Npobject Error Android
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Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Sometimes throws Uncaught Error: Error calling method on NPObject on Android up vote 20 down vote favorite 10 I am
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having problems with the Webview in Android and it's JavascriptInterfaces. I am passing a string to the JavascriptInterface. When debugging it, I receive the correct string within my Android application. The problem: Sometimes I get an Uncaught Error: Error calling method on NPObject. Does anybody know why? The Interface in Java: public class JSInterfaceGame extends JSInterface { @JavascriptInterface public void setShareText(String share){ shareText = share; if(mJSInterfaceListener != null) mJSInterfaceListener.onParametersChanged(SHARE_TEXT); } The initialization in the onCreateView-Method within the Fragment: online = (WebView) rootView.findViewById(R.id.online); online.setWebViewClient(new WISWebviewClient() { @Override public void onStatusChanged(final WebView view, int progress, long duration) { //unrelated } }); WebSettings ws = online.getSettings(); ws.setJavaScriptEnabled(true); ws.setUserAgentString(USER_AGENT); ws.setCacheMode(WebSettings.LOAD_DEFAULT); ws.setRenderPriority(WebSettings.RenderPriority.HIGH); SharedPreferences settings = getActivity().getSharedPreferences(GameActivity.PREFERENCES, Context.MODE_PRIVATE); mJSInterface = new JSInterfaceGame(); mJSInterface.setJSInterfaceListener(this); // Defined elsewhere in this class. mJSInterface.setPlayerName(settings.getString(GameActivity.PREFS_PlAYERNAME, null)); online.addJavascriptInterface(mJSInterface, "JSInterface"); online.loadUrl("http://myurl.something"); Call in Javascript: function makeShareText() { var text = "Some text"; console.log(typeof text); // Always a
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site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community http://stackoverflow.com/questions/16758397/sometimes-throws-uncaught-error-error-calling-method-on-npobject-on-android of 6.2 million programmers, 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 http://stackoverflow.com/questions/20976487/javascript-interface-error-uncaught-error-error-calling-method-on-npobject file includes some JS that runs "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 Console﹕ 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 WebAppIn
68948: "Error calling method on NPObject!" this error is UNDEBUGGABLE 5 people starred this issue and may be notified of changes. Back to list Status: Obsolete Owner: ---- https://code.google.com/p/android/issues/detail?id=68948 Closed: May 2015 Type-Defect Priority-Medium ReportedBy-Developer Sign in to add a comment Reported by matteosi...@gmail.com, Apr 24, 2014 When you have: - a webview - a JavascriptInterface - you call a http://xhrwang.me/2014/09/25/interaction-between-java-and-js-in-android.html Java method from JavaScript through a JavascriptInterface - an error occurs in Java code then you get this exception in JavaScript, and only in JavaScript: "Error calling method on NPObject!" This error message does error calling not give even the tenth part of the information you expect from any error message in order to debug. It doesn't even make sense (except to the person who wrote it, I guess) The exception in this situation should contain exactly as much information as any exception that is thrown in any other situation not involving javascript nor a webview. Also, the exception should be logged whether or error calling method not you log it from JavaScript, and with a complete backtrace. Oct 9, 2014 #1 timru...@gmail.com All I did was upgrade from Cordova 3.5.0 to 3.6.3 and this message stops my app dead Oct 11, 2014 #2 nand...@fdes.in The same problem here, Upgrades from 3.5.0 to 3.6.3 and i am just seeing this message Oct 11, 2014 #3 timru...@gmail.com For my specific problem of upgrading, it's because my brain was turned off and I did not copy the new cordova.js (and other plugin js files) from my launcher project into the js app that's loaded in the WebView. I had even created an Ant manual step in build for that purpose. Folks remember, duplicate code is a real problem wherever it occurs Sent from my BlackBerry 10 smartphone on the Bell network. Original Message From: android@googlecode.com Sent: Saturday, October 11, 2014 5:01 AM To: timrudy0@gmail.com Reply To: android@googlecode.com Subject: Re: Issue 68948 in android: "Error calling method on NPObject!" this error is UNDEBUGGABLE May 10, 2015 Project Member #4 e...@google.com (No comment was entered for this change.) Status: Obsolete May 20, 2015 #5 matteosi...@gmail.com When you close webview issues here as obsolete, do you co
系统提供的 WebView 控件,便于深度定制和更灵活的功能设计。而其中一些 App 是基于 WebView 的,而这种情况下经常会用到 Java 代码和 Javascript 代码的交互。 这篇文章用一个应用程序来演示如果在使用 WebView 的时候进行 Java 和 Javascript 之间的交互。 新建一个 Activity,其 layout 配置如下: