framework/tests/bumble/src/android/bluetooth/Utils.java

package android.bluetooth;

import com.google.protobuf.ByteString;

public final class Utils {
    public static String addressStringFromByteString(ByteString bs) {
        StringBuilder refAddrBuilder = new StringBuilder();
        for (int i = 0; i < bs.size(); i++) {
            if (i != 0) {
              refAddrBuilder.append(':');
            }
            refAddrBuilder.append(String.format("%02X", bs.byteAt(i)));
        }
        return refAddrBuilder.toString();
    }
}