Double parameter with 2 digits after dot in strings.xml?

Just adding to @David Airam's answer here; the "incorrect" solution he gives is actually correct, but with a bit of tweaking. The XML file should contain:

<string name="resource1">Hello string: %1$s, and hello float: %2$.2f.</string>

Now in the Java code:

String svalue = "test";
float sfloat= 3.1415926;
String sresult = getString(R.string.resource1, svalue, sfloat);

The exception that @David Airam reported is from trying to jam a String into a format specifier with %f, which requires a floating point type. Use float and there is no such exception.

Also, you can use Float.valueOf() to convert a String to a float in case your input data was originally a string (say, from a EditText or something). However, you should always try/catch valueOf() operations and handle the NumberFormatException case, since this exception is unchecked.

%.1f work for me if you like to show only 1 digit after ','

A simpler approach:

<string name="decimalunit">%.2f%n</string>

float sfloat= 3.1475926; String sresult = getString(R.string.decimalunit, sfloat);

Output: 3.15

Define is strings.xml file

  <string name="price_format">$%,.2f</string>

//For using in databinding  where amount is double type
    android:text="@{@string/price_format(model.amount)}"

//For using in java runtime where priceOfModifier is double type
                amountEt.setText(context.getResources().getString(R.string.price_format, priceOfModifier));