Android dump使用

Posted 2022-11-21 他叫小黑

简介

dumpsys是android提供的系统工具，可以用来查看所有系统服务的信息。
在命令行输入如下命令，就可以罗列出当前所有的系统服务名：

dumpsys -l

dumpsys 后面加上列出的系统服务名即可只输出特定服务的信息。如下面指令会输出Activity任务栈的信息。

dumpsys activity

直接dumpsys 某个service打出的信息量很大，可以有选择性的添加一些参数进行过滤。具体参数可以通过执行-h参数命令来查看帮助信息。如下

# dumpsys activity -h                                                   
Activity manager dump options:
  [-a] [-c] [-p PACKAGE] [-h] [WHAT] ...
  WHAT may be one of:
    a[ctivities]: activity stack state
    r[recents]: recent activities state
    b[roadcasts] [PACKAGE_NAME] [history [-s]]: broadcast state
    broadcast-stats [PACKAGE_NAME]: aggregated broadcast statistics
    i[ntents] [PACKAGE_NAME]: pending intent state
    p[rocesses] [PACKAGE_NAME]: process state
    o[om]: out of memory management
    perm[issions]: URI permission grant state
    prov[iders] [COMP_SPEC ...]: content provider state
    provider [COMP_SPEC]: provider client-side state
    s[ervices] [COMP_SPEC ...]: service state
    as[sociations]: tracked app associations
    settings: currently applied config settings
    service [COMP_SPEC]: service client-side state
    package [PACKAGE_NAME]: all state related to given package
    all: dump all activities
    top: dump the top activity
  WHAT may also be a COMP_SPEC to dump activities.
  COMP_SPEC may be a component name (com.foo/.myApp),
    a partial substring in a component name, a
    hex object identifier.
  -a: include all available server state.
  -c: include client state.
  -p: limit output to given package.
  --checkin: output checkin format, resetting data.
  --C: output checkin format, not resetting data.

---

使用

上面介绍的都是系统服务的用法，那我们自己写的应用如何使用呢？
App只需要继承Service后重写dump方法就可以进行dumpsys打印了。

public class TestService extends Service 
    @Override
    public IBinder onBind(Intent intent) 
        return null;
    
    @Override
    protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) 
        writer.println("Test dump");
    

service启动之后就可以dumpsys activity service指令在命令行打印dump方法内容了。

# dumpsys activity service TestService                          
SERVICE android.examples.com/.TestService 864e7ea pid=2781
  Client:
    Test dump

---

谷歌文档
好文推荐