Change color for particular char in the TextView String.

SpannableTextview.java

/*default initializations for android activity file*/

/* here we gone a simple implementaion for Dollar Sign based on the type specified 
R.string.Dollar ="$$$$"
*/

SpannableStringBuilder builder = new SpannableStringBuilder();
      Textview textView_colchar=(TextView)findViewById(R.id.textView_colchar);
        int type=1; //change based on the type needed ...
        switch (type){
            case 1:{
                SpannableString str1= new SpannableString(getString(R.string.dollar));
                str1.setSpan(new ForegroundColorSpan(Color.CYAN), 0, str1.length()-3, 0);
                builder.append(str1);
                textView_colchar.setText( builder, TextView.BufferType.SPANNABLE);
            }
            break;
            case 2:{
                SpannableString str1= new SpannableString(getString(R.string.dollar));
                str1.setSpan(new ForegroundColorSpan(Color.CYAN), 0, str1.length()-2, 0);
                builder.append(str1);
                textView_colchar.setText( builder, TextView.BufferType.SPANNABLE);
            }
            break;
            case 3:{
                SpannableString str1= new SpannableString(getString(R.string.dollar));
                str1.setSpan(new ForegroundColorSpan(Color.CYAN), 0, str1.length()-1, 0);
                builder.append(str1);
                textView_colchar.setText( builder, TextView.BufferType.SPANNABLE);
            }
            break;
            case 4:{
                SpannableString str1= new SpannableString(getString(R.string.dollar));
                str1.setSpan(new ForegroundColorSpan(Color.CYAN), 0, str1.length(), 0);
                builder.append(str1);
                textView_colchar.setText( builder, TextView.BufferType.SPANNABLE);
            }
            break;
        }