Error Calling Method On Npobject Android
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Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads error calling method on npobject javascript with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, error calling method on npobject firefox just like you, helping each other. Join them; it only takes a minute: Sign up Javascript Interface, error “Uncaught Error: Error calling method on NPObject” up vote 3 down vote favorite 1 In my Android application, I am using the WebAppInterface to bridge from Javascript to Java. My .html file includes some JS that runs
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"Android.canPlay();" at certain times. In my app, the function "canPlay()" fires a variable listener. When the variable listener fires, if conditions are met, some files are renamed (temporary files, that were downloaded with a .tmp additional extension, including the .html file (so it is .html.tmp, with the original .html existing alongside it)) After the renaming happens, the Web View is reloaded (I have tried using both a function and just ".loadUrl()" - both give errors) When time comes to reload the html file in the webview, I get the error: E/Web Consoleļ¹ Uncaught Error: Error calling method on NPObject. at file:////mnt/sdcard/Download/qwerty/playlists/29/2/index.html:206 Line 206 is the "Android.canPlay()" call. Things to note - If I don't rename the files before reloading the webview and instead, rename then from a background service that runs, I don't have this error (although I do get one about running stuff on the WebViewCoreThread) Some code: WebAppInterface public class WebAppInterface { final Context mContext; WebAppInterface(Context c) { mContext = c; } @Jav
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us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, http://stackoverflow.com/questions/20976487/javascript-interface-error-uncaught-error-error-calling-method-on-npobject just like you, helping each other. Join them; it only takes a minute: Sign up Error calling method on NPObject! in Android 2.2 up vote 11 down vote favorite 1 I'm using addJavascriptInterface within my Android application to allow JavaScript to invoke functions I've created in my native Java application. This worked well in Android 2.1, http://stackoverflow.com/questions/3344256/error-calling-method-on-npobject-in-android-2-2 however in Android 2.2 I receive the error message "Error calling method on NPObject!" When I instrument the method call the internals of the native method are getting called, however the exception is being throw in JavaScript. android android-webview share|improve this question asked Jul 27 '10 at 13:44 Kevin 4,136113647 I'm having the same issue. Did you managed to solve it? –grzaks Jul 25 '11 at 9:37 add a comment| 6 Answers 6 active oldest votes up vote 11 down vote I was getting this exact error: Uncaught Error: Error calling method on NPObject! Turns out I was attempting to invoke a JavascriptInterface function from a webview like so: AndroidJS.populateField(field); and on the Java side, the function didn't accept a parameter: public void populateField() {} Simply allowing the Java function to accept a parameter solved this error for me. E.g., public void populateField(String field) {} This may not be, and probably is not, the only reason this error could be thrown. This is sim
side, the function didn't accept a parameter: public void populateField() {} Simply allowing the Java function to accept a parameter solved this error for me. public void populateField(String field) {} This may not be, and probably https://recalll.co/app/?q=Error%20calling%20method%20on%20NPObject!%20in%20Android%202.2%20-%20Stack%20Overflow is not, the only reason this error could be thrown. This is simply how I resolved my specific scenario. Hope this helps! :) Error calling method on NPObject! in Android 2.2 - Stack Overflow https://github.com/phonegap-build/PushPlugin/issues/92 View More at http://stackoverflow.com/questions/3344256/error-calling-method-o... Here's a twist I found on this problem that could be useful for some of the folks running into this problem (and it likely explains intermittent failures that seem to defy error calling explanation)... If any exceptions are thrown (and not caught) in the return handler code prior to allowing the javascript interface callback to return clean, it will propagate back as a failed call and you will also get this error - and it would have nothing to do with missing functions or parameters. The easiest way to find this case (whether or not you use this in your final implementation) error calling method is to push whatever handler code you have back onto the UI thread (the callback will not be on the UI thread) - this will allow the callback to return clean and any subsequent exceptions that occur will propagate properly up until you catch them or until the app crashes. Either way you will see exactly what is really happening. Otherwise the uncaught exception passes back to javascript where it will not be handled or reported in any way (unless you specifically built error trapping code into the JS you were executing). ok, sound great but how exactly can we do that? how can we push handler code on the ui thread? Error calling method on NPObject! in Android 2.2 - Stack Overflow View More at http://stackoverflow.com/questions/3344256/error-calling-method-o... In my experience this problem is caused by Javascript interfaces bringing back objects that Javascript doesn't automatically identify. In Android this is caused by wrappers like Boolean or Long in comparison to their native versions boolean and long. //This will fail public Long getmyLongVal() { return 123456789; } //This will work public long getMyNativeLongVal() { return 123456789; } So remove your wrapper classes to any methods being used by Javascript if you want to avoid NPObject errors. E
Sign in Pricing Blog Support Search GitHub This repository Watch 119 Star 1,394 Fork 1,336 phonegap-build/PushPlugin forked from bobeast/PushPlugin-deprecated Code Issues 371 Pull requests 69 Projects 0 Pulse Graphs New issue Error calling method on NPObject. at file:///android_asset/www/cordova.js:929 #92 Closed kuczek opened this Issue Oct 16, 2013 · 7 comments Projects None yet Labels None yet Milestone No milestone Assignees No one assigned 8 participants kuczek commented Oct 16, 2013 Cordova 3.1, it's caused by sendJavascript function from gWebView. Whatever I put in gWebView.sendJavascript i tried 'javascript: alert("x")', and 'alert("x")' thre result is always the same. kuczek commented Oct 16, 2013 I just used gWebView.loadUrl instead of sendJavascript and it's working, but i think it's not good solution. CWSpear commented Oct 22, 2013 I'm getting this a ton trying to download a file, and it's messing with some stuff pretty dirty. Trying to track it down, but I think it's related to a callback for downloading progress. But it's this exact error, on the same line of Cordova.js. I'm also on 3.1. I am using the PushPlugin, but I don't know that the error is necessarily originating from there...? fsautomata commented Oct 31, 2013 Just ran in the same issue. cordova 3.1 and Android 4.3 on Nexus 4. Solved it with loadUrl (Thanks!) but I would love for the issue to be fixed in the plugin. davidrabinowitz commented Nov 18, 2013 Had a similar issue with another plugin - was with cordova 3.1.0. The problem was that project was created with cordova 3.0.0 and the 3.0.0 jar was in the android app. Once I ran "cordova platform update android" to update the jar to 3.1.0 the problem was solved. cedricrey commented Nov 19, 2013 Oh David, you make my day ! Thank you, 3 hours searching without any result. Thanks a lot. bobeast closed this Nov 23, 2013 Khaleela-visolve commented Jul 13, 2015 Hi, I am using Cordova 5.1.1, i found the same issue .... printoa commented Jul 13, 2015 I am using Cordova 5.1.1, i found the same issue ....And my error is, error uncaught Error: Method not found in file://android_asset/www/cordova.js at line 943. I updated the cordova-lib and updated android platform and also the plugins... Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. Terms Privacy Security Status Help You can't perform that action at this time. You signed in with another tab o