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https://issues.apache.org/jira/browse/CB-6033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906121#comment-13906121
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Joe Bowser commented on CB-6033:
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OK, this sucks! There's not much we can do since it seems that the app's local
data is wiped on the update. The file is stored in the same location on KitKat
as it is on earlier versions of Android. I don't think there's an easy way to
get around this issue than to back up the device storage somehow.
> Android 4.4 update loses LocalStorage data
> ------------------------------------------
>
> Key: CB-6033
> URL: https://issues.apache.org/jira/browse/CB-6033
> Project: Apache Cordova
> Issue Type: Bug
> Components: Android
> Reporter: Darryl Pogue
> Assignee: Joe Bowser
>
> This appears to be a result of the switch from old WebView to the new
> Chrome-powered WebView.
> If an app is installed in 4.3 and saves data to LocalStorage (and possibly to
> WebSQL) and then the device is updated to 4.4, that data appears to be lost.
> Some threads regarding the problem:
> http://www.sencha.com/forum/showthread.php?278158-localStorage-cleared-when-upgrading-to-KitKat-(Android-4.4)
> https://groups.google.com/forum/#!msg/phonegap/rNizMKW5GaA/g1XBBco2otMJ
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