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https://issues.apache.org/jira/browse/CB-8804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14595585#comment-14595585
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ASF GitHub Bot commented on CB-8804:
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Github user thehuijb commented on the pull request:
https://github.com/apache/cordova-plugin-camera/pull/97#issuecomment-114052451
## How a cordova camera application works on android
This is basically how a cordova application works:
- User presses App-icon
- Applications start
- Mainactivity start
- Java side of plugins included
- WebView initialized
- Html loads
- javascript side of plugins loaded
- onDeviceReady fired
Now we have our application up and running.
It’s time to take a picture
- We call getPicture
- The call goes to the CordovaBridge
- CordovaBridge uses the PluginManager to pass it to the camera Plugin
- Camera plugin launches a camera Activity
Now that a camera Activity is running, our MainActivity is pushed to the
background, onPause is fired.
When the Camera Activity finished the MainActivity is called again via
onActivityResult
the result is dispatched to the javascript succesFunction where our
application can then do with it as planned.
That’s what happens in a high memory availability scenario, a happy flow.
Now what happens when there isn’t enough memory left and the OS decides to
kill our MainActivity?
- CameraActivity is finished and sends its result back to the activity that
launched it.
- Our MainActivity, is started.
- Java side of plugins included
- onActivityResult fires
- plugin fails to send result back to the javascript because it is not
there anymore
- a completely new WebView is initialized
- Html loads
- javascript side of plugins loaded
- onDeviceReady fired
the precise order of event could differ on occasion but that doesn’t matter
because the entire webview has to be rebuilt and with it all the javascript
therefor the callback can never be completed in this situation.
You will always have to call a method in (or after) onDeviceReady to solve
this problem.
Serge
> https://github.com/apache/cordova-plugin-camera#android-quirks
> --------------------------------------------------------------
>
> Key: CB-8804
> URL: https://issues.apache.org/jira/browse/CB-8804
> Project: Apache Cordova
> Issue Type: Improvement
> Components: Plugin Camera
> Environment: Android
> Reporter: Serge Huijben
>
> Android Quirks
> Android uses intents to launch the camera activity on the device to capture
> images, and on phones with low memory, the Cordova activity may be killed. In
> this scenario, the image may not appear when the Cordova activity is restored.
> It can be solved bij implementing this PR:
> https://github.com/apache/cordova-plugin-camera/pull/97
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