I have searched internet and tried the following code but its not working
SpannableString ss1 = new SpannableString(\"Health: \");
ss1.setSpan(new and
String txt1="Health: ";
SpannableString txtSpannable= new SpannableString(txt1);
StyleSpan boldSpan = new StyleSpan(Typeface.BOLD);
txtSpannable.setSpan(boldSpan, 0, 8, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
builder.append(txtSpannable);
String txt2="good";
builder.append(txt2);
textview1.lblStatus.setText(builder, TextView.BufferType.SPANNABLE);