adb shell dumpsys 命令

adb_shell

dumpsys

adb shell 进入shell 环境执行dumpsys命令
dumpsys Service [cmd]

dumpsys --help
usage: dumpsys
         To dump all services.
or:
       dumpsys [-t TIMEOUT] [--help | -l | --skip SERVICES | SERVICE [ARGS]]
         --help: shows this help
         -l: only list services, do not dump them
         -t TIMEOUT: TIMEOUT to use in seconds instead of default 10 seconds
         --skip SERVICES: dumps all services but SERVICES (comma-separated list)
         SERVICE [ARGS]: dumps only service SERVICE, optionally passing ARGS to it

# 列出当前的所有服务名
dumpsys -l

# 列出当前所有的Service和对应的服务,配合dumpsys命令查看指定Service信息
srevice list

dumpsys activity

# 查看ActivityManagerService相关功能
dumpsys activity -h

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
    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.

dumpsys activity activities或者dumpsys activity a查看Activity堆栈信息

查看Activity/Task信息

dumpsys activity

查看指定包名当前窗口显示布局结构信息，如果不在当前窗口，则报错

dumpsys activity pkg

查看处于当前栈顶的Window和Activity

adb shell dumpsys window windows | grep -E 'mCurrentFocus'
adb shell dumpsys activity | grep mFocusedActivity

dumpsys meminfo

不指定包，查看内存信息：

dumpsys meminfo

查看指定包的内存信息：

dumpsys meminfo pgk -d

查看是否内存泄漏

adb shell dumpsys meminfo packagename -d
在进入一个界面之前查看一遍Activity和View的数量，在退出这个界面之后再查看一遍Activity和View的数量，对比进入前和进入后Activity和View数量的变化情况，如果有差异，则说明存在内存泄露（在使用命令查看Activity和View的数量之前，记得手动触发GC）。