The application has stopped unexpectedly How to Debug

Question

Please note  unlike many other questions having the subject title  application has stopped unexpectedly   I am not asking for troubleshooting a particular problem   Rather  I am asking for an outline of the best strategy for an Android Eclipse Java rookie to tackle this formidable task of digesting huge amounts of information in order to develop  and debug   a simple Android application   In my case  I took the sample skeleton app from the SDK  modified it slightly and what did I get the moment I try to run it      The application     process com example android skeletonapp    has stopped unexpectedly  Please try   again    OK  so I know that I have to look LogCat  It s full of timestamped lines staring at me    What do I do now  What do I need to look for   Is there a way to single-step the program  to find the statement that makes the app crash   I thought Java programs never crash  but apparently I was mistaken   How do I place a breakpoint   Can you recommend an Android debug tutorial online  other than this one

User · Answer

If you use the Logcat display inside the 'debug' perspective in Eclipse the lines are colour-coded. It's pretty easy to find what made your app crash because it's usually in red.

The Java (or Dalvik) virtual machine should never crash, but if your program throws an exception and does not catch it the VM will terminate your program, which is the 'crash' you are seeing.

User · Answer

I m an Eclipse Android beginner as well  but hopefully my simple debugging process can help     You set breakpoints in Eclipse by right-clicking next to the line you want to break at and selecting  Toggle Breakpoint   From there you ll want to select  Debug  rather than the standard  Run   which will allow you to step through and so on  Use the filters provided by LogCat  referenced in your tutorial  so you can target the messages you want rather than wading through all the output  That will  hopefully  go a long way in helping you make sense of your errors    As for other good tutorials  I was searching around for a few myself  but didn t manage to find any gems yet

User · Answer

From the Home screen  press the Menu key  List item Touch Settings  Touch Applications  Touch Manage Applications  Touch All  Select the application that is having issues  Touch Clear data and Clear cache if they are available  This resets the app as if it was new  and may delete personal data stored in the app

User · Answer

Filter your log to just Error and look for FATAL EXCEPTION

User · Answer

Check whether your app has the needed permissions I was also getting the same error and I checked the logcat debug log which showed this   04-15 13 38 25 387  E AndroidRuntime 694   java lang SecurityException  Permission Denial  starting Intent   act android intent action CALL dat tel 555-555-5555 cmp com android phone  OutgoingCallBroadcaster   from ProcessRecord 44068640 694 rahulserver test 10055   pid 694  uid 10055  requires android permission CALL PHONE   I then gave the needed permission in my android-manifest which worked for me

[android] The application has stopped unexpectedly: How to Debug?

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