Android :: Web Views Restore Picture Method - Preventing Webview To Reload Page
Nov 18, 2010
As I say in the topic, I want my WebView to prevent from reloading the webpage when another activity comes to the foreground or just when the orientation is changed. The reason why is because the WebView content is generated by Javascript/AJAX almost completely. After searching on a couple of forums, I found out many people suggested to use "saveState" and "restoreState" methods, but when I look the documentation, it says:Please note that this method no longer restores the display data for this WebView. See savePicture(Bundle, File) and restorePicture(Bundle, File) for saving and restoring the display data.So, here I was using that savePicture and restorePicture as it follows:protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); some other lines
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.webview);
if (savedInstanceState == null){
loadInicialWebUi();
}else{ mWebView.restoreState(savedInstanceState);
boolean restoredPic = mWebView.restorePicture(savedInstanceState, new File("savedDisplayWebView.temp"));
Log.d(TAG, "restored Picture:" + restoredPic);
@Override protected void onSaveInstanceState(Bundle savedInstanceState) {
mWebView.saveState(savedInstanceState);
boolean savedPic = mWebView.savePicture(savedInstanceState, "savedDisplayWebView.temp");
Log.d(TAG, "saved Picture:" + savedPic);
super.onSaveInstanceState(savedInstanceState);
}And well, those logs were revealing that it saves the picture, but it couldn't restore it. I suspect there might be something about the File references, but I couldn't think of a better way of getting the reference of the File I created when saving the state.Anyone thrilled?
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Aug 26, 2010
I have an android application that loads web pages in an activity with a WebView. I am using the retrieving the page manually and using WebView's loadDataWithBaseURL to display it on screen. Everything there is fine.
Now, i am trying to override the Back button press to simulate going back in the WebView history stack. I am able to override the Back button press, i can see that there is a history stack in the WebView, i can see that the history url is correct, but when i call WebView's goBack() method, it displays a blank page.
If i use WebView's loadUrl method, the Back button with an override works as intended. But why.... If i need to handle this manually, how do i start messing with history pages?
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Feb 13, 2010
When i load a url in a webview. it loads perfectly. but i touch anything in that webview its redirected to the browser by default.
how to set that link will load in the same webview itself.
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Feb 2, 2009
I am developing simple RSS Reader kind of application.In my applicaion i cant go back from Webview page to previous page.i can go back from all pages except the page where i have used Webview.What could be the reason?why i cant go back?
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Aug 8, 2009
Some WebView/WebPage contains combobox control and I want to extract these combobox entries from a webview. Is there any way to extract combobox entries from webview?
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Aug 30, 2010
Is there (or should there be), a generateId() method for dynamically generated Views? Take the RadioGroup example in APIDemos|App|Views. Radio buttons are added dynamically. For each button, you have to call setId(). To be notified when a radio button is selected, you register a onCheckedChange listener on RadioGroup and the callback method is oncheckedChange(RadioGroup, int checkedId). Since we are notified only the id of the checked view, shouldn't there be a way to uniquely generate the id? Say, a View.generateId() method... In the example, the ids are statically defined in ids.xml. However this limits the number of radio buttons. I have a real world example too: a Radiogroup with each choice representing a Wifi hotspot. So one cannot know in advance the number of hotspots.
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Oct 14, 2010
When i click home button and then come back to to my application it doesn't show the last values on the listview or any other view it just look same with when i started the application.I believe it is can be done with onResume and onPause but i couldn't find how.
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Sep 20, 2012
I am a Android Apps developer, I would like to know the statistics of other Apps. I can get the installation range data from the store, but I am looking for specific numbers, How can we get it.
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Mar 4, 2010
On Android, I have a WebView that is displaying a page. How do I get the page source without requesting the page again?
It seems WebView should have some kind of .getPageSource() method that returns a string, but alas it does not.
If I enable javascript, what is the appropriate javascript to put in this call to get the contents? code...
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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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Jan 11, 2010
I am trying to parse a page loaded in a webview. Following is the code
URL url = new URL(myURLToLoad); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = dbf.newDocumentBuilder(); Document dom = builder.parse(url.openStream ()); --------> * String value = dom.getElementById(myDivID).getNodeValue ();
The code runs till * and then quits...I am not sure what is wrong with this..Can anyone help...Or if you can suggest any alternate method it
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Feb 10, 2009
It's easy to get current page's url and title of webkit.WebView. But I could not find way to get page content of WebView.
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Apr 30, 2009
After I have loaded WebView with a html page, is it possible to get the position of the region that is currently being displayed within the WebView widget?
