Change Font size programmatically in Android

Question

Hi I'm a newbie in android. I just wanted to know if there is any way to change the font size of a String in android?

String name = db.getName(Id)
String str = "Name : " + name;

I want to have "Name" with bigger font size than the value in "name".Where "name" is the value I get from the database.

Please do suggest any method to do this!! Thanks in advance!!

Solution 1

You do not change the font size of a String instead you change the font size of the text when you display the String(for instance in the TextView if you are using one). A String is simply a data object holding the text you want to display and has nothing to do with the way you display it.

Solution 2

Use

TextView textView = (TextView) findViewById(R.id.textView);
Spannable span = new SpannableString(str);
span.setSpan(new RelativeSizeSpan(0.8f), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(span);

on a TextView to get different TextSizes.

Solution 3

When you are putting the text into a textView you can increase the font. For example

textView.setText(yourString);
textView.setTextSize(20);

Or you can give the font size in the Layout.xml file itself

<TextView
      android:id = "@+id/textView"
       ........
       android:textSize = "20dp"/>

Please feel free to ask any further doubts if you need further clarifications.

Solution 4

You need to use a Spannable and give it to your TextView in order to modify just a portion of the text. To change the size use :

 span.setSpan(new RelativeSizeSpan(0.8f), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

View more solutions

Comments

[Deepthi]

Thanks for the response and what if I want to display the string in a listview

[Deepthi]

Avadhani: Thanks for the help. So it seems its impossible to change font size of a String!! :(

[pvn]

@Deepthi why does it seem so deepti, setTextSize() works. Do let me know, I will try to help out.

[Avadhani Y]

@Deepthi yes. A string is just the representation of some text. Applying some style information depends on the GUI framework. Do u understand?

[Stephane Mathis]

You can do the same thing, but you will have to create a custom class that implements the adapter (ie: ArrayAdapter or BaseAdapter) that you need and override the getView() method.

[Deepthi]

Avadhani: Yes I do.. but I wanted to display this string in a listview

[Deepthi]

Stephane Mathis:k thanks a lot :) U mean I need to create a custom listview right?

[Deepthi]

MoJo: Thanks for the help.. I'll have a look at it.. :)

[Stephane Mathis]

No, just a custom Adapter to give to your listview. Take a look a this example : http://www.ezzylearning.com/tutorial.aspx?tid=1763429 and the WeatherAdapter.java.

[Avadhani Y]

Then use Custom Adapter... Set the String to the listview and change the size as well

[Avadhani Y]

@Deepthi Found the solution for ur question from here?

[Ankit Mishra]

could you explain your answer please?