同一个TextView设置不同的颜色和大小

//strategy1是一个TextView
SpannableStringBuilder builder1 = new SpannableStringBuilder(strategy1.getText().toString());
//设置前景色为蓝色
ForegroundColorSpan blue=new ForegroundColorSpan(Color.BLUE);
//改变第0-3个字体颜色为蓝色
builder1.setSpan(blue,0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
//改变第0-3个字体大小
builder1.setSpan(new AbsoluteSizeSpan(55),0,3,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

strategy1.setText(builder1);