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Nov 30, 2009
I'm loading a URL into a WebView and I'm having difficulty setting the "scale" of the web-page. Specifically, the web-page is too big (800x600) for the screen, so my thought is to use "setInitialScale(50)" to reduce the size. Here is some sample code that doesn't work (i.e. the web-page doesn't scale to 50%)
WebView wv = (WebView)findViewById(R.id.webview);
wv.loadUrl("http://www.example.com/android/symptom");
wv.setInitialScale(50);
I also tried switching the order of the function calls but I get the same resultŠi.e.,
WebView wv = (WebView)findViewById(R.id.webview); wv.setInitialScale(50); wv.loadUrl("http://www.example.com/android/symptom");
As an alternative, I have tried to use the "zoomOut()" function like this:
WebView wv = (WebView)findViewById(R.id.webview);
wv.loadUrl("http://www.example.com/android/symptom"); wv.zoomOut();
This approach works for a split second, and then the image reverts to its original size.
Here is my content view:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent"> <WebView android:id="@+id/webview"
android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>
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Jun 18, 2010
I am working on webview android application and I am successfully able to load a URL in that webview and when I click a link in the webview, I want to capture the new URL string. For example, I search in google and browser opens in webview with multiple search links, Now I click on a link and google opens that link in that scenario, I want to capture that opening link bottom point is. I am trying to open next link in new webview, just like tabbed browsing.
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Aug 4, 2010
For example if a WebView loaded "test.html?PageId=10", how would I get that PageId is equal to 10?
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Apr 2, 2010
Trying to create a WebView but it only shows a blank/white page. I have followed several examples and they all say that work with this code...
Here is my code:
CODE:.................
And here is the web_view.xml:
CODE:..................
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Aug 26, 2010
I am wondering how does webview load a particular URL. Does it create a new thread or load the URL in the same thread i.e. UI thread? The reason I am asking this is I am facing some weird wakeup lock issue when I launch an Activity from current Activity (in current Activity's onCreate method) which creates a WebView in it's onCreate method and loads a URL using loadUrl method. So when I am done with this activity and go back to the Activity which launched this is restarted because wakeup lock time was expired.I googled it and found out that if onCreate method of an Activity takes too long then this type of issue might occur. Have any of you faced this kind of issue involving a WebView? Any kind of help would be really appreciated.
Here is sample code.Activity A:
CODE:.........................
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Aug 25, 2010
I need to make a WebView show some web pages where some parts are offline (on the SD card) and some are online (retrieved via http). For instance, som pictures or javascript files may be local on the sd card, and some may be online. Target is Android 1.6, and I have full control over the server, and the files on the server.
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May 26, 2010
I would like to a WebView to run some JavaScript before loading the rest of the page. This JavaScript should run in the same context of the page, just as if extra <script> content were added before any other <script> content. This is not possible with add Java script Interface() since I want to set up some instance variables, before the page scripts are run, so that the page scripts can use them.
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Jul 7, 2010
I was working on webview following the link http://developer.android.com/resources/tutorials/views/hello-webview.html and it is working fine but the problem is i cant view the whole page i mean that it is horizontally not scrollable.
How can i view the whole page by scrolling both horizontally and vertically?
CODE:...................
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Jul 16, 2010
Basically, we want to control the default visible part in a webview control after a new web page is loaded. We tried the javascript "window.scrollBy(...)", it works. However, "window.moveTo(...)" does not work. Is there any trick here?
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Sep 20, 2010
Does anyone know how to avoid getting mobile views (page) on web sites in the browser? I can't figure it out. My old HTC Hero had a way to not get the mobile versions..
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Sep 18, 2009
How to reference resources (images) from a HTML page in webview? I am trying to display an image in HTML and the image is an android resource. <html> <body> <img src=" ? " /> </body> </html>
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Jun 1, 2009
Can you please tell me how can I listen for WebView for a page load complete event?
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May 8, 2009
Is it possible to listen for WebView page load completed event (the whole page is loaded including images, js files, css files and the page is completely rendered.
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Sep 13, 2010
I used webview to visit https link. the page always show blank. i found the way to dill with it
CODE:................
That's work fine.
But i used API Android 2.1, the above method is belongs to Android 2.2.
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May 5, 2010
I'm got a custom webview setup which is working pretty well, but I'd like to be able to either:
1, change the url hash without the webview reloading the page (it would lose the state of my js app)
2, call some js that sits within my web page from within android. I can't change any JS within the site, unfortunately, so can't custom write any js to put on the site especially for the job, the only stuff I have control over is the Android app.
Can anyone think of a way of doing either of these?
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Feb 20, 2009
Can Webview tell me that I didn't get a HTTP 200 OK HTTP response code? I really don't want to display the Android Web Page Not Available screen inside my app.
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Apr 5, 2010
I use webview app to open a web page (url). This web page has a form with a select element to choose. I would like to tell to select a specific value without click the element.
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