Variables in android strings.xml

Variables can be used in the strings defined in strings.xml using the c programming like printf  ‘%d’ syntax. This is because getString (int resId, Object… formatArgs) passes the string through Formatter.
First define a string in the strings.xml file (usually res/values/strings.xml).

<string name="unread_messages">You have %d unread messages.</string>

This string has a variable %d that will be replaced in the next step of our android java code.

String message = getString(R.string.unread_messages, 25);

In the example above, getString substitutes %d for the integer 25 in the string message.
Output will be: You have 25 unread messages.

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Tushar Roy

Software Engineer (Backend engineer), Android Developer,

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