Android :: Can't Load Image In WebView Via Javascript

Jun 3, 2010

My app uses a WebView widget to load ads from Google AdManager. AdManager gives you an HTML snippet, which is 90% javascript to call their server for the image to load.

I put their html snippet into a string and use String.format to add in several variables that AdManager requires.

I enable javascript on the WebView (webView.getSettings().setJavaScriptEnabled(true);)

I load the string into the WebView (webView.loadData(myString, "text/html", "UTF-8");

result: the ad never loads (although the WebViewClient shows serveral .js resources loading).

If I take that exact string and create a file and then use webView.loadUrl("file:///android_asset/test.html"), the image loads properly.

Why would loadUrl work but loadData does not?

I've verified that javascript is running. I injected a little script to write out a text string and it works.

Android :: Can't Load Image in WebView via Javascript


Android :: Image Included Javascript Not Appear In WebView

Jan 3, 2010

I used webView to show javaScript,one image was included in the javaScrip,but the webView not run the image on the contrary appear a "?"image.

My code:

CODE:..............

I put android_normal.png and android_waving.png in the assets and drawable folder

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Android :: WebView And Javascript

Sep 14, 2009

I have a WebView in my activity opening html file, containing a simple javascript. My problem is that the webview opens the html file, but doesn't execute the javascript. When i open the file from web browser, and not from my app, it executes the javascript correctly. What could be the difference? Are there any different settings for running javascript?

Here is my file:

CODE:.......

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Android :: JavaScript Problem In Webview

Apr 12, 2010

I have a JavaScript function which returns a value and i want to use that value in my Android program.

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Android :: Webview Javascript Injection

Sep 17, 2010

I'd like to call a JavaScript function out of Java.

Well, the following source code works fine for me (http:// whyandroid.com/android/206-using-webviews.html):

This is not called on the UI thread. Post a runnable to invoke

CODE:............

My problem now is to use a parameter for the JavaScript function.

Let's assume I've got some XML (just like AJAX somehow).

I need to escape it just like the iPhone / Objective-C command stringByEvaluatingJavaScriptFromString does.

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Android :: Better JavaScript Debugging For WebView

Mar 4, 2009

I'm debugging a Javascript+HTML app. All the content is in ./assets.

The app works fine in Firefox, Safari and iPhone (over the web).

But in the WebView, I only get: D/WebCore (626): Console: undefined line: 0 source: undefined

I need to debug this code. Could I either: - enable more debugging in the WebView? though I think this needs to be done in the framework. or: - set up a desktop WebView equivalent where I can run a Javascript debugging tool?

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Android :: Return Value From Javascript In Webview

Jul 21, 2010

I want to get a return value from javascript in android. With Iphone, i can do it, but Android, i can't. I use loadUrl but return void not object.

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Android :: Webview Cannot Handle Javascript

Aug 10, 2010

My android application displays webpages(i used webview for it). .but javascript onthe wepage is not running in a webview .If i visit the same webpage through the Browser,javascript is running . How to run javascript in an application(using a webview)?

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Android :: Evaluate Javascript Value On WebView

Nov 10, 2010

I open a webview page that page have:

CODE:.............

These javascript
When I press a button on the webview I have to read the "iPhoneStatus" value and close the webview screen and decide the result.

I wrote these codes in my .java class

CODE:..........

But it never go in the onJsAlert method, is there any way to evaluate the value of GetStatus()

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Android :: Reverse Image Load Order - Loading Animation In A Image View While The Real Image Is Loaded?

Jul 21, 2010

I use http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview/3068012#3068012 to load images in a ListView and a GridView. It works but the images are loaded form bpttom to top. How to fix that?

Bonus Question: Can I use a loading animation in a image view while the real image is loaded? Right now it's just a default image.

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Android :: Opening Page With Javascript Pop Ups In Webview

Sep 27, 2010

I am very new to both android webkit and javascript. I have a web page with 3 links (say A,B,C). When I open that page on my PC browser(Chrome), and click on the links, A opens in the same browser window whereas B and C pops up a new window. In my application I am loading the original URL in a WebView. I have implemented my WebViewClient and overridden the shouldOverrideUrlLoading. I am getting the call to shouldOverrideUrlLoading whenever I click on A, but not getting it when I click on B or C?

