Android Development ToolsDebugging / Profiling

Joachim Pfeiffer joachim.pfeiffer at gmail dot com

San Francisco Android User’s Group27 April 2010

Presentation Topics

• Resources• Android Debug Bridge (adb)• sqlite3• Dalvik Debug Monitor Service (ddms)• Traceview• Emulator (focus on dev tools)• Discussion

Resources

• Google Android Developer Guidehttp://developer.android.com/guide/developing/tools/index.html

• Google I/O 2009 session videosMattson: http://code.google.com/events/io/2009/sessions/DebuggingArtsNinjaMasters.htmlGuy:http://code.google.com/events/io/2009/sessions/TurboChargeUiAndroidFast.html

Android Developer Bridge (adb)

• Launch from CLI, e.g. Cygwin• Install / uninstall apps $adb install, adb uninstall

• Push / pull files $ adb push, adb pull

• Pull logs $ adb logcat• Attach jdb $ adb jdwp:<process>• Start remote shell $ adb shell

Run shell commands. Use at own risk

sqlite3• Access through adb remote shell• Run SQL commands on SQLite databases• Similar to MySQL or Oracle SQL*Plus• Example:

Dalvik Debug Monitor Service (ddms)

• Screen capture• Thread and heap information• Logcat• System info• Call and location data spoofing• Launch Traceview from ddms

Dalvik Debug Monitor Service (ddms)

Dalvik Debug Monitor Service (ddms)

• Threads of a selected process

Dalvik Debug Monitor Service (ddms)

• Heap of a selected process

Dalvik Debug Monitor Service (ddms)

• Logcat with save-to-file

Dalvik Debug Monitor Service (ddms)

• System info

Dalvik Debug Monitor Service (ddms)

• Call and location data spoofing-> Run simulations for emulator

Traceview

• Launch from ddms

Traceview• Record method invocations over a selected time period. For each method:

- Percentage of time used- Number of calls- Average time / call

• Drill down:- Show parent callers- Show children called- Magnify time scale

Traceview

Traceview

Traceview

• Insert expensive code, in drawStop():

Traceview

Emulator (focus on dev tools)

• Emulator development tools are provided in a separate app, DevTools

• Variety of functions, such as show processes, CPU utilization on screen (you’re probably better off using ddms)

• Most useful component: Show screen updates

The End

Discussion…