How to use

length

method

in

android.text.SpannableStringBuilder

private static void setSpan(SpannableStringBuilder builder, Object what) {
  builder.setSpan(what, 0, builder.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}

private static void setSpanWithPrependedNewline(SpannableStringBuilder builder, Object what) {
  builder.setSpan(what, 1, builder.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}

private static void setBlockSpan(SpannableStringBuilder builder, Object what) {
  int length = Math.max(0, builder.length() - 1);
  builder.setSpan(what, 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}

public void backspace() {
 int length = captionStringBuilder.length();
 if (length > 0) {
  captionStringBuilder.delete(length - 1, length);
 }
}

public boolean isEmpty() {
 return !isDefined() || (rolledUpCaptions.isEmpty() && captionStringBuilder.length() == 0);
}

 SpannableStringBuilder longDescription = new SpannableStringBuilder();
longDescription.append("First Part Not Bold ");
int start = longDescription.length();
longDescription.append("BOLD");
longDescription.setSpan(new ForegroundColorSpan(0xFFCC5500), start, longDescription.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
longDescription.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), start, longDescription.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
longDescription.append(" rest not bold");

SpannableStringBuilder builder = new SpannableStringBuilder();
 builder.append("My string. I ").append(" ");
 builder.setSpan(new ImageSpan(getActivity(), R.drawable.ic_action_heart),
     builder.length() - 1, builder.length(), 0);
 builder.append(" Cree by Dexode");
 textView.setText(builder);

private static void startFont(SpannableStringBuilder text,
    Attributes attributes) {
  String color = attributes.getValue("", "color");
  String face = attributes.getValue("", "face");
  int len = text.length();
  text.setSpan(new Font(color, face), len, len, Spannable.SPAN_MARK_MARK);
}

private static void startA(SpannableStringBuilder text, Attributes attributes) {
  String href = attributes.getValue("", "href");
  int len = text.length();
  text.setSpan(new Href(href), len, len, Spannable.SPAN_MARK_MARK);
}

 TextView text = (TextView)findViewById(R.id.text);

String simple = "Enter your name ";
String colored = "*";
SpannableStringBuilder builder = new SpannableStringBuilder();

builder.append(simple);
int start = builder.length();
builder.append(colored);
int end = builder.length();

builder.setSpan(new ForegroundColorSpan(Color.RED), start, end, 
        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

text.setText(builder);

private SpannableStringBuilder createSpannable(Drawable drawable) {
  String text = "bitmap";
  SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(text);
  ImageSpan span = new ImageSpan(drawable);//ImageSpan.ALIGN_BOTTOM);
  spannableStringBuilder.setSpan(span, 0, text.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
  spannableStringBuilder.append("图文混排");
  spannableStringBuilder.setSpan(new BackgroundColorSpan(Color.parseColor("#8A2233B1")), 0, spannableStringBuilder.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
  return spannableStringBuilder;
}

private SpannableStringBuilder createSpannable(Drawable drawable) {
  String text = "bitmap";
  SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(text);
  ImageSpan span = new ImageSpan(drawable);//ImageSpan.ALIGN_BOTTOM);
  spannableStringBuilder.setSpan(span, 0, text.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
  spannableStringBuilder.append("图文混排");
  spannableStringBuilder.setSpan(new BackgroundColorSpan(Color.parseColor("#8A2233B1")), 0, spannableStringBuilder.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
  return spannableStringBuilder;
}

private SpannableStringBuilder createSpannable(Drawable drawable) {
  String text = "bitmap";
  SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(text);
  ImageSpan span = new ImageSpan(drawable);//ImageSpan.ALIGN_BOTTOM);
  spannableStringBuilder.setSpan(span, 0, text.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
  spannableStringBuilder.append("图文混排");
  spannableStringBuilder.setSpan(new BackgroundColorSpan(Color.parseColor("#8A2233B1")), 0, spannableStringBuilder.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
  return spannableStringBuilder;
}

public static void replaceUnderlineSpans(SpannableStringBuilder builder, Resources resources) {
 UnderlineSpan[] underlineSpans = builder.getSpans(0, builder.length(), UnderlineSpan.class);
 for (UnderlineSpan span : underlineSpans) {
  int start = builder.getSpanStart(span);
  int end = builder.getSpanEnd(span);
  builder.removeSpan(span);
  builder.setSpan(new SquigglySpan(resources), start, end, 0);
 }
}

private static void end(SpannableStringBuilder text, Class kind,
    Object repl) {
  int len = text.length();
  Object obj = getLast(text, kind);
  int where = text.getSpanStart(obj);
  text.removeSpan(obj);
  if (where != len) {
    text.setSpan(repl, where, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
  }
}

/**
 * Called when the end of a paragraph is encountered. Adds a newline if there are one or more
 * non-space characters since the previous newline.
 *
 * @param builder The builder.
 */
/* package */ static void endParagraph(SpannableStringBuilder builder) {
 int position = builder.length() - 1;
 while (position >= 0 && builder.charAt(position) == ' ') {
  position--;
 }
 if (position >= 0 && builder.charAt(position) != '\n') {
  builder.append('\n');
 }
}

@TargetApi(Build.VERSION_CODES.M)
private void createLayoutM(int width, float lineSpacingAdd) {
  layout = StaticLayout.Builder.obtain(displayText, 0, displayText.length(), paint,
      width - titleInsetStart - titleInsetEnd)
      .setLineSpacing(lineSpacingAdd, 1f)
      .setMaxLines(maxLines)
      .setEllipsize(TextUtils.TruncateAt.END)
      .setBreakStrategy(BREAK_STRATEGY)
      .build();
  lineCount = layout.getLineCount();
}

 private static void handleP(SpannableStringBuilder text) {
  int len = text.length();

  if (len >= 1 && text.charAt(len - 1) == '\n') {
    if (len >= 2 && text.charAt(len - 2) == '\n') {
      return;
    }

    text.append("\n");
    return;
  }

  if (len != 0) {
    text.append("\n\n");
  }
}

@Test
public void testFontSizeWithEmptyValueIsIgnored() throws IOException, SubtitleDecoderException {
 TtmlSubtitle subtitle = getSubtitle(FONT_SIZE_EMPTY_TTML_FILE);
 assertThat(subtitle.getEventTimeCount()).isEqualTo(2);
 List<Cue> cues = subtitle.getCues(10 * 1000000);
 assertThat(cues).hasSize(1);
 SpannableStringBuilder spannable = (SpannableStringBuilder) cues.get(0).text;
 assertThat(String.valueOf(spannable)).isEqualTo("empty");
 assertThat(spannable.getSpans(0, spannable.length(), RelativeSizeSpan.class)).hasLength(0);
 assertThat(spannable.getSpans(0, spannable.length(), AbsoluteSizeSpan.class)).hasLength(0);
}

@Test
public void testFontSizeWithMissingUnitIsIgnored() throws IOException, SubtitleDecoderException {
 TtmlSubtitle subtitle = getSubtitle(FONT_SIZE_MISSING_UNIT_TTML_FILE);
 assertThat(subtitle.getEventTimeCount()).isEqualTo(2);
 List<Cue> cues = subtitle.getCues(10 * 1000000);
 assertThat(cues).hasSize(1);
 SpannableStringBuilder spannable = (SpannableStringBuilder) cues.get(0).text;
 assertThat(String.valueOf(spannable)).isEqualTo("no unit");
 assertThat(spannable.getSpans(0, spannable.length(), RelativeSizeSpan.class)).hasLength(0);
 assertThat(spannable.getSpans(0, spannable.length(), AbsoluteSizeSpan.class)).hasLength(0);
}