static void android_server_BatteryService_update(JNIEnv* env, jobject obj)
{
    setBooleanField(env, obj, gPaths.acOnlinePath, gFieldIds.mAcOnline);
    setBooleanField(env, obj, gPaths.usbOnlinePath, gFieldIds.mUsbOnline);
    setBooleanField(env, obj, gPaths.wirelessOnlinePath, gFieldIds.mWirelessOnline);
    setBooleanField(env, obj, gPaths.batteryPresentPath, gFieldIds.mBatteryPresent);

    setIntFieldMax(env, obj, gPaths.batteryCapacityPath, gFieldIds.mBatteryLevel, 100);
    setVoltageField(env, obj, gPaths.batteryVoltagePath, gFieldIds.mBatteryVoltage);
    setIntField(env, obj, gPaths.batteryTemperaturePath, gFieldIds.mBatteryTemperature);

    const int SIZE = 128;
    char buf[SIZE];

    if (readFromFile(gPaths.batteryStatusPath, buf, SIZE) > 0)
        env->SetIntField(obj, gFieldIds.mBatteryStatus, getBatteryStatus(buf));
    else
        env->SetIntField(obj, gFieldIds.mBatteryStatus,
                         gConstants.statusUnknown);

    if (readFromFile(gPaths.batteryHealthPath, buf, SIZE) > 0)
        env->SetIntField(obj, gFieldIds.mBatteryHealth, getBatteryHealth(buf));

    if (readFromFile(gPaths.batteryTechnologyPath, buf, SIZE) > 0)
        env->SetObjectField(obj, gFieldIds.mBatteryTechnology, env->NewStringUTF(buf));
}
static void android_server_BatteryService_update(JNIEnv* env, jobject obj)
{
    setBooleanField(env, obj, gPaths.batteryPresentPath, gFieldIds.mBatteryPresent);

    setIntFieldMax(env, obj, gPaths.batteryCapacityPath, gFieldIds.mBatteryLevel, 100);
    setVoltageField(env, obj, gPaths.batteryVoltagePath, gFieldIds.mBatteryVoltage);
    setIntField(env, obj, gPaths.batteryTemperaturePath, gFieldIds.mBatteryTemperature);

    const int SIZE = 128;
    char buf[SIZE];

    if (readFromFile(gPaths.batteryStatusPath, buf, SIZE) > 0)
        env->SetIntField(obj, gFieldIds.mBatteryStatus, getBatteryStatus(buf));
    else
        env->SetIntField(obj, gFieldIds.mBatteryStatus,
                         gConstants.statusUnknown);

    if (readFromFile(gPaths.batteryHealthPath, buf, SIZE) > 0)
        env->SetIntField(obj, gFieldIds.mBatteryHealth, getBatteryHealth(buf));

    if (readFromFile(gPaths.batteryTechnologyPath, buf, SIZE) > 0)
        env->SetObjectField(obj, gFieldIds.mBatteryTechnology, env->NewStringUTF(buf));

    unsigned int i;
    String8 path;
    jboolean acOnline = false;
    jboolean usbOnline = false;
    jboolean wirelessOnline = false;

    for (i = 0; i < gChargerNames.size(); i++) {
        path.clear();
        path.appendFormat("%s/%s/online", POWER_SUPPLY_PATH,
                          gChargerNames[i].string());

        if (readFromFile(path, buf, SIZE) > 0) {
            if (buf[0] != '0') {
                path.clear();
                path.appendFormat("%s/%s/type", POWER_SUPPLY_PATH,
                                  gChargerNames[i].string());
                switch(readPowerSupplyType(path)) {
                case ANDROID_POWER_SUPPLY_TYPE_AC:
                    acOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_USB:
                    usbOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                    wirelessOnline = true;
                    break;
                default:
                    ALOGW("%s: Unknown power supply type",
                          gChargerNames[i].string());
                }
            }
        }
    }

    env->SetBooleanField(obj, gFieldIds.mAcOnline, acOnline);
    env->SetBooleanField(obj, gFieldIds.mUsbOnline, usbOnline);
    env->SetBooleanField(obj, gFieldIds.mWirelessOnline, wirelessOnline);
}