Use Placeholder with % sign in string.xml for String.format()

Question

I am Using placeholder %1$d in string.xml for int value, and then I want to display % sign in same TextView so it's %. So I've use it like this.

<string name="uploadProgress">%1$d&#37;<string>

Now in Java Code I used it like this.

int progress = 10;
textView.setText(String.format(getString(R.string.uploadProgress), progress));

But it is showing:

java.util.UnknownFormatConversionException: Conversion:

I Tried with:

1. % instead of %
   
2. Put a Space between %1$d and %(But I don't want space actually.)
   

But no luck. How can I achieve this? I've looked another SO questions for solution but I'm not able to find particular one.

Answer 1

I've run into this as well. There are two ways to escape a literal percent symbol in XML string resources.

For your case (a string with parameters, e.g. %1$d) you should use %% to escape the percent symbol literal.

If your string does not have parameters, then you should use \u0025 to escape the literal percent symbol.

If you use %%in a string without parameters, then getString() will resolve it as a literal %% instead of escaping it. If you use \u0025 in a string with parameters, then getString() will crash trying to treat that % as a format parameter.