Android 中所有正在运行的进程列表 [英] List of All running processes in Android

问题描述

如何获取Android系统的所有正在运行的进程列表，包括系统启动的进程?

我尝试使用以下代码获取列表:

ActivityManager activityManager = (ActivityManager) this.getSystemService( ACTIVITY_SERVICE );ListprocInfos = activityManager.getRunningAppProcesses();

这给了我com.android.phone、com.android.chrome等进程列表

但是当我在我的 adb shell 中运行一个 ps 命令时，我可以看到其他一堆正在运行的进程.我附上了在我的系统中运行的所有这些进程的屏幕截图.

可以看到，Android System 的几个进程也在运行，比如/system/bin/vold 和 /system/bin/installed 等>

但是，getRunningAppProcesses() API 不会报告这些.在它的文档中，它说这个 API:

<块引用>

返回在设备上运行的应用进程列表.

这是否意味着它不会返回系统进程"?如果是这种情况，开发人员必须迭代所有"选项的选项是什么?在 Android 上运行的进程?

-- 我还尝试了什么:尝试使用 ActivityManager 中的另外 2 个 API:

1. getRecentTasks(int maxNum) 和它的变体.

但 Android 文档警告其使用如下:

<块引用>

此方法已在 API 级别 21 中弃用.

从 LOLLIPOP 开始，此方法不再适用于第三方应用程序

2. getRunningServices(int maxNum)

但是这两个都不能给我像 /system/bin/debuggerd 之类的名字

注意:我在非根设备上运行 Android-4.2 Jellybean.

解决方案

通过从 ActivityManager 调用 API，您只会获得注册到它的应用程序 - 即 UI 活动 - 并且不是所有流程.您看到的那些具有非反向 DNS 名称但路径(例如 /system/bin/*)是本机守护进程，由 init 启动，并被排除在ActivityManager.

解决此问题的一种方法是直接从 /proc 获取进程列表(就像工具箱的 ps 所做的那样).这需要以编程方式遍历那里的目录(即 /proc/[0-9]*)，并修剪内核线程.内核线程是那些 PPID 为 2 的线程，因此它们很容易.本机守护程序的 PPID 为 1.应用程序的 PPID 为 Zygote.

参考:NewAndroidBook.com

How to get the list of Android system's All running process including System launched processes?

I tried to get the list using below code:

ActivityManager activityManager = (ActivityManager) this.getSystemService( ACTIVITY_SERVICE );
List<RunningAppProcessInfo> procInfos = activityManager.getRunningAppProcesses();

This gave me the List of processes such as com.android.phone, com.android.chrome, etc.

But when I run a ps command in my adb shell, I could see whole other bunch of processes running. I am attaching the screenshot of all those processes running in my system.

As one can see, there are several Android System's processes are also running like /system/bin/vold and /system/bin/installed, etc.

However, these are not reported by getRunningAppProcesses() API. In its docs, it says that this API:

Returns a list of application processes that are running on the device.

Does this mean it won't return "system process"? And if that is the case what option developer can have to iterate over "ALL" process running on Android?

-- What else I tried: Tried with 2 more APIs from ActivityManager:

1. getRecentTasks(int maxNum) and it's variant.

But Android docs warns about its use as below:

This method was deprecated in API level 21.

As of LOLLIPOP, this method is no longer available to third party applications

2. getRunningServices(int maxNum)

But both of these could not give me names like /system/bin/debuggerd, etc.

NOTE: I am running Android-4.2 Jellybean, on Non-Rooted device.

解决方案

By calling an API from ActivityManager, you're only getting the applications which registered with it - that is, UI activities - and not all the processes. Those you see with a non-reverse DNS name, but a path (e.g. /system/bin/*) are native daemons, started by init, and left out of the ActivityManager.

One way around this is to get the list of processes directly from /proc (just like toolbox's ps does it). This requires iterating programmatically over the directories there, (i.e. /proc/[0-9]*), and pruning out the kernel threads. Kernel threads are those with a PPID of 2, so they're easy. Native daemons will have a PPID of 1. Applications will have a PPID of Zygote.

Reference: NewAndroidBook.com

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