JavaScript on Android randomly stops working

Posted by AndersWid on Stack Overflow See other posts from Stack Overflow or by AndersWid
Published on 2010-05-03T16:38:38Z Indexed on 2010/05/03 22:18 UTC
Read the original article Hit count: 275

Filed under:

android

|

webview

|

JavaScript

|

debugging

Hi!

I have an application that uses a WebView and a html-page with javascript functions. Randomly the JavaScript functions doesn't seem to be called. It works up to a random point (I have looked at this bug all day) can only be produced on hardware (HTC Legend) not on emulator.

Basicly I'm using callback to javaScript whenever the user presses a button, these callbacks tell the html to redraw using javaScript functions.

mHandler.post(new Runnable() { public void run() { mWebView.loadUrl("javascript:getDataLine()"); } });

The first line in this javaScript code is an alert that says that it has started, so that I can see that it's working.

Settings alerts or console.log's everywhere won't help as it seems the problem is in the webview or in Android itself. I need a way to see what's going on in the background. Maybe see if a previous call failed and stalled the thread or something.

© Stack Overflow or respective owner

Related posts about android

Please verify my layout: bottom button keeps coming up over keyboard

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everyone, I have a layout which does almost what I want. There's just one bug regarding the button at the bottom. I should stay at the bottom at all times. But whenever I bring up the soft-keyboard the button will be displayed above the keyboard. This is not what I want but it should become covered… >>> More
Android programming. Application stopped unexpectedly.

as seen on Stack Overflow - Search for 'Stack Overflow'
I've just created a prototype of interface for my android app and tried to run it. Unfortunately I get an error that my app has stopped unexpectedly (my reputation doesn't allow me to post images so follow my links): screenshot of error message This is layout mode of editing. Everything looks as… >>> More
Listview Row Overlap Problem

as seen on Stack Overflow - Search for 'Stack Overflow'
I just updated my app and I am getting some odd complaints from people who update it. I am only getting complaints from people with non-stock android phones (phones that manufacturers have modified...HTC phones, cliq, pulse, etc), other phones like the Droid, Nexus work fine. My app (Photo Frame Deluxe)… >>> More
Why are some of my view not aligned correctly at the bottom of my relative layout?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have problems getting some of my views aligned in a relative layout that I use inside a row of my listview. Here is a screenshot from the layout builder in Eclipse, this is what I think it should look like: The next image is from the emulator. Now the TestTestTest View is at the top and covers… >>> More
Android RatingBar weirdness: Whenever I add a RatingBar to my layout, a bunch of the generated tags,

as seen on Stack Overflow - Search for 'Stack Overflow'
Whenever I use a RatingBar view in my layout, I suddenly get all kinds of compile errors. I'm using Android 2.0, but I've also tried 2.0.1, and 2.1, without joy. I also get a message: Shader 'android.graphics.BitmapShader' is not supported in Layout Editor, and an odd warning which may or maynot be… >>> More

Related posts about webview

"Hello, WebView" tutorial opens the requested address in Android browser and not in my webview

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everyone, I am using Android emulator with AVD of Android 2.1 and I have the following problem: Trying to load a URL in a WebView using webView.loadUrl causes it to open in the browser instead. Note: I am talking about the initial opening, not the issue in which links from the WebView open in… >>> More
NullPointerException in webview.java (android.webkit.WebView$PrivateHandler.handleMessage)

as seen on Stack Overflow - Search for 'Stack Overflow'
Every few days I get a crash report for my application with the following stack trace, or small variants thereof (with different line numbers based on different android versions) java.lang.NullPointerException at WebView.java:8241:in `android.webkit.WebView$PrivateHandler.handleMessage' Handler.java:99:in… >>> More
Android webview doesn't playing mp4 video in same page

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to show one local html file contains code for playing video and try to show that html file in android webview. I've used following code to for playing video: WebViewLoadVideoActivity.java //DECLARE webview variable outside of onCreate function so we can access it in other functions… >>> More
Formatting webView content

as seen on Stack Overflow - Search for 'Stack Overflow'
I am getting some HTML text from a remote server which I am displaying inside a WebView. I need to format the text display and set a font size and color for the WebView. The only way I can think of is: pre-pending the HTML string received with a tag and specify the font information there. What… >>> More
How load WebView with another URL when navigated through tab bar viewController

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I have created window based application, root controller as Tab bar controller. WebView is being loaded in Tab bar interfaced ViewController's View.WebView is created using IB.WebView object declared in ViewController as per below. //ViewController.h @interface ViewController:UIViewController{ IBOutlet… >>> More