To je ale teplota baterky a ne okolí.

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, ifilter);

int temperature = batteryStatus.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);
if (temperature != -1) {
    float celsiusTemperature = temperature / 10.0;
}