What does this have to do with Cordova? It looks like you're building your own bridge on Android.
Make sure that your Java version that you're building with supports annotations. If not, you won't be able to add the Javascript Interface. On Wed, Sep 11, 2013 at 4:52 PM, dev at watch2web.com <[email protected]> wrote: > I recently changed the value of targetSdkVersion in my AndroidManifest.xml > from 16 to 18. They say, "Better late than never," but maybe not in this > case. I discovered that the change causes my app to white-screen on startup > on two Samsung Galaxy S4s -- both running API level 17 (4.2.2). (On the five > other devices I have -- all running API 16 or lower -- everything still works > as if nothing has changed.) If I set targetSdkVersion back to 16, the app > works great on all devices, including both Samsungs. I am using Cordova 3.0.0. > > I have traced the problem to my onDeviceReady function, at the line where it > first tries to execute one of my @JavascriptInterface functions. (It doesn't > seem to matter which one.) Code snippet looks like: > > (in main Activity) > > appView.addJavascriptInterface(this, "MyJSI"); > > @JavascriptInterface > public void foo() { .... } > > > (in onDeviceReady) > > if (window.MyJSI == undefined) console.log("javascript interface is > undefined"); > else if (window.MyJSI == null) console.log("javascript interface is null"); > else if (typeof(window.MyJSI) == 'object') console.log("javascript interface > is an object: " + window.MyJSI); > else console.log("javascript interface is not an object"); > > window.MyJSI.foo(); // foo is just some method I wrote -- I've only > experimented with a few > > > On both "good" (API level <= 16) and "bad" (Galaxy S4, API level >= 17) > phones I get in the console output: > >>> javascript interface is an object: [object Object] > > On the "good" phones, everything continues, and I get all the logging that > comes from subsequent parts of the app. On the "bad" phone, I get: > >>> Uncaught TypeError: Object [object Object] has no method 'foo' > > and things pretty much stop. > > > You'd think I was in OK shape. I have a fix that involves changing one > character -- not even in code, just a settings file -- and it works on all > API levels. But NO, Google Play forbids lowering the targetSdkVersion. So I > need to fix this for real. > > In searching, I found this issue from December. It isn't exactly what I'm > seeing since deviceready does fire for me. But a lot of the elements seem > very similar. > > https://issues.apache.org/jira/browse/CB-1879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13501660#comment-13501660 > > > I'm happy to dig through Java source myself if it will help, but if so, I > could use a little guidance getting started. > > Thanks, > Andrew
