在Android应用程序的跟踪长期CPU使用率 [英] Tracking long-term CPU usage of apps in android

问题描述

有什么办法，我可以，过一段说一个星期，看到每个应用程序有多少CPU使用？我能想到的唯一的办法就是反复解析顶出，但似乎并不像最有效的方式做到这一点。有没有更好的办法？

Is there any way that I can, over a period of say a week, see how much CPU each app uses? The only way that I can think of is to repeatedly parse top output but that doesn't seem like the most efficient way to do it. Is there a better way?

要添加一些情况下，基本上是手机本身的SDK traceview功能：的http://developer.android.com/guide/developing/debugging/debugging-tracing.html

To add some context, basically the traceview functionality of the SDK on the phone itself: http://developer.android.com/guide/developing/debugging/debugging-tracing.html

推荐答案

您可以使用的调试类监视进程

You can use the Debug class to monitor the processes

或使用该功能来计算CPU使用率

or use this function to calculate CPU usage

使用的/ proc / STAT / 总CPU使用率（适用于所有的CPU）。对于每个进程的使用

Use /proc/stat/ for the total CPU usage (for all CPU's) . For per process usage

private float readCpuUsage(int pid) {
    try {
        RandomAccessFile reader = new RandomAccessFile("/proc/" + pid + "/stat", "r");
        String load = reader.readLine();

        String[] toks = load.split(" ");

        long idle1 = Long.parseLong(toks[5]);
        long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])
              + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

        try {
            Thread.sleep(360);
        } catch (Exception e) {}

        reader.seek(0);
        load = reader.readLine();
        reader.close();

        toks = load.split(" ");

        long idle2 = Long.parseLong(toks[5]);
        long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])
            + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

        return (float)(cpu2 - cpu1) / ((cpu2 + idle2) - (cpu1 + idle1));

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

    return 0;
} 

<分> source

要获得正在运行的进程列表

To get the list of running processes

ActivityManager mgr = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> allTasks = mgr.getRunningTasks(showLimit);
/* Loop through all tasks returned. */
for (ActivityManager.RunningTaskInfo aTask : allTasks) 
{                  
    Log.i("MyApp", "Task: " + aTask.baseActivity.getClassName()); 
}

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