When I first saw %1$s and %2$d in the accepted answer, it made no sense. Here is a little more explanation.
They are called format specifiers. In the xml string they are in the form of
%[parameter_index$][format_type]
1$, 2$, and 3$. The order you place them in the resource string doesn't matter, only the order that you supply the parameters.format type: There are a lot of ways that you can format things (see the documentation). Here are some common ones:
s stringd decimal integerf floating point numberWe will create the following formatted string where the gray parts are inserted programmatically.
My sister
Maryis12years old.
string.xml
<string name="my_xml_string">My sister %1$s is %2$d years old.</string>
MyActivity.java
String myString = "Mary";
int myInt = 12;
String formatted = getString(R.string.my_xml_string, myString, myInt);
getString because I was in an Activity. You can use context.getResources().getString(...) if it is not available.String.format() will also format a String.1$ and 2$ terms don't need to be used in that order. That is, 2$ can come before 1$. This is useful when internationalizing an app for languages that use a different word order.%1$s multiple times in the xml if you want to repeat it.%% to get the actual % character.