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Posted to issues@cordova.apache.org by GitBox <gi...@apache.org> on 2020/06/19 08:37:14 UTC
[GitHub] [cordova-android] secondVISION opened a new issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
secondVISION opened a new issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002
# Bug Report
## Problem
### What is expected to happen?
Cordova should silently exit.
### What does actually happen?
Cordova crashes because the parent Activity is not alive anymore
## Information
<!-- Include all relevant information that might help understand and reproduce the problem -->
Start a CordovaWebview and load a slow/large website.
`cordovaWebView.loadUrl(url)`
If you return to the previous activity (by using the (hardware) back button), cordova will try to execute `cordova.getActivity().runOnUiThread()`, but the activity is no longer there.
e.g., https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaWebViewImpl.java#L187
Stacktrace:
```
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
at org.apache.cordova.CordovaWebViewImpl$2.run(CordovaWebViewImpl.java:179)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:764)
```
### Command or Code
<!-- What command or code is needed to reproduce the problem? -->
See information above on how to reproduce.
### Environment, Platform, Device
<!-- In what environment, on what platform or on which device are you experiencing the issue? -->
Android / All devices / All OS
### Version information
<!--
What are relevant versions you are using?
For example:
Cordova: Cordova CLI, Cordova Platforms, Cordova Plugins
Other Frameworks: Ionic Framework and CLI version
Operating System, Android Studio, Xcode etc.
-->
Android Studio
Cordova 8.1.0
## Checklist
<!-- Please check the boxes by putting an x in the [ ] like so: [x] -->
- [X ] I searched for existing GitHub issues:
- Found issue: https://github.com/apache/cordova-android/issues/884 but this was closed due to lack of information
- [X] I updated all Cordova tooling to most recent version:
- Crash occured on
'org.apache.cordova:cordova:6.2.3'
Updated to (crashed as well):
'org.apache.cordova:framework:8.1.0'
- [X ] I included all the necessary information above
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[GitHub] [cordova-android] jaeheonshim commented on issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
jaeheonshim commented on issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002#issuecomment-650451238
You should be able to replicate the problem by enabling the "Don't keep activities" option in Android Developer Options (Developer options => Apps => Don't keep activities (Destroy every activity as soon as the user leaves it.)
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[GitHub] [cordova-android] jcesarmobile commented on issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
jcesarmobile commented on issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002#issuecomment-648767171
can you provide a sample app?
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[GitHub] [cordova-android] jaeheonshim edited a comment on issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
jaeheonshim edited a comment on issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002#issuecomment-650451238
You should be able to replicate the problem by enabling the "Don't keep activities" option in Android Developer Options (Developer options => Apps => Don't keep activities (Destroy every activity as soon as the user leaves it.))
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[GitHub] [cordova-android] breautek commented on issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
breautek commented on issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002#issuecomment-650467372
When doing that on the android simulator, I run into a different crash stacktrace
```
D/CordovaActivity: Paused the activity.
D/CordovaActivity: Stopped the activity.
D/CordovaActivity: CordovaActivity.onDestroy()
D/CordovaWebViewImpl: >>> loadUrl(about:blank)
W/cr_AwContents: WebView.destroy() called while WebView is still attached to window.
W/cr_AwContents: Application attempted to call on a destroyed WebView
java.lang.Throwable
at org.chromium.android_webview.AwContents.t(chromium-TrichromeWebViewGoogle.apk-stable-410404481:2)
at Mt.loadingStateChanged(chromium-TrichromeWebViewGoogle.apk-stable-410404481:2)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:335)
at android.os.Looper.loop(Looper.java:183)
at android.app.ActivityThread.main(ActivityThread.java:7523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:941)
E/chromium: [ERROR:aw_browser_terminator.cc(125)] Renderer process (5916) crash detected (code -1).
```
Maybe this depends on the API level of the device and/or the installed chrome version though. It kinda seems related.
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[GitHub] [cordova-android] secondVISION commented on issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
secondVISION commented on issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002#issuecomment-659976191
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[GitHub] [cordova-android] secondVISION commented on issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
secondVISION commented on issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002#issuecomment-659912485
Created a sample app: https://github.com/secondVISION/cordova-android-crash
How to reproduce:
- Click on "Start Cordova"
- Immediately press the Back key
- Wait on crash. Cordova will try to load the website in an activity which has already been destroyed.
- Waiting can take up to 30 seconds I've noticed
Crash log:
```
2020-07-16 14:06:20.618 19256-19392/com.example.cordovacrash D/EGL_emulation: eglMakeCurrent: 0x8c152aa0: ver 3 0 (tinfo 0x8859b8c0)
2020-07-16 14:06:39.652 19256-19383/com.example.cordovacrash E/AndroidRuntime: FATAL EXCEPTION: pool-2-thread-1
Process: com.example.cordovacrash, PID: 19256
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
at org.apache.cordova.CordovaWebViewImpl$2.run(CordovaWebViewImpl.java:181)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
2020-07-16 14:06:39.819 19256-19310/com.example.cordovacrash D/EGL_emulation: eglMakeCurrent: 0xa1305300: ver 3 0 (tinfo 0xa13031f0)
```
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[GitHub] [cordova-android] breautek closed issue #1002: NullPointerException: 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
Posted by GitBox <gi...@apache.org>.
breautek closed issue #1002:
URL: https://github.com/apache/cordova-android/issues/1002
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