Android获取cpu使用率和内存占用[转]

其中获取cpu使用率转自：https://my.oschina.net/u/1429862/blog/223371

    public static float getProcessCpuRate()
     {
        
       float totalCpuTime1 = getTotalCpuTime();
       float processCpuTime1 = getAppCpuTime();
       try
       {
           Thread.sleep(360);  //sleep一段时间
       }
       catch (Exception e)
       {
       }
        
       float totalCpuTime2 = getTotalCpuTime();
       float processCpuTime2 = getAppCpuTime();
        
       float cpuRate = 100 * (processCpuTime2 - processCpuTime1) / (totalCpuTime2 - totalCpuTime1);//百分比
        
       return cpuRate;
     }

     // 获取系统总CPU使用时间
    public static long getTotalCpuTime()
    {
        String[] cpuInfos = null;
        try
        {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    new FileInputStream("/proc/stat")), 1000);
            String load = reader.readLine();
            reader.close();
            cpuInfos = load.split(" ");
        }
        catch (IOException ex)
        {
            ex.printStackTrace();
        }
        long totalCpu = Long.parseLong(cpuInfos[2])
                + Long.parseLong(cpuInfos[3]) + Long.parseLong(cpuInfos[4])
                + Long.parseLong(cpuInfos[6]) + Long.parseLong(cpuInfos[5])
                + Long.parseLong(cpuInfos[7]) + Long.parseLong(cpuInfos[8]);
        return totalCpu;
    }

     // 获取应用占用的CPU时间
    public static long getAppCpuTime()
    {
        String[] cpuInfos = null;
        try
        {
            int pid = android.os.Process.myPid();
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    new FileInputStream("/proc/" + pid + "/stat")), 1000);
            String load = reader.readLine();
            reader.close();
            cpuInfos = load.split(" ");
        }
        catch (IOException ex)
        {
            ex.printStackTrace();
        }
        long appCpuTime = Long.parseLong(cpuInfos[13])
                + Long.parseLong(cpuInfos[14]) + Long.parseLong(cpuInfos[15])
                + Long.parseLong(cpuInfos[16]);
        return appCpuTime;
    }
     // 获取应用占用的内存(单位为KB)
    public static String getAppMemory()
    {
        String info=null;
        try
        {
            int pid = android.os.Process.myPid();
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    new FileInputStream("/proc/" + pid + "/status")), 1000);
            String load;
            while((load = reader.readLine())!=null)
            {
                load=load.replace(" ","");
                String[]Info=load.split("[: k K]");
                if(Info[0].equals("VmRSS"))
                {
                    info=Info[1];
                    break;
                }

            }
            reader.close();
        }
        catch (IOException ex)
        {
            ex.printStackTrace();
        }

        return info;
    }