Android 开发中根据搜索内容实现TextView中的文字部分加粗

@SuppressLint("ParcelCreator")
public class SearchStyleSpan extends StyleSpan {
 public SearchStyleSpan(int style) {
  super(style);
 }
 @Override
 public void updateDrawState(TextPaint ds) {
  ds.setFakeBoldText(true);
  //FIXME 这里还可以做其他差异性设置（修改文字大小等）
  super.updateDrawState(ds);
 }
 @Override
 public void updateMeasureState(TextPaint paint) {
  paint.setFakeBoldText(true);
  super.updateMeasureState(paint);
 }
}

mEditText.addTextChangedListener(new TextWatcher() {
   @Override
   public void beforeTextChanged(CharSequence s, int start, int count, int after) {
   }
   @Override
   public void onTextChanged(CharSequence s, int start, int before, int count) {
   }
   @Override
   public void afterTextChanged(Editable editable) {
    checkSearchContent(mEditText.getText().toString());
   }
  });

SpannableStringBuilder searchStyle = new SpannableStringBuilder();
  int start;
  while (content.contains(searchContent)) {
   start = content.indexOf(searchContent);
   searchStyle.append(getBoldSpannable(content.substring(0, start + searchContent.length()), searchContent));
   content = content.substring(start + searchContent.length());
  }
  searchStyle.append(content);

 int start = content.indexOf(searchContent);
  SpannableStringBuilder ssb = new SpannableStringBuilder(content);
  ssb.setSpan(new SearchStyleSpan(Typeface.NORMAL), start, start + searchContent.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);