是否可以使textview
中的每个单词或每个字母都有不同的颜色?我尝试扩展textview
并创建它,但我遇到的问题是如何同时绘制所有文本并使用不同的颜色。
android.text.Spannable
。final SpannableStringBuilder str = new SpannableStringBuilder(text);
str.setSpan(
new ForegroundColorSpan(Color.BLUE),
wordStart,
wordEnd,
SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE
);
myTextView.setText(str);
编辑:将所有的“Java”变为绿色
final Pattern p = Pattern.compile("Java");
final Matcher matcher = p.matcher(text);
final SpannableStringBuilder spannable = new SpannableStringBuilder(text);
final ForegroundColorSpan span = new ForegroundColorSpan(Color.GREEN);
while (matcher.find()) {
spannable.setSpan(
span, matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
);
}
myTextView.setText(spannable);
SpannableString
类允许您通过应用CharacterStyle(例如ForegroundColorSpan
)的扩展来使用setSpan
方法轻松地格式化字符串的某些部分(跨度),使一个部分和另一个部分看起来不同。
您可以尝试这样做:
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
richTextView = (TextView)findViewById(R.id.rich_text);
// this is the text we'll be operating on
SpannableString text = new SpannableString("Lorem ipsum dolor sit amet");
// make "Lorem" (characters 0 to 5) red
text.setSpan(new ForegroundColorSpan(Color.RED), 0, 5, 0);
// make "ipsum" (characters 6 to 11) one and a half time bigger than the textbox
text.setSpan(new RelativeSizeSpan(1.5f), 6, 11, 0);
// make "dolor" (characters 12 to 17) display a toast message when touched
final Context context = this;
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(View view) {
Toast.makeText(context, "dolor", Toast.LENGTH_LONG).show();
}
};
text.setSpan(clickableSpan, 12, 17, 0);
// make "sit" (characters 18 to 21) struck through
text.setSpan(new StrikethroughSpan(), 18, 21, 0);
// make "amet" (characters 22 to 26) twice as big, green and a link to this site.
// it's important to set the color after the URLSpan or the standard
// link color will override it.
text.setSpan(new RelativeSizeSpan(2f), 22, 26, 0);
text.setSpan(new URLSpan("http://www.chrisumbel.com"), 22, 26, 0);
text.setSpan(new ForegroundColorSpan(Color.GREEN), 22, 26, 0);
// make our ClickableSpans and URLSpans work
richTextView.setMovementMethod(LinkMovementMethod.getInstance());
// shove our styled text into the TextView
richTextView.setText(text, BufferType.SPANNABLE);
}
结果将会像这样:
可以使用 Spannable 和 SpannableStringBuilder 实现此操作。有关示例,请参见 Spanned 和 Spannable 文本的示例。
要了解各种文本格式(背景颜色、前景颜色、可点击等),请参见 CharacterStyle。
Html.fromHtml()
。请参见https://dev59.com/V3I_5IYBdhLWcg3wFvDL。 - Xavi Gil