[android-developers] finish() at onStop causes ANR

2010-07-29 Thread James Wang 
We have two apks A and B.
A starts B at onBackPressed.

Doing as steps below can make ANR:
1)starts emulator and A;
2)put one finger on A and hold on it;
3)press ESC to do back key action and B is started;
4)release finger on B

ANR will happens if we call finish() at onStop. And if we call
finish() after startActivity and everything is all right.

Below is log when ANR happens:
07-28 07:08:31.586 V/WindowManager(   52): Waiting for key dispatch:
5000

07-28 07:08:36.591 V/WindowManager(   52): Finished waiting @5174450
startTime=5169441 switchTime=0 target=Window{43e68d70
com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.First paused=true} mLW=null mLB=null
fin=true mCurrentFocus=Window{43ce5d28
com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.Second paused=false}

07-28 07:08:36.591 W/WindowManager(   52): Key dispatching timed out
sending to com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.First

07-28 07:08:36.614 W/WindowManager(   52): Dispatch state:
{{KeyEvent{action=1 code=4 repeat=0 meta=0 scancode=158 mFlags=8} to
Window{43ce5d28 com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.Second paused=false} @ 1280300903391
lw=Window{43ce5d28 com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.Second paused=false}
lb=android.os.binderpr...@43e6ed18 fin=false gfw=true ed=true tts=0
wf=false fp=false mcf=Window{43ce5d28
com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.Second paused=false}}}

07-28 07:08:36.614 W/WindowManager(   52): Current state:  {{null to
Window{43e68d70 com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.First paused=true} @ 1280300916617
lw=null lb=null fin=true gfw=true ed=true tts=0 wf=false fp=true
mcf=Window{43ce5d28 com.neusoft.test.FakeFinishOnStop/
com.neusoft.test.FakeFinishOnStop.Second paused=false}}}

07-28 07:08:36.632 I/ActivityManager(   52): ANR in process:
com.neusoft.test.FakeFinishOnStop (last in
com.neusoft.test.FakeFinishOnStop)

Is this a bug?

James

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Re: [android-developers] finish() at onStop causes ANR

2010-07-29 Thread TreKing 
On Thu, Jul 29, 2010 at 10:09 AM, James Wang jameswangc...@gmail.comwrote:

 A starts B at onBackPressed.

 ANR will happens if we call finish() at onStop.


You're starting an activity in response to the button that's supposed to
kill activities?
And you're calling finish() in a life cycle method that's usually part of
the destroy process anyway?

Why? Why would do this?

Is this a bug?


Probably, but with your code, not Android.

-
TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] finish() at onStop causes ANR

2010-07-29 Thread Dianne Hackborn 
adb shell cat /data/anr/traces.txt

That contains the stack crawls of the last ANR.

On Thu, Jul 29, 2010 at 8:09 AM, James Wang jameswangc...@gmail.com wrote:

 We have two apks A and B.
 A starts B at onBackPressed.

 Doing as steps below can make ANR:
 1)starts emulator and A;
 2)put one finger on A and hold on it;
 3)press ESC to do back key action and B is started;
 4)release finger on B

 ANR will happens if we call finish() at onStop. And if we call
 finish() after startActivity and everything is all right.

 Below is log when ANR happens:
 07-28 07:08:31.586 V/WindowManager(   52): Waiting for key dispatch:
 5000

 07-28 07:08:36.591 V/WindowManager(   52): Finished waiting @5174450
 startTime=5169441 switchTime=0 target=Window{43e68d70
 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.First paused=true} mLW=null mLB=null
 fin=true mCurrentFocus=Window{43ce5d28
 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.Second paused=false}

 07-28 07:08:36.591 W/WindowManager(   52): Key dispatching timed out
 sending to com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.First

 07-28 07:08:36.614 W/WindowManager(   52): Dispatch state:
 {{KeyEvent{action=1 code=4 repeat=0 meta=0 scancode=158 mFlags=8} to
 Window{43ce5d28 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.Second paused=false} @ 1280300903391
 lw=Window{43ce5d28 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.Second paused=false}
 lb=android.os.binderpr...@43e6ed18 fin=false gfw=true ed=true tts=0
 wf=false fp=false mcf=Window{43ce5d28
 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.Second paused=false}}}

 07-28 07:08:36.614 W/WindowManager(   52): Current state:  {{null to
 Window{43e68d70 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.First paused=true} @ 1280300916617
 lw=null lb=null fin=true gfw=true ed=true tts=0 wf=false fp=true
 mcf=Window{43ce5d28 com.neusoft.test.FakeFinishOnStop/
 com.neusoft.test.FakeFinishOnStop.Second paused=false}}}

 07-28 07:08:36.632 I/ActivityManager(   52): ANR in process:
 com.neusoft.test.FakeFinishOnStop (last in
 com.neusoft.test.FakeFinishOnStop)

 Is this a bug?

 James

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-- 
Dianne Hackborn
Android framework engineer
hack...@android.com

Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails.  All such
questions should be posted on public forums, where I and others can see and
answer them.

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