高通msm8909获取温度

public static String readLine(int cpu) throws IOException {        String filename = "";        if (cpu == modem){//射频            filename = "/sys/devices/virtual/thermal/thermal_zone0/temp";        }else if (cpu == cpu0_cpu2){            filename = "/sys/devices/virtual/thermal/thermal_zone3/temp";        }else if (cpu == cpu1_cpu3){            filename = "/sys/devices/virtual/thermal/thermal_zone4/temp";        }else if (cpu == qdsp_cam){//cam数据处理            filename = "/sys/devices/virtual/thermal/thermal_zone1/temp";        }        BufferedReader reader = new BufferedReader(new FileReader(filename), 256);        try {            return reader.readLine() + "℃";        } finally {            reader.close();        }    }