How to pass Hex values to a string - Android

Question

I need to create a String from hex values I'm providing.

For example, instead of assigning like this:

String message = "123";

I want to assign like this:

String message = 0x31, 0x32, 0x33;

Is that possible?

Answer 1

You should probably also specify the character set you are using but this will do it:

String message = new String(new byte[] {0x31, 0x32, 0x33});
System.out.println(message); // prints 123.

If you did want to specify the character set it is just another parameter to the String constructor. The following example will work if targeting Android API 19+:

String message = new String(new byte[] {0x31, 0x32, 0x33}, StandardCharsets.UTF_8);