so i have a question about open websites with the webView.loadURL function. On ios the scale factor seems to be perfect, and the page fits perfect to the Rectangle I create to visualize the page. But if i create a build for andorid, the website opens with the maximum of zoom, so I have to tap into the screen and zoom out to see the complete page.
Has someone an idea how to determine the automatic zoom on android? It would be great if I load the page, and it would be showed completely, without a zoomfactor like on ios.
To change the size of the rectangle wouldn't be a solution, because I have a fix size, and I need to keep it.
Best regards and thanks a lot!
Hopefully it is not too late and hopefully this time it will be useful.
Try adding an element into the dom like this:
var webView:StageWebView = new StageWebView();
webView.viewPort = new Rectangle( 0, 0, this.stage.stageWidth, this .stage.stageHeight);
webView.stage = this.stage;
var htmlString:String = "<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/>";
webView.loadString( htmlString );
If you can access the source code of the website, try to write this: <meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;" />
Related
I have a webpage which have a "viewport" tag with the following value:
<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />
I want to allow zooming on that page which is displayed in a WebView
so I inject some javascript on onPageFinished() as follow:
webView.loadUrl("javascript:document.getElementsByName('viewport')[0].setAttribute('content', 'width=device-width, minimum-scale=1.0, maximum-scale=1.0, user-scalable=yes');");
but it doesn't work.
* I also tried rearranging properties like this
webView.loadUrl("javascript:document.getElementsByName('viewport')[0].setAttribute('content', 'user-scalable=yes, width=device-width, minimum-scale=1.0, maximum-scale=1.0');");
or removing the property like this
webView.loadUrl("javascript:document.getElementsByName('viewport')[0].setAttribute('content', 'width=device-width, minimum-scale=1.0, maximum-scale=1.0');");
with the same result.
after some trials I found out that I can override maximum-scale only if there was no "user-scalable=no" defined at all in the page.
for example if the Viewport metadata was like this:
<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0" />
everything would work just fine.
I checked the value of the "viewport" tag after injection using javascript:alert(...), and it was modified by the injection, yet with no actual result.
I tried setting UseWideViewPort with true or false, and it didn't help neither:
webView.getSettings().setUseWideViewPort(true);
//or
webView.getSettings().setUseWideViewPort(true);
the samething with setLoadWithOverviewMode()
zooming doesn't work even programmatically using zoomIn() or zoomOut().
I've tested using android 2.3 and android 4.4.2 with the same results.
note: I did read almost all the questions on this site related to zooming and viewport, but nothing was useful in my case.
my webView settings are defined as follow:
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setSupportZoom(true);
webView.getSettings().setBuiltInZoomControls(true);
So is there any other ways to allow zooming and override the metadata?
a solution which is compatible with API 10 would be very appreciated.
Very nicely asked. This code worked for me, despite being essentially what you stated didn't work, can't say why we are getting different results. You have to change the document's properties since the WebView respects those.
public void onPageFinished(WebView view, String url)
{
webView.loadUrl("javascript:document.getElementsByName('viewport')[0].setAttribute('content', 'initial-scale=1.0,maximum-scale=10.0');");
}
Can anyone please help me get the external page that the Cordova InAppBrowser loads on Android app to fit to the phone screen size ?.
I am invoking the inapp browser from a Sencha Touch app using the follwing code.
var opt = 'location=no,clearcache=yes,closebuttoncaption=Back,EnableViewPortScale=yes';
window.open('http://sg-prod-mobilityapi.cloudapp.net','_blank', opt);
When ever I invoke the url I get the following screen
Could anyone please help me out ?.
Add this code into your index.html
<meta content=
"width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no"
name="viewport" />
If the external page fit to the browser viewport, it should have a responsive design. I gone through that url, in that the middle div is set with fixed width and height of 340x380 px. you can only enable the zooming in in app browser.
Also phonegap allow you to execute some scripts after loading the url, just like injecting scripts.
var iabRef = window.open('http://sg-prod-mobilityapi.cloudapp.net', '_blank', 'location=yes');
iabRef.addEventListener('loadstop', replaceCustomStyle);
function replaceCustomStyle() {
iabRef.executeScript({
code: "var itm = document.querySelector('#Main div');
itm.setAttribute('style','width:100%');"
}, function() {
alert("Element Successfully Hijacked");
});
}
Try this and it is documented here
I am working on a web app which has a width of 640px.
In the document head I set
<meta name="viewport" content = "width=640, user-scalable=no" />
so the content is nicely displayed and stretched horizontally.
This works perfectly on iOS but in Android the browser opens the website zoomed in so the user has to double click to zoom out and the entire page.
When I change the viewport setting to leave out the user-scalable tag like this:
<meta name="viewport" content="width=640" />
the Android browser adjusts nicely to the 640px - so it works.
The problem however now is, that users can zoom in and out on Android and iOS since the user-scalable tag is not set.
How can I forbid the scaling and at the same time set the viewport width to 640px on Android?
Trying rendering the viewport meta tag like so:
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
Setting scale settings will set user restrictions on how far they can zoom, and so if you set the initial and maximum to the same amount, this should fix the problem.