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Android :: Where JavaScript Exceptions Displayed When Using WebView

Feb 9, 2010

I have this simple HTML that I load into an Android WebView (SDK version 1.5)-

<html>
<body onload="nomethod()">
<h1>Hello World</h1>
</body>
</html>

Function nomethod() doesn't exist but the LogCat doesn't display any error. It seems that any exception that isn't caught cannot be traced. how can I handle or trace uncaught exceptions?

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Android :: JavaScript Sometimes Doesn't Work In Webview

Jul 22, 2010

I put a webview in my application to visit a webpage which includes some javascript functions, my purpose is when users click a link in the webpage, it will start a new activity in the application. I've written "webSettings.setJavaScriptEnabled(true);" in my source codes.

It works well in most of the time, however sometimes it doesn't work, there is no response when users click, and I don't know why because the environment is not changed at all.

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Android :: WebView Playing Audio With Javascript

Sep 25, 2010

I'm trying to very quickly port over an html application with plays sound (with soundmanager2) to a native android app using WebView. From my research, I haven't seen any evidence that sound, such as mp3s, can be played via javascript or any other methods using WebView.

My goal now is to quickly port over the html app and then eventually create a truely native application without using WebViews.

If anyone has been able to successfully implement playing audio using WebViews and Javascript or if this is just not possible at this time.

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Android :: Webview - Possible To Execute Javascript From Java Synchronously

Apr 6, 2009

I am writing a hybrid web/native app and ran into issue. My app downloads a music file via Java code, and needs to update a Javascript download progress bar in the WebView in real time.

My understanding is the only way to call Javascript from Java is via the WebView's loadUrl method.

CODE:................

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Android :: WebView - Documentation Of JavaScript And Java Interaction

Sep 30, 2010

I have found that there is a significant lack of documentation of WebView's ability to communicate with Java via WebView.addJavaScript() method. First, the debug document http://developer.android.com/guide/developing/debug-tasks.html#Debugg... appears to no longer work. Second, what object types should we expect when going to and from JavaScript. I have done some trial and error and it appears that complex types can cross the boundary, for example java.util.Vector. However when a Java method returns a byte array to JavaScript it has a type of undefined and I have been unable to coerce it to any other type. Finally, there is great potential with this interface and with some more attention we could go far.

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Android :: Use WebView To Evaluate Javascript String And Return Value

Dec 1, 2009

Given that scripting is not natively supported in Android and wrapping libraries like javax.script.ScriptEngine into your app will make it too large, is it possible to send a javascript string to an invisible WebView and have it evaluate the string and return you the results (another string)?

I want to go this route because I want to save all my scripts to disk so my app can remain small.

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Android :: Javascript Problem With Webview Runing Under HTC Desire

May 31, 2010

I am developing an application with Webview. The web app that runs inside the Webview is loaded from internet, and it is a single HTML file. I use javascript for showing and hiding the divs, depending on the section button the user had tapped on.

The problem is simple: after a little while (this time period seems to be random), javascript stops working inside the Webview object. Then, after a few seconds (10-30 seconds), javascript works again. It doesn't work any javascript. Nothing.

The strange thing is that the problem only happens when the application runs in a HTC Desire. I tested it in two different HTC Desire, and the problem happens in both devices. I tested it in a Motorola Milestone, in a HTC Hero and under emulator (1.5,1.6,2.1) and the application works fine, no error at all.

The problem happens using Wifi or mobile network.

I tried the debugger, but "Dev tools" crashes when I tap in "Development Settings". I also tried to compile the application for debugging under Eclipse, but adb does not show me info about the WebView object.

The HTC Desire firmware version is 2.1-update1. Kernel version: 2.6.29-3cb3dfbf. Build number: 1.15.161.4 Webkit 3.1

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Android :: Pass Javascript Function To Java Using Webview AddJavascripInterface

May 12, 2009

I made a webview.addjavascriptinterface(geo, "geo"); to access the geo class from javascript, and, in the html-javascript I write: --------- function successCallback(p){ document.write("helo"); }

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Android :: Detect Click On HTML Button Through Javascript In WebView

Oct 31, 2010

I'm not highly familiar with javascript but I think this is the best way to accomplish my purpose. If not, please correct me. I have a licence text 2 buttons at the end. All of this is written in HTML in a WebView because there are some links in the licence. Now, I want that when the user clicks the "ok" button in the WebView, this triggers some javascript or listener that I can grab in Java to fire an Intent to go forward in the application. (The cancel button would do the opposite, but if I know how to do one, I can do the other. Does this rings any bell to someone? Any explanation or sample code is welcome.

