[Android]tips for android framework development

最新推荐文章于 2025-06-30 09:38:54 发布

原创最新推荐文章于 2025-06-30 09:38:54 发布 · 198 阅读

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#logcat #dumpsys #addr2line #diff&amp;amp;amp;find&amp;amp;amp;grep

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本文围绕Android开发展开，介绍了抓取信息的方法，如使用adb logcat抓取日志、dumpsys获取内存和CPU信息等；还涉及计数、对比查找、改变用户和群组属性等操作，以及apk的dump和信息查看，帮助开发者进行问题定位和信息获取。

Please note that:本文章为原创，若需转载，请指明该出处.

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PartI:抓取信息
1.main&kernel log
adb logcat -c
adb logcat -v threadtime | tee logcat.log

adb logcat -v threadtime -b kernel -c
adb logcat -v threadtime -b kernel | tee kernel.log

2.bugreport
adb shell debuggerd -b $(process_pid)

3.memory&cpu info
adb shell dumpsys meminfo $(process_pid)
adb shell dumpsys cpuinfo $(process_pid)

4.dumpsys
adb shell dumpsys -l | grep "media" //media related services
adb shell dumpsys <service_name>

5.addr2line
tool path:android-ndk-r11c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-addr2line

usage:arm-linux-androideabi-addr2line -C -f -e XXX.so 地址 //定位崩溃点在源代碼中的文件，函数及行号 //so是/symbols目录下的
e.g. arm-linux-androideabi-addr2line -C -f -e ./out/target/product/<chipset>/symbols/system/lib/libstagefright_soft_hevcdec.so 00021f3c

PartII:计数
1.查看cpu个数
cat /proc/cpuinfo| grep "processor"| wc -l

2.查看进程的fd
ls /proc/pid/fd -al | wc

PartIII:对比&查找
1.diff
diff -urNa dir1 dir2 > diff_txt

2.find&grep
find . -name "MediaCodec.cpp" | xargs grep -nriE "acodec"
grep -nriE mediacodec.cpp

PartIV:改变用户和群组
1.命令chown改其属性:
sudo chown root:root <application>
2. 将其权限更改一下：
sudo chmod +s <application>

PartV:apk

5.1 apk dump
(1)adb shell pm list packages | grep "com.google.android.apps.photos"
(2)adb shell pm path com.google.android.apps.photos
=>
package:/data/app/com.google.android.apps.photos-1/base.apk

5.2 apk information
aapt dump badging <app path and name>

example:
C:\Users\SH-NB-0059\AppData\Local\Android\Sdk\build-tools\28.0.3>aapt dump badging D:\2-tools\apk\google_photos.apk > E:\photos.txt
=>
package: name='com.google.android.apps.photos' versionCode='2181689' versionName='3.12.0.182420554' platformBuildVersionName='8.1.0'
install-location:'auto'
sdkVersion:'16'
targetSdkVersion:'26'