Android webview scaling issue

Question

I have a Grid View in WebView(Android) and need to determine number of items that can be fit on the screen. I need this number to be sent to server to retrieve those many items from server. When I query the screen size in my Activity, it returns width : 800 and and height: 522(in landscape). But when the width is queried from javascript, the width returned is 1063. I have done appropriate settings for Viewport.

<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0" />

As both the values are different, it messes my calculations. The WebView display more items than my calculations per items.

Can someone please point out what am I messing up?

Thanks.

Yashpal Singla · Accepted Answer · 2013-02-11 09:02:20Z

2

You need to map the webview with the screen layout by using setInitialScale over the webview.

Initial scale is defined in % so you need to specify something like below

int scalingFactor = ((float)800/(float)1063)*100

mPageWeb.setInitialScale(scalingFactor);

I hope this will solve your issue.

answered Feb 11, 2013 at 9:02

Yashpal Singla

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3 Comments

SwapsAgNO3 Over a year ago

I had already set Webview.setInitialScale(100); I need to know why I get 1063. This value is returned for a particular device. I am sure other devices might return other values. Hence I cannot use the solution you have mentioned. I need to know the reason why I receive that value, so that I can formulate a solution for all devices.

Yashpal Singla Over a year ago

Not to 100 to int scalingFactor = ((float)800/(float)1063)*100

SwapsAgNO3 Over a year ago

The point that I am trying to make is I cannot use 1063. This value appears for only one device i.e. for a tablet. If I use a 240*320 device this value will change and the scaling factor calculated using your approach will be wrong for it. Hence I need the reason for this value occurring.

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