UPDATE: I was able to fix my bug for android devices all together by setting the below:
<meta name="viewport" content="width=640px, initial-scale=.5, maximum-scale=.5" />
I also noticed that some content, such as p tags were not flowing across the screen, so the hack for that would be to add the background-image property with empty string to any content that is stuck and is not going across the layout view. Hope this helps this time for you.
I wanted mobile to always show a website 640px wide because of a design that would break otherwise. (a design I did not make..) Thereby I wanted to disable zooming for mobile users. What worked for me me is the following:
- UPDATED 2013-10-31
First of all, there is no way you can do this without Javascript. You will have to check the user agent string. Therefore I created a mobile-viewport.js and included the script just before the closing tag:
function writeViewPort() {
var ua = navigator.userAgent;
var viewportChanged = false;
var scale = 0;
if (ua.indexOf("Android") >= 0 && ua.indexOf("AppleWebKit") >= 0) {
var webkitVersion = parseFloat(ua.slice(ua.indexOf("AppleWebKit") + 12));
// targets android browser, not chrome browser (http://jimbergman.net/webkit-version-in-android-version/)
if (webkitVersion < 535) {
viewportChanged = true;
scale = getScaleWithScreenwidth();
document.write('<meta name="viewport" content="width=640, initial-scale=' + scale + ', minimum-scale=' + scale + ', maximum-scale=' + scale + '" />');
}
}
if (ua.indexOf("Firefox") >= 0) {
viewportChanged = true;
scale = (getScaleWithScreenwidth() / 2);
document.write('<meta name="viewport" content="width=640, user-scalable=false, initial-scale=' + scale + '" />');
}
if (!viewportChanged) {
document.write('<meta name="viewport" content="width=640, user-scalable=false" />');
}
if (ua.indexOf("IEMobile") >= 0) {
document.write('<meta name="MobileOptimized" content="640" />');
}
document.write('<meta name="HandheldFriendly" content="true"/>');
}
function getScaleWithScreenwidth() {
var viewportWidth = 640;
var screenWidth = window.innerWidth;
return (screenWidth / viewportWidth);
}
writeViewPort();
The script checks if the visitor has an android (not chrome) or firefox browser. The android browser does not support the combination of width=640 and user-scalable=false, and the firefox browser does have a double screen width for some strange reason. If the visitor has a windows phone IE browser MobileOptimized is set.
I had the same situation, if you want the content to always fit the screen width without allowing the user to zoom in/out, use the following meta tags (this will work no matter what width you give)
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
I am working on an app for android tablets using phonegap. I am converting an existing webpage, so I would prefer to not change the css or html. I am testing using a galaxy tab (android 2.2)
I want to set the viewable width to be 800px and disable the user from zooming in/out.
If I use <meta name="viewport" content="width=800px>, then the width is set correctly but the user can still scale the page.
If I use <meta name="viewport" content="width=800px, user-scalable=no">, then the user can't scale the page, but the width will be smaller (ie. the page is zoomed in, and the user has to scroll around to view the page)
The only other thing I can think of is using <meta name="viewport" content="minimum-scale=x, maximum-scale=x"> where x is some magical number which I don't know how to find.
Any help would be appreciated.
this worked for me:
<script>
$(document).ready(function(){
var vpScale = window.outerWidth/800/window.devicePixelRatio;
var metas = document.getElementsByTagName('meta');
var i;
for (i=0; i< metas.length; i++) {
if (metas[i].name == "viewport") {
metas[i].content = "minimum-scale=" + vpScale + ", maximum-scale=" + vpScale;
}
}
});
</script>
What combination of META tag settings in HTML and WebSettings in Java should I use to get the following result: window.innerWidth in Javascript should be always (in any Android version and on any device) equal to the WebView width in pixels.
For instance, I set the WebView width to 1024px. In Android AVD emulator, window.innerWidth is equal to 683px (2/3 of 1024, or 150% scale).
I tried the following META:
<meta name="viewport" content="width=device-width;
user-scalable=no; initial-scale=1.0;
minimum-scale=1.0; maximum-scale=1.0;" />
-- doesn't work.
Then I tried:
_WebView.getSettings().setLoadWithOverviewMode(true);
_WebView.getSettings().setUseWideViewPort(true);
_WebView.setInitialScale(100);
-- doesn't work too.
Finally,
_WebView.getSettings().setDefaultZoom(ZoomDensity.FAR);
seems to be working. According to documentation, it means "100% looking like in 240dpi". I don't know, what dpi users device has! How to get the task done correctly?
UPDATE
I've just tested ZoomDensity.FAR on a high-dpi tablet -- it works without it and doesn't work with it!
Regards,
META:
meta name="viewport" content="width=device-width; user-scalable=no; initial-scale=1.0;
minimum-scale=1.0; maximum-scale=1.0; target-densityDpi=device-dpi;"
Java:
_WebView.getSettings().setLoadWithOverviewMode(true);
_WebView.getSettings().setUseWideViewPort(true);
This combination works.