Android -- 获取CPU使用率_android获取手机cpuzhanyonglv

public static float getProcessCpuRate()
    {
 
        float totalCpuTime1 = getTotalCpuTime();
        float processCpuTime1 = getAppCpuTime();
        try
        {
            Thread.sleep(360);
        }
        catch (Exception e)
        {
        }
 
        float totalCpuTime2 = getTotalCpuTime();
        float processCpuTime2 = getAppCpuTime();
 
        float cpuRate = 100 * (processCpuTime2 - processCpuTime1)
                / (totalCpuTime2 - totalCpuTime1);
 
        return cpuRate;
    }
 
    public static long getTotalCpuTime()
    {   // 获取系统总CPU使用时间
        String[] cpuInfos = null;
        try
        {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    new FileInputStream("/proc/stat")), 1000);
            String load = reader.readLine();
            reader.close();
            cpuInfos = load.split(" ");
        }