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Can't Parse JSON In Webview Via JavaScript

Sep 4, 2013

I am trying to parse some JSON Code in the webview of an android app; but it is completely failing.

Code:
window.android.log(base64_decode(emails[i]));
var test = JSON.parse(base64_decode(emails[i]));
and the results:
[code]...

I have tried using JSON2, and JQueries parseJSON function; both have returned the same error;

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Android :: Image Transparency - Load An Image File Into An ImageView Object

Aug 24, 2010

Is there a way to load an image file into an ImageView object, and then define a transparent color for this object?

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Android :: How To Load Url In Webview?

Jun 11, 2010

Below code not working in my system. Code...

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Android :: Can I Load Pdf Url On Webview?

May 11, 2009

I am trying to load a pdf file on a webview but it doesn't seem to work. i am wondering if pdf formate is supported for webview or not? If not then which file format would be suitable for ebook app contains images as well?

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Android :: Can't Seem To Load A Webview From Xml

May 5, 2010

Well, I'm trying to follow the tutorial from http://rapidandroid.org/wiki/Graphing. But I found a problem just in the first part of it. I'll describe the problem here, I just cannot understand how this could be wrong, it's pretty simple stuff. What am I doing wrong here? First I created a xml file called statistics.xml, in it among other things I put this code...
The problem arises here, as I seem to be getting null for wv whenever I test for it. Which means of course that findViewById(R.id.webview) couldn't find the view. But again, what am I doing wrong? Of course I know I could also instantiate the webview directly from code without the need to specify it from the xml, but I was just wondering what was wrong about this way of doing it. Just in case I also added the following line in my android manifest file.

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Android :: Load An SWF Into A WebView

Jun 8, 2010

I'm having problems with this. If I go to an SWF directly in the browser, it works fine. If I attempt to use loadUrl on an SWF file it stays blank and loads nothing.

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Android :: Way To Load PNG Data To WebView?

Sep 23, 2009

I have an instance of Bitmap that I want to load into the WebView. How can I do this? I do not want to call webview.loadUrl() as the image is already loaded from the file into memory . I am trying to optimize my code. I can see webview.loadData() however, seems like I have to encode Bitmap into UTF-8?? I have two questions: 1) How can I use webview.loadData() from a Bitmap instance?

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Android :: How To Load A URL Without Initializing Webview?

Feb 25, 2009

Is there any way I can load a URL without actually having the user see the web page? I'm trying to make a game with a hi score table, and loading the hi score URL in the browser would reveal the mechanism and allow the hi scores to be easily hacked. I have a php file on my server that my application is supposed to load to submit the hi score.

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Android :: Load URL In Background In WebView

Jul 6, 2009

What i want is when first time application runs then it should show only image in the full screen and one progress bar. And in the background there should be a url like http://www.google.com should be loaded in WebView. Once the url loads fully then my first screen which contains progress bar and image should move away and new screen with loaded url comes up. Is it possible to load the url in the webview as a background and once loaded then only webview should appear.

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Android :: Android WebView Not Loading A JavaScript File But Android Browser Loads It Fine

Jun 3, 2010

I'm writing an application which connects to a back office site. The backoffice site contains a whole slew of JavaScript functions, at least 100 times the average site. Unfortunately it does not load them, and causes much of the functionality to not work properly. So I am running a test. I put a page out on my server which loads the FireBugLite javascript text. Its a lot of javascript and perfect to test and see if the Android WebView will load it. The WebView loads nothing, but the browser loads the Firebug Icon. What on earth would make the difference, why can it run in the browser and not in my WebView? Any suggestions.
More background information, in order to get the stinking backoffice application available on a Droid (or any other platform except windows) I needed to trick the bakcoffice application to believe what's accessing the website is Internet Explorer. I do this by modifying the WebView User Agent.Also for this application I've slimmed my landing page, so I could give you the source to offer me aid. package ksc.myKMB;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class myKMB extends Activity {
I already have JavaScript on the web browser on, the problem is the web view is acting to different from the web browser.

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