SpannableStringBuilder to create String with multiple fonts/text sizes etc Example?

Question

I need to create a String placed in a TextView that will display a string like this:

First Part Not Bold BOLD rest not bold

Answer 1

So I know this has been solved, and even as requested with SpannableStringBuilder but in the event you wanted to build a string more dynamically I figured I would put this up.

// Stuff needed
TextView DataTextView = (TextView)rootView.findViewById(R.id.DataView);
String Fields[] = {...database column names as strings... "x","y"};

String DataString = new String();   

int start,stop;     // Start and Stop of formatting

// Final Result
SpannableStringBuilder coloredString = new SpannableStringBuilder(); 

SpannableString temp;       // Small segment of colored string
for (int i =0; i < Fields.length; i++)
{
    if (database_result.containsKey(Fields[i]))  // Be sure a field exists in the ContentValues
    {
            DataString = Fields[i]+": ";
        start = DataString.length();
        DataString = DataString+ +database_result.getAsInteger(Fields[i])+" ";
        stop= DataString.length();
        temp = new SpannableString(DataString);
        temp.setSpan(new ForegroundColorSpan(Color.WHITE),start, stop, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        coloredString.append(temp);
    }   
}
DataTextView.setText(coloredString);

database_result is a ContentValues type that I constructed from the returned Cursor type of the SQL query. The only problem I had with this was at first it was only ColorSpaning the first segment. It seams that you need to declare a new ForegroundColorSpan every time you want to use one (or any other kind of span) in a loop.

Answer 2

First Part Not Bold   BOLD  rest not bold

You can do this either as @Rajesh suggested or by this.

String normalBefore= "First Part Not Bold ";
String normalBOLD=  "BOLD ";
String normalAfter= "rest not bold";
String finalString= normalBefore+normalBOLD+normalAfter;
Spannable sb = new SpannableString( finalString );
sb.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), finalString.indexOf(normalBOLD)+ normalBOLD.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //bold
sb.setSpan(new AbsoluteSizeSpan(intSize), finalString.indexOf(normalBOLD)+ normalBOLD.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//resize size

to show this in TextView

textview.setText(sb,  TextView.BufferType.SPANNABLE);

Answer 3

We can also use SpannableStringBuilder with TextAppearanceSpan to accomplish that. Follow the below steps to implement like that.

1. Create a style in styles.xml.

<style name="BoldStyle">
   <!-- Can add other styling attributes -->
   <item name="android:textStyle">bold</item>
   ......
</style>

2. Use the below code.

SpannableStringBuilder builder = new SpannableStringBuilder("First Part Not Bold BOLD rest not bold");
builder.setSpan(new TextAppearanceSpan(this, R.style.BoldStyle), 20, 24, 0);
((TextView)findViewById(R.id.tv7)).setText(builder);

That's it. Hope it'll help someone.