSpan(new ForegroundColorSpan(Color.RED), 0, red.length(), 0);
builder.append(redSpannable);

mTextView.setText(builder, BufferType.SPANNABLE);

如果有任何问题，请告诉我

Answer 2

您可以通过在SpannableStringBuilder（文本）上设置span来完成此操作

final SpannableStringBuilder sb = new SpannableStringBuilder("text");
final ForegroundColorSpan fcs = new ForegroundColorSpan(Color.rgb(234, 123, 121));  


sb.setSpan(fcs, 0, 4, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
//0 is starting index
//4 is ending index

You can use sb as string 

Answer 3

我假设您希望在字符串中突出显示用户选择的特定文本之类的内容。下面应该可以帮助你做到这一点

String text = "abcada";
String textToBeColored = "a";

String htmlText = text.replace(textToBeColored,"<font color='#c5c5c5'>"+textToBeColored +"</font>");
// Only letter a would be displayed in a different color.
txtView.setText(Html.fromHtml(htmlText);

Answer 4

TextView TV = (TextView)findViewById(R.id.textView1); 
    Spannable WordtoSpan = new SpannableString("I this is just a test case");        
    WordtoSpan.setSpan(new ForegroundColorSpan(Color.RED), 4, 10, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    TV.setText(WordtoSpan);

试试这个