android 如何获取CPU频率(HZ)

如何得知自己的手机CPU频率是多少呢？有的手机可以如同查看SD卡容量信息一样查看处理器信息

比如：android 2.3系统，设置 -> 关于手机 -> 硬件信息，即可看到

但是也有很多手机并没有提供这样的UI展示，别着急，这里还有一个方法。

如下操作：

这里的550000就是我们要找的CPU频率，注意单位是KHZ.

通过读取文件/proc/cpuinfo系统CPU的类型等多种信息。

读取/proc/stat 所有CPU活动的信息来计算CPU使用率

 

下面我们就来讲讲如何通过代码来获取CPU频率：

package com.orange.cpu;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;

public class CpuManager {

        // 获取CPU最大频率（单位KHZ）

     // "/system/bin/cat" 命令行

     // "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" 存储最大频率的文件的路径

        public static String getMaxCpuFreq() {
                String result = "";
                ProcessBuilder cmd;
                try {
                        String[] args = { "/system/bin/cat",
                                        "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" };
                        cmd = new ProcessBuilder(args);
                        Process process = cmd.start();
                        InputStream in = process.getInputStream();
                        byte[] re = new byte[24];
                        while (in.read(re) != -1) {
                                result = result + new String(re);
                        }
                        in.close();
                } catch (IOException ex) {
                        ex.printStackTrace();
                        result = "N/A";
                }
                return result.trim();
        }

         // 获取CPU最小频率（单位KHZ）
        public static String getMinCpuFreq() {
                String result = "";
                ProcessBuilder cmd;
                try {
                        String[] args = { "/system/bin/cat",
                                        "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq" };
                        cmd = new ProcessBuilder(args);
                        Process process = cmd.start();
                        InputStream in = process.getInputStream();
                        byte[] re = new byte[24];
                        while (in.read(re) != -1) {
                                result = result + new String(re);
                        }
                        in.close();
                } catch (IOException ex) {
                        ex.printStackTrace();
                        result = "N/A";
                }
                return result.trim();
        }

         // 实时获取CPU当前频率（单位KHZ）
        public static String getCurCpuFreq() {
                String result = "N/A";
                try {
                        FileReader fr = new FileReader(
                                        "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
                        BufferedReader br = new BufferedReader(fr);
                        String text = br.readLine();
                        result = text.trim();
                } catch (FileNotFoundException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
                return result;
        }

        // 获取CPU名字
        public static String getCpuName() {
                try {
                        FileReader fr = new FileReader("/proc/cpuinfo");
                        BufferedReader br = new BufferedReader(fr);
                        String text = br.readLine();
                        String[] array = text.split(":\\s+", 2);
                        for (int i = 0; i < array.length; i++) {
                        }
                        return array[1];
                } catch (FileNotFoundException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
                return null;
        }
}

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Android中如何获得系统相关的信息（比如CPU使用率，内存的总量和已用的量）

android 的cpu 硬盘 内存 网络设置 系统信息 硬件信息