Debugging Android applications involves using ADB commands from the command line, setting breakpoints and viewing logs in Android Studio, and monitoring threads, variables, and devices using the Android Device Monitor. Key debugging techniques include using logcat to view system messages, setting breakpoints to pause at certain points, and using the debugger to inspect thread states, call stacks, and variable values.

1. Debug Android

2. Debugging
● ADB command
● Debugging on Android Studio
○ System Log
○ Setting Breakpoint
○ Android Device Monitor

3. ADB(Android Debug Bridge)
● Versatile command line tool that lets you
communicate with an emulator instance or connected
Android-powered device.
● Also provides a Unix shell that you can use to run a
variety of commands on an emulator or connected
device
● http://developer.android.com/tools/help/adb.html

4. System Log
● 'Logcat' dumps a log of system messages
○ stack traces when throws an error
○ messages that you have written on app
● Use android.util.Log(String Tag, String msg) for input
message

5. Breakpoint
● Set breakpoint to debug on certain position
● Needs to run on ‘Debug’ mode

6. Breakpoint

7. Debugger
● With debugger, user can review
○ thread state
○ call stack
○ current values of variable

8. Android Device Monitor
● Stand-alone tool that
provides a graphical
user interface for
several Android
application debugging
and analysis tools.