Tony Homer created CB-11292:
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Summary: calling loadUrl more than once breaks messageChannel
Key: CB-11292
URL: https://issues.apache.org/jira/browse/CB-11292
Project: Apache Cordova
Issue Type: Bug
Components: Android
Reporter: Tony Homer
CordovaWebViewImpl.sendJavascriptEvent caches a reference to the CoreAndroid
plugin instance. This plugin manages Cordova's messageChannel. One of the
things messageChannel is used for is sending system events from native to JS,
for example backbutton events.
By default, CordovaWebViewImpl.loadUrl unloads all plugins. This has the side
effect of rendering CordovaWebViewImpl's cached instance of CoreAndroid stale.
That is, a new instance is created and bound to a new messageChannel callback.
After this happens, when CordovaWebViewImpl sends messages to JS, the callback
id has changed and the messages are not handled.
There are at least 2 approaches that should fix this.
1. (tested) do not cache the CoreAndroid instance. If
CordovaWebViewImpl.sendJavascriptEvent gets the reference from PluginManager
every time, it will not become stale.
2. (not tested, but better encapsulated) when plugins are recreated, clear the
cached reference
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