I can't get data by I2C bus in Android Things

I can't get data by I2C bus in Android Things on Raspberry Pi 3.

I connect Android Things on RPi and DS18B20(Temperature Sensor). Connect to RPi

and run the I2C address scan App (https://github.com/dennisg/i2c-address-scanner), but can't find available address.

    for (int address = 0; address < 256; address++) {

        //auto-close the devices
        try (final I2cDevice device = peripheralManagerService.openI2cDevice(BoardDefaults.getI2cBus(), address)) {

            try {
                device.readRegByte(TEST_REGISTER);
                Log.i(TAG, String.format(Locale.US, "Trying: 0x%02X - SUCCESS", address));
            } catch (final IOException e) {
                Log.i(TAG, String.format(Locale.US, "Trying: 0x%02X - FAIL", address));
            }

        } catch (final IOException e) {
            //in case the openI2cDevice(name, address) fails
        }
    }

How do I get data by I2C?

As Nick Felker wrote in his answer DS18B20 has 1-Wire interface and you can't connect it to Raspberry Pi with Android Things directly. You should use industrial (e.g DS2482-100) or custom MCU-based (like in that project) 1-Wire <-> I2C converter, or other (e.g. USB <-> 1-Wire, UART<-> 1-Wire) converters.