解决方法
这是我的工作代码,您可以用它来突出显示字符串的某些部分：
private void highlightTextPart(TextView textView,int index,String regularExpression) {
String fullText = textView.getText().toString();
int startPos = 0;
int endPos = fullText.length();
String[] textParts = fullText.split(regularExpression);
if (index < 0 || index > textParts.length - 1) {
return;
}
if (textParts.length > 1) {
startPos = fullText.indexOf(textParts[index]);
endPos = fullText.indexOf(regularExpression,startPos);
if (endPos == -1) {
endPos = fullText.length();
}
}
Spannable spannable = new SpannableString(fullText);
ColorStateList blueColor = new ColorStateList(new int[][] { new int[] {}},new int[] { Color.BLUE });
TextAppearanceSpan textAppearanceSpan = new TextAppearanceSpan(null,Typeface.BOLD_ITALIC,-1,blueColor,null);
BackgroundColorSpan backgroundColorSpan = new BackgroundColorSpan(Color.GREEN);
spannable.setSpan(textAppearanceSpan,startPos,endPos,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(backgroundColorSpan,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannable);
}
然后在您的活动中,调用如下：
int index = 3;
String regularExpression = " ";
String text = "Hello StackOverflow From BNK!";
TextView textView = (TextView) findViewById(R.id.textView);
if (textView != null) {
textView.setText(text);
highlightTextPart(textView,index,regularExpression);
}
