if(sr!=null){
String str=childlist.get(groupPosition).get(childPosition).getTitle();
int indexOf = str.indexOf(sr);
if(indexOf != -1){
int end = indexOf+sr.length();
SpannableStringBuilder builder = new SpannableStringBuilder(str );
ForegroundColorSpan redSpan = new ForegroundColorSpan(Color.RED);
builder.setSpan(redSpan, indexOf, end, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
itemtitle.setText(builder);
}